three characteristics of a strong thesis statement

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How to Write a Thesis Statement | 4 Steps & Examples

How to Write a Thesis Statement | 4 Steps & Examples

Published on January 11, 2019 by Shona McCombes . Revised on August 15, 2023 by Eoghan Ryan.

A thesis statement is a sentence that sums up the central point of your paper or essay . It usually comes near the end of your introduction .

Your thesis will look a bit different depending on the type of essay you’re writing. But the thesis statement should always clearly state the main idea you want to get across. Everything else in your essay should relate back to this idea.

You can write your thesis statement by following four simple steps:

Start with a question
Write your initial answer
Develop your answer
Refine your thesis statement

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What is a thesis statement, placement of the thesis statement, step 1: start with a question, step 2: write your initial answer, step 3: develop your answer, step 4: refine your thesis statement, types of thesis statements, other interesting articles, frequently asked questions about thesis statements.

A thesis statement summarizes the central points of your essay. It is a signpost telling the reader what the essay will argue and why.

The best thesis statements are:

Concise: A good thesis statement is short and sweet—don’t use more words than necessary. State your point clearly and directly in one or two sentences.
Contentious: Your thesis shouldn’t be a simple statement of fact that everyone already knows. A good thesis statement is a claim that requires further evidence or analysis to back it up.
Coherent: Everything mentioned in your thesis statement must be supported and explained in the rest of your paper.

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The thesis statement generally appears at the end of your essay introduction or research paper introduction .

The spread of the internet has had a world-changing effect, not least on the world of education. The use of the internet in academic contexts and among young people more generally is hotly debated. For many who did not grow up with this technology, its effects seem alarming and potentially harmful. This concern, while understandable, is misguided. The negatives of internet use are outweighed by its many benefits for education: the internet facilitates easier access to information, exposure to different perspectives, and a flexible learning environment for both students and teachers.

You should come up with an initial thesis, sometimes called a working thesis , early in the writing process . As soon as you’ve decided on your essay topic , you need to work out what you want to say about it—a clear thesis will give your essay direction and structure.

You might already have a question in your assignment, but if not, try to come up with your own. What would you like to find out or decide about your topic?

For example, you might ask:

After some initial research, you can formulate a tentative answer to this question. At this stage it can be simple, and it should guide the research process and writing process .

Now you need to consider why this is your answer and how you will convince your reader to agree with you. As you read more about your topic and begin writing, your answer should get more detailed.

In your essay about the internet and education, the thesis states your position and sketches out the key arguments you’ll use to support it.

The negatives of internet use are outweighed by its many benefits for education because it facilitates easier access to information.

In your essay about braille, the thesis statement summarizes the key historical development that you’ll explain.

The invention of braille in the 19th century transformed the lives of blind people, allowing them to participate more actively in public life.

A strong thesis statement should tell the reader:

Why you hold this position
What they’ll learn from your essay
The key points of your argument or narrative

The final thesis statement doesn’t just state your position, but summarizes your overall argument or the entire topic you’re going to explain. To strengthen a weak thesis statement, it can help to consider the broader context of your topic.

These examples are more specific and show that you’ll explore your topic in depth.

Your thesis statement should match the goals of your essay, which vary depending on the type of essay you’re writing:

In an argumentative essay , your thesis statement should take a strong position. Your aim in the essay is to convince your reader of this thesis based on evidence and logical reasoning.
In an expository essay , you’ll aim to explain the facts of a topic or process. Your thesis statement doesn’t have to include a strong opinion in this case, but it should clearly state the central point you want to make, and mention the key elements you’ll explain.

If you want to know more about AI tools , college essays , or fallacies make sure to check out some of our other articles with explanations and examples or go directly to our tools!

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A thesis statement is a sentence that sums up the central point of your paper or essay . Everything else you write should relate to this key idea.

The thesis statement is essential in any academic essay or research paper for two main reasons:

It gives your writing direction and focus.
It gives the reader a concise summary of your main point.

Without a clear thesis statement, an essay can end up rambling and unfocused, leaving your reader unsure of exactly what you want to say.

Follow these four steps to come up with a thesis statement :

Ask a question about your topic .
Write your initial answer.
Develop your answer by including reasons.
Refine your answer, adding more detail and nuance.

The thesis statement should be placed at the end of your essay introduction .

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Tips and Examples for Writing Thesis Statements

Table of contents, introduction, what is a thesis statement, 1. the role of the thesis statement, a. guiding your writing:, b. engaging your readers:, 2. characteristics of a strong thesis statement, a. specificity:.

A strong thesis statement is specific rather than vague or broad. It clearly defines the scope of your paper and outlines the specific aspects you will explore. Avoid general statements that could apply to any topic; instead, hone in on the particular angle or argument you will address.

B. Arguability:

C. reflection of the paper’s scope:, d. conciseness:.

A thesis statement should be concise, ideally one or two sentences long. It should convey your main point without unnecessary words or complex phrasing. Clear and direct language makes your thesis more impactful and easier for readers to understand.

Tips for Writing a Strong Thesis Statement

1. be specific, 2. make it arguable, 3. reflect the scope, 4. keep it concise, additional tips for writing a strong thesis statement, 1. revise and refine, 2. test your thesis, 3. seek feedback, 4. ensure clarity and precision, 5. align with your paper’s structure, 6. address the “so what” factor, thesis sentence example, examples of effective thesis statements.

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9.1 Developing a Strong, Clear Thesis Statement

Learning objectives.

Develop a strong, clear thesis statement with the proper elements.
Revise your thesis statement.

Have you ever known a person who was not very good at telling stories? You probably had trouble following his train of thought as he jumped around from point to point, either being too brief in places that needed further explanation or providing too many details on a meaningless element. Maybe he told the end of the story first, then moved to the beginning and later added details to the middle. His ideas were probably scattered, and the story did not flow very well. When the story was over, you probably had many questions.

Just as a personal anecdote can be a disorganized mess, an essay can fall into the same trap of being out of order and confusing. That is why writers need a thesis statement to provide a specific focus for their essay and to organize what they are about to discuss in the body.

Just like a topic sentence summarizes a single paragraph, the thesis statement summarizes an entire essay. It tells the reader the point you want to make in your essay, while the essay itself supports that point. It is like a signpost that signals the essay’s destination. You should form your thesis before you begin to organize an essay, but you may find that it needs revision as the essay develops.

Elements of a Thesis Statement

For every essay you write, you must focus on a central idea. This idea stems from a topic you have chosen or been assigned or from a question your teacher has asked. It is not enough merely to discuss a general topic or simply answer a question with a yes or no. You have to form a specific opinion, and then articulate that into a controlling idea —the main idea upon which you build your thesis.

Remember that a thesis is not the topic itself, but rather your interpretation of the question or subject. For whatever topic your professor gives you, you must ask yourself, “What do I want to say about it?” Asking and then answering this question is vital to forming a thesis that is precise, forceful and confident.

A thesis is one sentence long and appears toward the end of your introduction. It is specific and focuses on one to three points of a single idea—points that are able to be demonstrated in the body. It forecasts the content of the essay and suggests how you will organize your information. Remember that a thesis statement does not summarize an issue but rather dissects it.

A Strong Thesis Statement

A strong thesis statement contains the following qualities.

Specificity. A thesis statement must concentrate on a specific area of a general topic. As you may recall, the creation of a thesis statement begins when you choose a broad subject and then narrow down its parts until you pinpoint a specific aspect of that topic. For example, health care is a broad topic, but a proper thesis statement would focus on a specific area of that topic, such as options for individuals without health care coverage.

Precision. A strong thesis statement must be precise enough to allow for a coherent argument and to remain focused on the topic. If the specific topic is options for individuals without health care coverage, then your precise thesis statement must make an exact claim about it, such as that limited options exist for those who are uninsured by their employers. You must further pinpoint what you are going to discuss regarding these limited effects, such as whom they affect and what the cause is.

Ability to be argued. A thesis statement must present a relevant and specific argument. A factual statement often is not considered arguable. Be sure your thesis statement contains a point of view that can be supported with evidence.

Ability to be demonstrated. For any claim you make in your thesis, you must be able to provide reasons and examples for your opinion. You can rely on personal observations in order to do this, or you can consult outside sources to demonstrate that what you assert is valid. A worthy argument is backed by examples and details.

Forcefulness. A thesis statement that is forceful shows readers that you are, in fact, making an argument. The tone is assertive and takes a stance that others might oppose.

Confidence. In addition to using force in your thesis statement, you must also use confidence in your claim. Phrases such as I feel or I believe actually weaken the readers’ sense of your confidence because these phrases imply that you are the only person who feels the way you do. In other words, your stance has insufficient backing. Taking an authoritative stance on the matter persuades your readers to have faith in your argument and open their minds to what you have to say.

Even in a personal essay that allows the use of first person, your thesis should not contain phrases such as in my opinion or I believe . These statements reduce your credibility and weaken your argument. Your opinion is more convincing when you use a firm attitude.

On a separate sheet of paper, write a thesis statement for each of the following topics. Remember to make each statement specific, precise, demonstrable, forceful and confident.

Texting while driving
The legal drinking age in the United States
Steroid use among professional athletes

Examples of Appropriate Thesis Statements

Each of the following thesis statements meets several of the following requirements:

Specificity
Ability to be argued
Ability to be demonstrated
Forcefulness
The societal and personal struggles of Troy Maxon in the play Fences symbolize the challenge of black males who lived through segregation and integration in the United States.
Closing all American borders for a period of five years is one solution that will tackle illegal immigration.
Shakespeare’s use of dramatic irony in Romeo and Juliet spoils the outcome for the audience and weakens the plot.
J. D. Salinger’s character in Catcher in the Rye , Holden Caulfield, is a confused rebel who voices his disgust with phonies, yet in an effort to protect himself, he acts like a phony on many occasions.
Compared to an absolute divorce, no-fault divorce is less expensive, promotes fairer settlements, and reflects a more realistic view of the causes for marital breakdown.
Exposing children from an early age to the dangers of drug abuse is a sure method of preventing future drug addicts.
In today’s crumbling job market, a high school diploma is not significant enough education to land a stable, lucrative job.

You can find thesis statements in many places, such as in the news; in the opinions of friends, coworkers or teachers; and even in songs you hear on the radio. Become aware of thesis statements in everyday life by paying attention to people’s opinions and their reasons for those opinions. Pay attention to your own everyday thesis statements as well, as these can become material for future essays.

Now that you have read about the contents of a good thesis statement and have seen examples, take a look at the pitfalls to avoid when composing your own thesis:

A thesis is weak when it is simply a declaration of your subject or a description of what you will discuss in your essay.

Weak thesis statement: My paper will explain why imagination is more important than knowledge.

A thesis is weak when it makes an unreasonable or outrageous claim or insults the opposing side.

Weak thesis statement: Religious radicals across America are trying to legislate their Puritanical beliefs by banning required high school books.

A thesis is weak when it contains an obvious fact or something that no one can disagree with or provides a dead end.

Weak thesis statement: Advertising companies use sex to sell their products.

A thesis is weak when the statement is too broad.

Weak thesis statement: The life of Abraham Lincoln was long and challenging.

Read the following thesis statements. On a separate piece of paper, identify each as weak or strong. For those that are weak, list the reasons why. Then revise the weak statements so that they conform to the requirements of a strong thesis.

The subject of this paper is my experience with ferrets as pets.
The government must expand its funding for research on renewable energy resources in order to prepare for the impending end of oil.
Edgar Allan Poe was a poet who lived in Baltimore during the nineteenth century.
In this essay, I will give you lots of reasons why slot machines should not be legalized in Baltimore.
Despite his promises during his campaign, President Kennedy took few executive measures to support civil rights legislation.
Because many children’s toys have potential safety hazards that could lead to injury, it is clear that not all children’s toys are safe.
My experience with young children has taught me that I want to be a disciplinary parent because I believe that a child without discipline can be a parent’s worst nightmare.

Writing at Work

Often in your career, you will need to ask your boss for something through an e-mail. Just as a thesis statement organizes an essay, it can also organize your e-mail request. While your e-mail will be shorter than an essay, using a thesis statement in your first paragraph quickly lets your boss know what you are asking for, why it is necessary, and what the benefits are. In short body paragraphs, you can provide the essential information needed to expand upon your request.

Thesis Statement Revision

Your thesis will probably change as you write, so you will need to modify it to reflect exactly what you have discussed in your essay. Remember from Chapter 8 “The Writing Process: How Do I Begin?” that your thesis statement begins as a working thesis statement , an indefinite statement that you make about your topic early in the writing process for the purpose of planning and guiding your writing.

Working thesis statements often become stronger as you gather information and form new opinions and reasons for those opinions. Revision helps you strengthen your thesis so that it matches what you have expressed in the body of the paper.

The best way to revise your thesis statement is to ask questions about it and then examine the answers to those questions. By challenging your own ideas and forming definite reasons for those ideas, you grow closer to a more precise point of view, which you can then incorporate into your thesis statement.

Ways to Revise Your Thesis

You can cut down on irrelevant aspects and revise your thesis by taking the following steps:

1. Pinpoint and replace all nonspecific words, such as people , everything , society , or life , with more precise words in order to reduce any vagueness.

Working thesis: Young people have to work hard to succeed in life.

Revised thesis: Recent college graduates must have discipline and persistence in order to find and maintain a stable job in which they can use and be appreciated for their talents.

The revised thesis makes a more specific statement about success and what it means to work hard. The original includes too broad a range of people and does not define exactly what success entails. By replacing those general words like people and work hard , the writer can better focus his or her research and gain more direction in his or her writing.

2. Clarify ideas that need explanation by asking yourself questions that narrow your thesis.

Working thesis: The welfare system is a joke.

Revised thesis: The welfare system keeps a socioeconomic class from gaining employment by alluring members of that class with unearned income, instead of programs to improve their education and skill sets.

A joke means many things to many people. Readers bring all sorts of backgrounds and perspectives to the reading process and would need clarification for a word so vague. This expression may also be too informal for the selected audience. By asking questions, the writer can devise a more precise and appropriate explanation for joke . The writer should ask himself or herself questions similar to the 5WH questions. (See Chapter 8 “The Writing Process: How Do I Begin?” for more information on the 5WH questions.) By incorporating the answers to these questions into a thesis statement, the writer more accurately defines his or her stance, which will better guide the writing of the essay.

3. Replace any linking verbs with action verbs. Linking verbs are forms of the verb to be , a verb that simply states that a situation exists.

Working thesis: Kansas City schoolteachers are not paid enough.

Revised thesis: The Kansas City legislature cannot afford to pay its educators, resulting in job cuts and resignations in a district that sorely needs highly qualified and dedicated teachers.

The linking verb in this working thesis statement is the word are . Linking verbs often make thesis statements weak because they do not express action. Rather, they connect words and phrases to the second half of the sentence. Readers might wonder, “Why are they not paid enough?” But this statement does not compel them to ask many more questions. The writer should ask himself or herself questions in order to replace the linking verb with an action verb, thus forming a stronger thesis statement, one that takes a more definitive stance on the issue:

Who is not paying the teachers enough?
What is considered “enough”?
What is the problem?
What are the results

4. Omit any general claims that are hard to support.

Working thesis: Today’s teenage girls are too sexualized.

Revised thesis: Teenage girls who are captivated by the sexual images on MTV are conditioned to believe that a woman’s worth depends on her sensuality, a feeling that harms their self-esteem and behavior.

It is true that some young women in today’s society are more sexualized than in the past, but that is not true for all girls. Many girls have strict parents, dress appropriately, and do not engage in sexual activity while in middle school and high school. The writer of this thesis should ask the following questions:

Which teenage girls?
What constitutes “too” sexualized?
Why are they behaving that way?
Where does this behavior show up?
What are the repercussions?

In the first section of Chapter 8 “The Writing Process: How Do I Begin?” , you determined your purpose for writing and your audience. You then completed a freewriting exercise about an event you recently experienced and chose a general topic to write about. Using that general topic, you then narrowed it down by answering the 5WH questions. After you answered these questions, you chose one of the three methods of prewriting and gathered possible supporting points for your working thesis statement.

Now, on a separate sheet of paper, write down your working thesis statement. Identify any weaknesses in this sentence and revise the statement to reflect the elements of a strong thesis statement. Make sure it is specific, precise, arguable, demonstrable, forceful, and confident.

Collaboration

Please share with a classmate and compare your answers.

In your career you may have to write a project proposal that focuses on a particular problem in your company, such as reinforcing the tardiness policy. The proposal would aim to fix the problem; using a thesis statement would clearly state the boundaries of the problem and tell the goals of the project. After writing the proposal, you may find that the thesis needs revision to reflect exactly what is expressed in the body. Using the techniques from this chapter would apply to revising that thesis.

Key Takeaways

Proper essays require a thesis statement to provide a specific focus and suggest how the essay will be organized.
A thesis statement is your interpretation of the subject, not the topic itself.
A strong thesis is specific, precise, forceful, confident, and is able to be demonstrated.
A strong thesis challenges readers with a point of view that can be debated and can be supported with evidence.
A weak thesis is simply a declaration of your topic or contains an obvious fact that cannot be argued.
Depending on your topic, it may or may not be appropriate to use first person point of view.
Revise your thesis by ensuring all words are specific, all ideas are exact, and all verbs express action.

Home / Guides / Writing Guides / Parts of a Paper / How to Write a Strong Thesis Statement

How to Write a Strong Thesis Statement

A thesis can be found in many places—a debate speech, a lawyer’s closing argument, even an advertisement. But the most common place for a thesis statement (and probably why you’re reading this article) is in an essay.

Whether you’re writing an argumentative paper, an informative essay, or a compare/contrast statement, you need a thesis. Without a thesis, your argument falls flat and your information is unfocused. Since a thesis is so important, it’s probably a good idea to look at some tips on how to put together a strong one.

Guide Overview

What is a “thesis statement” anyway.

2 categories of thesis statements: informative and persuasive
2 styles of thesis statements
Formula for a strong argumentative thesis
The qualities of a solid thesis statement (video)

You may have heard of something called a “thesis.” It’s what seniors commonly refer to as their final paper before graduation. That’s not what we’re talking about here. That type of thesis is a long, well-written paper that takes years to piece together.

Instead, we’re talking about a single sentence that ties together the main idea of any argument . In the context of student essays, it’s a statement that summarizes your topic and declares your position on it. This sentence can tell a reader whether your essay is something they want to read.

2 Categories of Thesis Statements: Informative and Persuasive

Just as there are different types of essays, there are different types of thesis statements. The thesis should match the essay.

For example, with an informative essay, you should compose an informative thesis (rather than argumentative). You want to declare your intentions in this essay and guide the reader to the conclusion that you reach.

To make a peanut butter and jelly sandwich, you must procure the ingredients, find a knife, and spread the condiments.

This thesis showed the reader the topic (a type of sandwich) and the direction the essay will take (describing how the sandwich is made).

Most other types of essays, whether compare/contrast, argumentative, or narrative, have thesis statements that take a position and argue it. In other words, unless your purpose is simply to inform, your thesis is considered persuasive. A persuasive thesis usually contains an opinion and the reason why your opinion is true.

Peanut butter and jelly sandwiches are the best type of sandwich because they are versatile, easy to make, and taste good.

In this persuasive thesis statement, you see that I state my opinion (the best type of sandwich), which means I have chosen a stance. Next, I explain that my opinion is correct with several key reasons. This persuasive type of thesis can be used in any essay that contains the writer’s opinion, including, as I mentioned above, compare/contrast essays, narrative essays, and so on.

2 Styles of Thesis Statements

Just as there are two different types of thesis statements (informative and persuasive), there are two basic styles you can use.

The first style uses a list of two or more points . This style of thesis is perfect for a brief essay that contains only two or three body paragraphs. This basic five-paragraph essay is typical of middle and high school assignments.

C.S. Lewis’s Chronicles of Narnia series is one of the richest works of the 20th century because it offers an escape from reality, teaches readers to have faith even when they don’t understand, and contains a host of vibrant characters.

In the above persuasive thesis, you can see my opinion about Narnia followed by three clear reasons. This thesis is perfect for setting up a tidy five-paragraph essay.

In college, five paragraph essays become few and far between as essay length gets longer. Can you imagine having only five paragraphs in a six-page paper? For a longer essay, you need a thesis statement that is more versatile. Instead of listing two or three distinct points, a thesis can list one overarching point that all body paragraphs tie into.

Good vs. evil is the main theme of Lewis’s Narnia series, as is made clear through the struggles the main characters face in each book.

In this thesis, I have made a claim about the theme in Narnia followed by my reasoning. The broader scope of this thesis allows me to write about each of the series’ seven novels. I am no longer limited in how many body paragraphs I can logically use.

Formula for a Strong Argumentative Thesis

One thing I find that is helpful for students is having a clear template. While students rarely end up with a thesis that follows this exact wording, the following template creates a good starting point:

_____ is true because of _, _, and _____.

Conversely, the formula for a thesis with only one point might follow this template:

_ is true because of ___.

Students usually end up using different terminology than simply “because,” but having a template is always helpful to get the creative juices flowing.

The Qualities of a Solid Thesis Statement

When composing a thesis, you must consider not only the format, but other qualities like length, position in the essay, and how strong the argument is.

Length: A thesis statement can be short or long, depending on how many points it mentions. Typically, however, it is only one concise sentence. It does contain at least two clauses, usually an independent clause (the opinion) and a dependent clause (the reasons). You probably should aim for a single sentence that is at least two lines, or about 30 to 40 words long.

Position: A thesis statement always belongs at the beginning of an essay. This is because it is a sentence that tells the reader what the writer is going to discuss. Teachers will have different preferences for the precise location of the thesis, but a good rule of thumb is in the introduction paragraph, within the last two or three sentences.

Strength: Finally, for a persuasive thesis to be strong, it needs to be arguable. This means that the statement is not obvious, and it is not something that everyone agrees is true.

Example of weak thesis:

Peanut butter and jelly sandwiches are easy to make because it just takes three ingredients.

Most people would agree that PB&J is one of the easiest sandwiches in the American lunch repertoire.

Example of a stronger thesis:

Peanut butter and jelly sandwiches are fun to eat because they always slide around.

This is more arguable because there are plenty of folks who might think a PB&J is messy or slimy rather than fun.

Composing a thesis statement does take a bit more thought than many other parts of an essay. However, because a thesis statement can contain an entire argument in just a few words, it is worth taking the extra time to compose this sentence. It can direct your research and your argument so that your essay is tight, focused, and makes readers think.

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Developing a Thesis Statement

Many papers you write require developing a thesis statement. In this section you’ll learn what a thesis statement is and how to write one.

Keep in mind that not all papers require thesis statements . If in doubt, please consult your instructor for assistance.

What is a thesis statement?

A thesis statement . . .

Makes an argumentative assertion about a topic; it states the conclusions that you have reached about your topic.
Makes a promise to the reader about the scope, purpose, and direction of your paper.
Is focused and specific enough to be “proven” within the boundaries of your paper.
Is generally located near the end of the introduction ; sometimes, in a long paper, the thesis will be expressed in several sentences or in an entire paragraph.
Identifies the relationships between the pieces of evidence that you are using to support your argument.

Not all papers require thesis statements! Ask your instructor if you’re in doubt whether you need one.

Identify a topic

Your topic is the subject about which you will write. Your assignment may suggest several ways of looking at a topic; or it may name a fairly general concept that you will explore or analyze in your paper.

Consider what your assignment asks you to do

Inform yourself about your topic, focus on one aspect of your topic, ask yourself whether your topic is worthy of your efforts, generate a topic from an assignment.

Below are some possible topics based on sample assignments.

Sample assignment 1

Analyze Spain’s neutrality in World War II.

Identified topic

Franco’s role in the diplomatic relationships between the Allies and the Axis

This topic avoids generalities such as “Spain” and “World War II,” addressing instead on Franco’s role (a specific aspect of “Spain”) and the diplomatic relations between the Allies and Axis (a specific aspect of World War II).

Sample assignment 2

Analyze one of Homer’s epic similes in the Iliad.

The relationship between the portrayal of warfare and the epic simile about Simoisius at 4.547-64.

This topic focuses on a single simile and relates it to a single aspect of the Iliad ( warfare being a major theme in that work).

Developing a Thesis Statement–Additional information

Your assignment may suggest several ways of looking at a topic, or it may name a fairly general concept that you will explore or analyze in your paper. You’ll want to read your assignment carefully, looking for key terms that you can use to focus your topic.

Sample assignment: Analyze Spain’s neutrality in World War II Key terms: analyze, Spain’s neutrality, World War II

After you’ve identified the key words in your topic, the next step is to read about them in several sources, or generate as much information as possible through an analysis of your topic. Obviously, the more material or knowledge you have, the more possibilities will be available for a strong argument. For the sample assignment above, you’ll want to look at books and articles on World War II in general, and Spain’s neutrality in particular.

As you consider your options, you must decide to focus on one aspect of your topic. This means that you cannot include everything you’ve learned about your topic, nor should you go off in several directions. If you end up covering too many different aspects of a topic, your paper will sprawl and be unconvincing in its argument, and it most likely will not fulfull the assignment requirements.

For the sample assignment above, both Spain’s neutrality and World War II are topics far too broad to explore in a paper. You may instead decide to focus on Franco’s role in the diplomatic relationships between the Allies and the Axis , which narrows down what aspects of Spain’s neutrality and World War II you want to discuss, as well as establishes a specific link between those two aspects.

Before you go too far, however, ask yourself whether your topic is worthy of your efforts. Try to avoid topics that already have too much written about them (i.e., “eating disorders and body image among adolescent women”) or that simply are not important (i.e. “why I like ice cream”). These topics may lead to a thesis that is either dry fact or a weird claim that cannot be supported. A good thesis falls somewhere between the two extremes. To arrive at this point, ask yourself what is new, interesting, contestable, or controversial about your topic.

As you work on your thesis, remember to keep the rest of your paper in mind at all times . Sometimes your thesis needs to evolve as you develop new insights, find new evidence, or take a different approach to your topic.

Derive a main point from topic

Once you have a topic, you will have to decide what the main point of your paper will be. This point, the “controlling idea,” becomes the core of your argument (thesis statement) and it is the unifying idea to which you will relate all your sub-theses. You can then turn this “controlling idea” into a purpose statement about what you intend to do in your paper.

Look for patterns in your evidence

Compose a purpose statement.

Consult the examples below for suggestions on how to look for patterns in your evidence and construct a purpose statement.

Franco first tried to negotiate with the Axis
Franco turned to the Allies when he couldn’t get some concessions that he wanted from the Axis

Possible conclusion:

Spain’s neutrality in WWII occurred for an entirely personal reason: Franco’s desire to preserve his own (and Spain’s) power.

Purpose statement

This paper will analyze Franco’s diplomacy during World War II to see how it contributed to Spain’s neutrality.

The simile compares Simoisius to a tree, which is a peaceful, natural image.
The tree in the simile is chopped down to make wheels for a chariot, which is an object used in warfare.

At first, the simile seems to take the reader away from the world of warfare, but we end up back in that world by the end.

This paper will analyze the way the simile about Simoisius at 4.547-64 moves in and out of the world of warfare.

Derive purpose statement from topic

To find out what your “controlling idea” is, you have to examine and evaluate your evidence . As you consider your evidence, you may notice patterns emerging, data repeated in more than one source, or facts that favor one view more than another. These patterns or data may then lead you to some conclusions about your topic and suggest that you can successfully argue for one idea better than another.

For instance, you might find out that Franco first tried to negotiate with the Axis, but when he couldn’t get some concessions that he wanted from them, he turned to the Allies. As you read more about Franco’s decisions, you may conclude that Spain’s neutrality in WWII occurred for an entirely personal reason: his desire to preserve his own (and Spain’s) power. Based on this conclusion, you can then write a trial thesis statement to help you decide what material belongs in your paper.

Sometimes you won’t be able to find a focus or identify your “spin” or specific argument immediately. Like some writers, you might begin with a purpose statement just to get yourself going. A purpose statement is one or more sentences that announce your topic and indicate the structure of the paper but do not state the conclusions you have drawn . Thus, you might begin with something like this:

This paper will look at modern language to see if it reflects male dominance or female oppression.
I plan to analyze anger and derision in offensive language to see if they represent a challenge of society’s authority.

At some point, you can turn a purpose statement into a thesis statement. As you think and write about your topic, you can restrict, clarify, and refine your argument, crafting your thesis statement to reflect your thinking.

As you work on your thesis, remember to keep the rest of your paper in mind at all times. Sometimes your thesis needs to evolve as you develop new insights, find new evidence, or take a different approach to your topic.

Compose a draft thesis statement

If you are writing a paper that will have an argumentative thesis and are having trouble getting started, the techniques in the table below may help you develop a temporary or “working” thesis statement.

Begin with a purpose statement that you will later turn into a thesis statement.

Assignment: Discuss the history of the Reform Party and explain its influence on the 1990 presidential and Congressional election.

Purpose Statement: This paper briefly sketches the history of the grassroots, conservative, Perot-led Reform Party and analyzes how it influenced the economic and social ideologies of the two mainstream parties.

Question-to-Assertion

If your assignment asks a specific question(s), turn the question(s) into an assertion and give reasons why it is true or reasons for your opinion.

Assignment : What do Aylmer and Rappaccini have to be proud of? Why aren’t they satisfied with these things? How does pride, as demonstrated in “The Birthmark” and “Rappaccini’s Daughter,” lead to unexpected problems?

Beginning thesis statement: Alymer and Rappaccinni are proud of their great knowledge; however, they are also very greedy and are driven to use their knowledge to alter some aspect of nature as a test of their ability. Evil results when they try to “play God.”

Write a sentence that summarizes the main idea of the essay you plan to write.

Main idea: The reason some toys succeed in the market is that they appeal to the consumers’ sense of the ridiculous and their basic desire to laugh at themselves.

Make a list of the ideas that you want to include; consider the ideas and try to group them.

nature = peaceful
war matériel = violent (competes with 1?)
need for time and space to mourn the dead
war is inescapable (competes with 3?)

Use a formula to arrive at a working thesis statement (you will revise this later).

although most readers of _______ have argued that _______, closer examination shows that _______.
_______ uses _______ and _____ to prove that ________.
phenomenon x is a result of the combination of __________, __________, and _________.

What to keep in mind as you draft an initial thesis statement

Beginning statements obtained through the methods illustrated above can serve as a framework for planning or drafting your paper, but remember they’re not yet the specific, argumentative thesis you want for the final version of your paper. In fact, in its first stages, a thesis statement usually is ill-formed or rough and serves only as a planning tool.

As you write, you may discover evidence that does not fit your temporary or “working” thesis. Or you may reach deeper insights about your topic as you do more research, and you will find that your thesis statement has to be more complicated to match the evidence that you want to use.

You must be willing to reject or omit some evidence in order to keep your paper cohesive and your reader focused. Or you may have to revise your thesis to match the evidence and insights that you want to discuss. Read your draft carefully, noting the conclusions you have drawn and the major ideas which support or prove those conclusions. These will be the elements of your final thesis statement.

Sometimes you will not be able to identify these elements in your early drafts, but as you consider how your argument is developing and how your evidence supports your main idea, ask yourself, “ What is the main point that I want to prove/discuss? ” and “ How will I convince the reader that this is true? ” When you can answer these questions, then you can begin to refine the thesis statement.

Refine and polish the thesis statement

To get to your final thesis, you’ll need to refine your draft thesis so that it’s specific and arguable.

Ask if your draft thesis addresses the assignment
Question each part of your draft thesis
Clarify vague phrases and assertions
Investigate alternatives to your draft thesis

Consult the example below for suggestions on how to refine your draft thesis statement.

Sample Assignment

Choose an activity and define it as a symbol of American culture. Your essay should cause the reader to think critically about the society which produces and enjoys that activity.

Ask The phenomenon of drive-in facilities is an interesting symbol of american culture, and these facilities demonstrate significant characteristics of our society.This statement does not fulfill the assignment because it does not require the reader to think critically about society.

Drive-ins are an interesting symbol of American culture because they represent Americans’ significant creativity and business ingenuity.

Among the types of drive-in facilities familiar during the twentieth century, drive-in movie theaters best represent American creativity, not merely because they were the forerunner of later drive-ins and drive-throughs, but because of their impact on our culture: they changed our relationship to the automobile, changed the way people experienced movies, and changed movie-going into a family activity.

While drive-in facilities such as those at fast-food establishments, banks, pharmacies, and dry cleaners symbolize America’s economic ingenuity, they also have affected our personal standards.

While drive-in facilities such as those at fast- food restaurants, banks, pharmacies, and dry cleaners symbolize (1) Americans’ business ingenuity, they also have contributed (2) to an increasing homogenization of our culture, (3) a willingness to depersonalize relationships with others, and (4) a tendency to sacrifice quality for convenience.

This statement is now specific and fulfills all parts of the assignment. This version, like any good thesis, is not self-evident; its points, 1-4, will have to be proven with evidence in the body of the paper. The numbers in this statement indicate the order in which the points will be presented. Depending on the length of the paper, there could be one paragraph for each numbered item or there could be blocks of paragraph for even pages for each one.

Complete the final thesis statement

The bottom line.

As you move through the process of crafting a thesis, you’ll need to remember four things:

Context matters! Think about your course materials and lectures. Try to relate your thesis to the ideas your instructor is discussing.
As you go through the process described in this section, always keep your assignment in mind . You will be more successful when your thesis (and paper) responds to the assignment than if it argues a semi-related idea.
Your thesis statement should be precise, focused, and contestable ; it should predict the sub-theses or blocks of information that you will use to prove your argument.
Make sure that you keep the rest of your paper in mind at all times. Change your thesis as your paper evolves, because you do not want your thesis to promise more than your paper actually delivers.

In the beginning, the thesis statement was a tool to help you sharpen your focus, limit material and establish the paper’s purpose. When your paper is finished, however, the thesis statement becomes a tool for your reader. It tells the reader what you have learned about your topic and what evidence led you to your conclusion. It keeps the reader on track–well able to understand and appreciate your argument.

three characteristics of a strong thesis statement

Writing Process and Structure

This is an accordion element with a series of buttons that open and close related content panels.

Getting Started with Your Paper

Interpreting Writing Assignments from Your Courses

Generating Ideas for

Creating an Argument

Thesis vs. Purpose Statements

Architecture of Arguments

Working with Sources

Quoting and Paraphrasing Sources

Using Literary Quotations

Citing Sources in Your Paper

Drafting Your Paper

Generating Ideas for Your Paper

Introductions

Paragraphing

Developing Strategic Transitions

Conclusions

Revising Your Paper

Peer Reviews

Reverse Outlines

Revising an Argumentative Paper

Revision Strategies for Longer Projects

Finishing Your Paper

Twelve Common Errors: An Editing Checklist

How to Proofread your Paper

Writing Collaboratively

Collaborative and Group Writing

What are your chances of acceptance?

Calculate for all schools, your chance of acceptance.

Your chancing factors

Extracurriculars.

How to Write a Strong Thesis Statement: 4 Steps + Examples

What’s Covered:

What is the purpose of a thesis statement, writing a good thesis statement: 4 steps, common pitfalls to avoid, where to get your essay edited for free.

When you set out to write an essay, there has to be some kind of point to it, right? Otherwise, your essay would just be a big jumble of word salad that makes absolutely no sense. An essay needs a central point that ties into everything else. That main point is called a thesis statement, and it’s the core of any essay or research paper.

You may hear about Master degree candidates writing a thesis, and that is an entire paper–not to be confused with the thesis statement, which is typically one sentence that contains your paper’s focus.

Read on to learn more about thesis statements and how to write them. We’ve also included some solid examples for you to reference.

Typically the last sentence of your introductory paragraph, the thesis statement serves as the roadmap for your essay. When your reader gets to the thesis statement, they should have a clear outline of your main point, as well as the information you’ll be presenting in order to either prove or support your point.

The thesis statement should not be confused for a topic sentence , which is the first sentence of every paragraph in your essay. If you need help writing topic sentences, numerous resources are available. Topic sentences should go along with your thesis statement, though.

Since the thesis statement is the most important sentence of your entire essay or paper, it’s imperative that you get this part right. Otherwise, your paper will not have a good flow and will seem disjointed. That’s why it’s vital not to rush through developing one. It’s a methodical process with steps that you need to follow in order to create the best thesis statement possible.

Step 1: Decide what kind of paper you’re writing

When you’re assigned an essay, there are several different types you may get. Argumentative essays are designed to get the reader to agree with you on a topic. Informative or expository essays present information to the reader. Analytical essays offer up a point and then expand on it by analyzing relevant information. Thesis statements can look and sound different based on the type of paper you’re writing. For example:

Argumentative: The United States needs a viable third political party to decrease bipartisanship, increase options, and help reduce corruption in government.
Informative: The Libertarian party has thrown off elections before by gaining enough support in states to get on the ballot and by taking away crucial votes from candidates.
Analytical: An analysis of past presidential elections shows that while third party votes may have been the minority, they did affect the outcome of the elections in 2020, 2016, and beyond.

Step 2: Figure out what point you want to make

Once you know what type of paper you’re writing, you then need to figure out the point you want to make with your thesis statement, and subsequently, your paper. In other words, you need to decide to answer a question about something, such as:

What impact did reality TV have on American society?
How has the musical Hamilton affected perception of American history?
Why do I want to major in [chosen major here]?

If you have an argumentative essay, then you will be writing about an opinion. To make it easier, you may want to choose an opinion that you feel passionate about so that you’re writing about something that interests you. For example, if you have an interest in preserving the environment, you may want to choose a topic that relates to that.

If you’re writing your college essay and they ask why you want to attend that school, you may want to have a main point and back it up with information, something along the lines of:

“Attending Harvard University would benefit me both academically and professionally, as it would give me a strong knowledge base upon which to build my career, develop my network, and hopefully give me an advantage in my chosen field.”

Step 3: Determine what information you’ll use to back up your point

Once you have the point you want to make, you need to figure out how you plan to back it up throughout the rest of your essay. Without this information, it will be hard to either prove or argue the main point of your thesis statement. If you decide to write about the Hamilton example, you may decide to address any falsehoods that the writer put into the musical, such as:

“The musical Hamilton, while accurate in many ways, leaves out key parts of American history, presents a nationalist view of founding fathers, and downplays the racism of the times.”

Once you’ve written your initial working thesis statement, you’ll then need to get information to back that up. For example, the musical completely leaves out Benjamin Franklin, portrays the founding fathers in a nationalist way that is too complimentary, and shows Hamilton as a staunch abolitionist despite the fact that his family likely did own slaves.

Step 4: Revise and refine your thesis statement before you start writing

Read through your thesis statement several times before you begin to compose your full essay. You need to make sure the statement is ironclad, since it is the foundation of the entire paper. Edit it or have a peer review it for you to make sure everything makes sense and that you feel like you can truly write a paper on the topic. Once you’ve done that, you can then begin writing your paper.

When writing a thesis statement, there are some common pitfalls you should avoid so that your paper can be as solid as possible. Make sure you always edit the thesis statement before you do anything else. You also want to ensure that the thesis statement is clear and concise. Don’t make your reader hunt for your point. Finally, put your thesis statement at the end of the first paragraph and have your introduction flow toward that statement. Your reader will expect to find your statement in its traditional spot.

If you’re having trouble getting started, or need some guidance on your essay, there are tools available that can help you. CollegeVine offers a free peer essay review tool where one of your peers can read through your essay and provide you with valuable feedback. Getting essay feedback from a peer can help you wow your instructor or college admissions officer with an impactful essay that effectively illustrates your point.

How to write a thesis statement + examples

What is a thesis statement?

Is a thesis statement a question, how do you write a good thesis statement, how do i know if my thesis statement is good, examples of thesis statements, helpful resources on how to write a thesis statement, frequently asked questions about writing a thesis statement, related articles.

A thesis statement is the main argument of your paper or thesis.

The thesis statement is one of the most important elements of any piece of academic writing . It is a brief statement of your paper’s main argument. Essentially, you are stating what you will be writing about.

You can see your thesis statement as an answer to a question. While it also contains the question, it should really give an answer to the question with new information and not just restate or reiterate it.

Your thesis statement is part of your introduction. Learn more about how to write a good thesis introduction in our introduction guide .

A thesis statement is not a question. A statement must be arguable and provable through evidence and analysis. While your thesis might stem from a research question, it should be in the form of a statement.

Tip: A thesis statement is typically 1-2 sentences. For a longer project like a thesis, the statement may be several sentences or a paragraph.

A good thesis statement needs to do the following:

Condense the main idea of your thesis into one or two sentences.
Answer your project’s main research question.
Clearly state your position in relation to the topic .
Make an argument that requires support or evidence.

Once you have written down a thesis statement, check if it fulfills the following criteria:

Your statement needs to be provable by evidence. As an argument, a thesis statement needs to be debatable.
Your statement needs to be precise. Do not give away too much information in the thesis statement and do not load it with unnecessary information.
Your statement cannot say that one solution is simply right or simply wrong as a matter of fact. You should draw upon verified facts to persuade the reader of your solution, but you cannot just declare something as right or wrong.

As previously mentioned, your thesis statement should answer a question.

If the question is:

What do you think the City of New York should do to reduce traffic congestion?

A good thesis statement restates the question and answers it:

In this paper, I will argue that the City of New York should focus on providing exclusive lanes for public transport and adaptive traffic signals to reduce traffic congestion by the year 2035.

Here is another example. If the question is:

How can we end poverty?

A good thesis statement should give more than one solution to the problem in question:

In this paper, I will argue that introducing universal basic income can help reduce poverty and positively impact the way we work.

The Writing Center of the University of North Carolina has a list of questions to ask to see if your thesis is strong .

A thesis statement is part of the introduction of your paper. It is usually found in the first or second paragraph to let the reader know your research purpose from the beginning.

In general, a thesis statement should have one or two sentences. But the length really depends on the overall length of your project. Take a look at our guide about the length of thesis statements for more insight on this topic.

Here is a list of Thesis Statement Examples that will help you understand better how to write them.

Every good essay should include a thesis statement as part of its introduction, no matter the academic level. Of course, if you are a high school student you are not expected to have the same type of thesis as a PhD student.

Here is a great YouTube tutorial showing How To Write An Essay: Thesis Statements .

Want to create or adapt books like this? Learn more about how Pressbooks supports open publishing practices.

Chapter 5: Putting the Pieces Together with a Thesis Statement

5.2 Developing a Strong, Clear Thesis Statement

Learning Objectives

Develop a strong, clear thesis statement with the proper elements
Revise your thesis statement

Have you ever known someone who was not very good at telling stories? You probably had trouble following the train of thought as the storyteller jumped from point to point, either being too brief in places that needed further explanation or providing too many details on a meaningless element. Maybe the person told the end of the story first, then moved to the beginning and later added details to the middle. The ideas were probably scattered, and the story did not flow very well. When the story was over, you probably had many questions.

Elements of a Thesis Statement

Remember that a thesis is not the topic itself, but rather your interpretation of the question or subject. For whatever topic your instructor gives you, you must ask yourself, “What do I want to say about it?” Asking and then answering this question is vital to forming a thesis that is precise, forceful, and confident.

A Strong Thesis Statement

A strong thesis statement contains the following qualities:

Specificity: A thesis statement must concentrate on a specific area of a general topic. As you may recall, the creation of a thesis statement begins when you choose a broad subject and then narrow down its parts until you pinpoint a specific aspect of that topic. For example, health care is a broad topic, but a proper thesis statement would focus on a specific area of that topic, such as options for individuals without health care coverage.

Precision: A strong thesis statement must be precise enough to allow for a coherent argument and to remain focused on the topic. If the specific topic is options for individuals without health care coverage, then your precise thesis statement must make an exact claim about it, such as that limited options exist for those who are uninsured by their employers. You must further pinpoint what you are going to discuss regarding these limited effects, such as whom they affect and what the cause is.

Arguability: A thesis statement must present a relevant and specific argument. A factual statement often is not considered arguable. Be sure your thesis statement contains a point of view that can be supported with evidence.

Demonstrability: For any claim you make in your thesis, you must be able to provide reasons and examples for your opinion. You can rely on personal observations in order to do this, or you can consult outside sources to demonstrate that what you assert is valid. A worthy argument is backed by examples and details.

Forcefulness/Assertiveness: A thesis statement that is forceful shows readers that you are, in fact, making an argument. The tone is assertive and takes a stance that others might oppose.

Confidence: In addition to using force in your thesis statement, you must also use confidence in your claim. Phrases such as I feel or I believe actually weaken the readers’ sense of your confidence because these phrases imply that you are the only person who feels the way you do. In other words, your stance has insufficient backing. Taking an authoritative stance on the matter persuades your readers to have faith in your argument and open their minds to what you have to say.

Self-Practice Exercise 5.4

H5P: Drafting Thesis StatementsWrite a clear, confident thesis statement for an essay on the following topic:

Texting while driving.
The legal drinking age in different provinces of Canada.
Steroid use among professional athletes.

Examples of Appropriate Thesis Statements

Each of the following thesis statements meets several of the qualities discussed above: specificity, precision, arguability, demonstrability, forcefulness/assertiveness, and confidence.

The societal and personal struggles of Floyd in the play Where the Blood Mixes, by Kevin Loring, symbolize the challenge of First Nations people of Canada who lived through segregation and placement into residential schools.
Closing all American borders for a period of five years is one solution that will tackle illegal immigration.
Shakespeare’s use of dramatic irony in Romeo and Juliet spoils the outcome for the audience and weakens the plot.
J. D. Salinger’s character in Catcher in the Rye, Holden Caulfield, is a confused rebel who voices his disgust with phonies, yet in an effort to protect himself, he acts like a phony on many occasions.
Compared to an absolute divorce, no-fault divorce is less expensive, promotes fairer settlements, and reflects a more realistic view of the causes for marital breakdown.
Exposing children from an early age to the dangers of drug abuse is a sure method of preventing future drug addicts.
In today’s crumbling job market, a high school diploma is not significant enough education to land a stable, lucrative job.

Now that you have read about the contents of a good thesis statement and have seen examples, take a look four pitfalls to avoid when composing your own thesis.

A thesis is weak when it is simply a declaration of your subject or a description of what you will discuss in your essay. Weak thesis statement: My paper will explain why imagination is more important than knowledge.
A thesis is weak when it makes an unreasonable or outrageous claim or insults the opposing side. Weak thesis statement: Religious radicals across the country are trying to legislate their puritanical beliefs by banning required high school books.
A thesis is weak when it contains an obvious fact or something that no one can disagree with or provides a dead end. Weak thesis statement: Advertising companies use sex to sell their products.
A thesis is weak when the statement is too broad. Weak thesis statement : The life of Pierre Trudeau was long and accomplished.

Self-Practice Exercise 5.5

H5P: Read the following thesis statements and identify each as weak or strong.

“The subject of this paper is my experience with ferrets as pets.”
“The government must expand its funding for research on renewable energy resources in order to prepare for the impending end of oil.”
“Edgar Allan Poe was a poet who lived in Baltimore during the 19th century.”
“In this essay, I will give you a lot of reasons why marijuana should not be legalized in British Columbia.”
“Because many children’s toys have potential safety hazards that could lead to injury, it is clear that not all children’s toys are safe.”
“My experience with young children has taught me that I want to be a disciplinary parent because I believe that a child without discipline can be a parent’s worst nightmare.”

Writing at Work

Often in your career, you will need to ask your boss for something through an email. Just as a thesis statement organizes an essay, it can also organize your email request. While your email will be shorter than an essay, using a thesis statement in your first paragraph quickly lets your boss know what you are asking for, why it is necessary, and what the benefits are. In short body paragraphs, you can provide the essential information needed to expand upon your request.

Writing a Thesis Statement

One legitimate question readers always ask about a piece of writing is “What is the big idea?” (You may even ask this question when you are the reader, critically reading an assignment or another document.) Every nonfiction writing task—from the short essay to the 10-page term paper to the lengthy senior thesis—needs a big idea, or a controlling idea, as the “spine” for the work. The controlling idea is the main idea that you want to present and develop.

The big idea, or controlling idea, you want to present in an essay is expressed in your thesis statement. Remember that a thesis statement is often one sentence long, and it states your point of view. The thesis statement is not the topic of the piece of writing but rather what you have to say about that topic and what is important to tell readers.

Look at Table 5.1: Topics and Thesis Statements for a comparison of topics and thesis statements.

Table 5.1 Topics and Thesis Statements: A Comparison
Topic	Thesis Statement
Music piracy	The recording industry fears that so-called music piracy will diminish profits and destroy markets, but it cannot be more wrong.
The number of consumer choices available in media gear	Everyone wants the newest and the best digital technology, but the choices are extensive, and the specifications are often confusing.
E-books and online newspapers increasing their share of the market	E-books and online newspapers will bring an end to print media as we know it.
Online education and the new media	Someday, students and teachers will send avatars to their online classrooms.

The first thesis statement you write will be a preliminary thesis statement , or a working thesis statement . You will need it when you begin to outline your assignment as a way to organize it. As you continue to develop the arrangement, you can limit your working thesis statement if it is too broad or expand it if it proves too narrow for what you want to say.

Self-Practice Exercise 5.6

H5P: Working Toward a Working Thesis

We’re going to use that free writing strategy again. This time, try to write for ten minutes, and write down anything you know right now about your newly narrowed thesis statement. Don’t worry about looking material up or whether you’re getting everything exactly right. Instead, just focus on getting words on the screen. This is rough work to help you approach an answer to a question, not the final essay. So just keep writing.

Can you find something in your freewriting that looks like a “controlling idea”? Something that might centre your argument, something you can structure your argument around? We’ll call that your working thesis. Draft a working thesis below.

Collaboration: Please share with a classmate and compare your answers.

Revising a Thesis Statement

Your thesis will probably change as you write, so you will need to modify it to reflect exactly what you have discussed in your essay. Remember, you begin with a working thesis statement, an indefinite statement that you make about your topic early in the writing process for the purpose of planning and guiding your writing.

You can cut down on irrelevant aspects and revise your thesis by taking the following steps:

Working thesis: Young people have to work hard to succeed in life.
Revised thesis: Recent college graduates must have discipline and persistence in order to find and maintain a stable job in which they can use and be appreciated for their talents.
Working thesis: The welfare system is a joke.
Revised thesis: The welfare system keeps a socioeconomic class from gaining employment by alluring members of that class with unearned income, instead of programs to improve their education and skill sets.
Working thesis: British Columbian schoolteachers are not paid enough.
Revised thesis: The legislature of British Columbia cannot afford to pay its educators, resulting in job cuts and resignations in a district that sorely needs highly qualified and dedicated teachers.

The linking verb in this working thesis statement is the word are. Linking verbs often make thesis statements weak because they do not express action. Reading the original thesis statement above, readers might wonder why teachers are not paid enough, but the statement does not compel them to ask many more questions. The writer should ask him- or herself questions in order to replace the linking verb with an action verb, thus forming a stronger thesis statement, one that takes a more definitive stance on the issue. For example, the writer could ask:

Who is not paying the teachers enough?
What is considered “enough”?
What is the problem?
What are the results
Working thesis: Today’s teenage girls are too sexualized.
Which teenage girls?
What constitutes “too” sexualized?
Why are they behaving that way?
Where does this behaviour show up?
What are the repercussions?

Self-practice exercise 5.7

H5P: Polishing the Thesis Statement

A working thesis statement is always a work in progress, and we make it stronger by asking questions of it and challenging the first draft. That’s the next job you have! It takes many revisions to make your work the best it can be, so try not to get frustrated by the process.

Copy your working thesis statement for reference here.
Pinpoint and replace all nonspecific words, such as people, everything, society, or life, with more precise words in order to reduce any vagueness. Recopy the newly revised thesis below.
Replace any linking verbs with action verbs. Linking verbs gives information about the subject, such as a condition or relationship (is, appear, smell, sound), but they do not show any action. The most common linking verb is any forms of the verb to be, a verb that simply states that a situation exists. Recopy the newly revised thesis below.
Omit any general claims that are hard to support. Recopy the newly revised thesis below.

Just Asking Questions

Clarify ideas that need explanation by asking yourself questions that narrow your thesis. The most straightforward way to do this is to ask yourself the 5WHs again — who, what, where, when, why, and how — and see were you can make your thesis statement more specific. List the questions you have about your own thesis below.

Now do your best to answer those questions.

And finally, revise your thesis in relation to these points and share it below.

In your career you may have to write a project proposal that focuses on a particular problem in your company, such as reinforcing the tardiness policy. The proposal would aim to fix the problem; using a thesis statement would clearly state the boundaries of the problem and the goals of the project. After writing the proposal, you may find that the thesis needs revising to reflect exactly what is expressed in the body. The techniques from this chapter would apply to revising that thesis.

Key Takeaways

Proper essays require a thesis statement to provide a specific focus and suggest how the essay will be organized.
A thesis statement is your interpretation of the subject, not the topic itself.
A strong thesis is specific, precise, forceful, confident, and is able to be demonstrated.
A strong thesis challenges readers with a point of view that can be debated and supported with evidence.
A weak thesis is simply a declaration of your topic or contains an obvious fact that cannot be argued.
Depending on your topic, it may or may not be appropriate to use first person point of view.
Revise your thesis by ensuring all words are specific, all ideas are exact, and all verbs express action.

Writing for Success - 1st Canadian H5P Edition Copyright © 2021 by Tara Horkoff is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License , except where otherwise noted.

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The thesis statement or main claim must be debatable

An argumentative or persuasive piece of writing must begin with a debatable thesis or claim. In other words, the thesis must be something that people could reasonably have differing opinions on. If your thesis is something that is generally agreed upon or accepted as fact then there is no reason to try to persuade people.

Example of a non-debatable thesis statement:

This thesis statement is not debatable. First, the word pollution implies that something is bad or negative in some way. Furthermore, all studies agree that pollution is a problem; they simply disagree on the impact it will have or the scope of the problem. No one could reasonably argue that pollution is unambiguously good.

Example of a debatable thesis statement:

This is an example of a debatable thesis because reasonable people could disagree with it. Some people might think that this is how we should spend the nation's money. Others might feel that we should be spending more money on education. Still others could argue that corporations, not the government, should be paying to limit pollution.

Another example of a debatable thesis statement:

In this example there is also room for disagreement between rational individuals. Some citizens might think focusing on recycling programs rather than private automobiles is the most effective strategy.

The thesis needs to be narrow

Although the scope of your paper might seem overwhelming at the start, generally the narrower the thesis the more effective your argument will be. Your thesis or claim must be supported by evidence. The broader your claim is, the more evidence you will need to convince readers that your position is right.

Example of a thesis that is too broad:

There are several reasons this statement is too broad to argue. First, what is included in the category "drugs"? Is the author talking about illegal drug use, recreational drug use (which might include alcohol and cigarettes), or all uses of medication in general? Second, in what ways are drugs detrimental? Is drug use causing deaths (and is the author equating deaths from overdoses and deaths from drug related violence)? Is drug use changing the moral climate or causing the economy to decline? Finally, what does the author mean by "society"? Is the author referring only to America or to the global population? Does the author make any distinction between the effects on children and adults? There are just too many questions that the claim leaves open. The author could not cover all of the topics listed above, yet the generality of the claim leaves all of these possibilities open to debate.

Example of a narrow or focused thesis:

In this example the topic of drugs has been narrowed down to illegal drugs and the detriment has been narrowed down to gang violence. This is a much more manageable topic.

We could narrow each debatable thesis from the previous examples in the following way:

Narrowed debatable thesis 1:

This thesis narrows the scope of the argument by specifying not just the amount of money used but also how the money could actually help to control pollution.

Narrowed debatable thesis 2:

This thesis narrows the scope of the argument by specifying not just what the focus of a national anti-pollution campaign should be but also why this is the appropriate focus.

Qualifiers such as " typically ," " generally ," " usually ," or " on average " also help to limit the scope of your claim by allowing for the almost inevitable exception to the rule.

Types of claims

Claims typically fall into one of four categories. Thinking about how you want to approach your topic, or, in other words, what type of claim you want to make, is one way to focus your thesis on one particular aspect of your broader topic.

Claims of fact or definition: These claims argue about what the definition of something is or whether something is a settled fact. Example:

Claims of cause and effect: These claims argue that one person, thing, or event caused another thing or event to occur. Example:

Claims about value: These are claims made of what something is worth, whether we value it or not, how we would rate or categorize something. Example:

Claims about solutions or policies: These are claims that argue for or against a certain solution or policy approach to a problem. Example:

Which type of claim is right for your argument? Which type of thesis or claim you use for your argument will depend on your position and knowledge of the topic, your audience, and the context of your paper. You might want to think about where you imagine your audience to be on this topic and pinpoint where you think the biggest difference in viewpoints might be. Even if you start with one type of claim you probably will be using several within the paper. Regardless of the type of claim you choose to utilize it is key to identify the controversy or debate you are addressing and to define your position early on in the paper.

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Topic Sentences

Thesis Statements

A thesis statement is a sentence (sometimes more than one sentence) in the introduction that tells the reader the following information:

What the topic of the paper is
How the writer intends to discuss that topic
It gives a blueprint for how the essay will be structured
How the writer intends to prove or demonstrate his or her main points.

Think of your paper as a human body, and your thesis statement as the spinal cord. Without it, there is no structure.

For you as the writer, the thesis statement:

Develops through the interrelationship of thinking, reading, and writing;

Limits your research by providing you with one controlling main idea that intrigues you;

Narrows your writing to one specific claim that you can develop or prove;

Organizes your ideas so you know the important points you want to make in your paper; and

Clarifies your writing by keeping you on target to fulfill your proposed purpose.

For your readers, the thesis statement:

Identifies the main point and sub-points of your essay clearly and quickly;

Functions as a road map so your readers can easily follow your ideas; and

Gives satisfaction at the conclusion of the paper when your readers discover you have fulfilled your promise by proving or developing your main point.

Characteristics of Effective Thesis Statements

An effective thesis statement must be factual and narrow.

An effective thesis statement prepares readers for facts and details, but it cannot itself be a fact. It must always be an inference that demands proof or further development. These proofs come from the literature.

UNT Dallas campus has two buildings.

Not factual enough: The UNT Dallas campus is the perfect size.

Just Right: While some might see small universities as a disadvantage, the small campus of UNT Dallas holds many advantages for students, including a close-knit campus community, smaller class sizes, and better support from professors.

2. Narrow Topic

A good thesis should be narrow, and not too broad or too vague. If the topic is too broad, you won’t be able to cover the entire topic in your paper. If it’s too narrow, you might not be able to find research, and your paper probably won’t be long enough.

Too Broad: College students have a lot of responsibilities.

Too Narrow: Student workers in the Learning Commons at UNT Dallas have many responsibilities in their course work and tutoring.

Just Right: College students who are financially independent have many responsibilities as they must maintain good grades, pay living expenses, and balance work and school.

Remember, a thesis statement is not:

Instead , you should argue, based on facts and literature, why or why not NASA should receive more funding.
Ask yourself--can I find anything in literature to prove this point, or is this MY opinion?
Instead, you should argue why or why not people like chocolate OR why or why not chocolate is healthy for you based on facts and literature findings.
Similar to the subjective opinion, ask yourself is this statement is based on facts and literature findings or if this is YOUR opinion. Although it is ok to have your own opinion, professors usually do not like to read articles about beliefs (students have been writing about these for years and years).
Instead, you could discuss theories about politics or religions and use literature to prove or disprove those theories.
This is too factual (the Himalayas WERE formed from a collision of tectonic plates), and there is nothing to discuss because this IS a fact in itself.
Instead, you could compare and contrast the tectonic plate formation of different mountains.

Examples of Thesis Statements

A thesis statement f or a 5 paragraph essay conta ins three parts:.

1. A Topic: the main idea of the essay

2. The Controlling Idea: what you want to say about the topic

3. The subtopics: usually 3 examples/reasons you will discuss in your paper

Here is an example of a thesis statement.

Ex: Regularly visiting the Writing Center at UNT Dallas will help you become the best writer on the planet because it offers superhero tutors, current technology, and fantastic handouts.

The main topic explores the idea that regularly vsiting the writing center will help you become the best writer on the planet, and the subtopics further expand this opinion with three distinct examples: 1) tutors, 2) technology, and 3) the handouts.

Outline Example

The paper should be organized around the subtopics. For example, for the thesis written above, the writer would write one body paragraph about the tutors, one about technology, and one about the handouts.

Here is a sample essay outline based on this thesis:

Introduce the topic of tutoring
Thesis (last sentence of intro): Regularly visiting the Writing Center at UNT Dallas will help you become the best writer on the planet because it offers superhero tutors, current technology, and fantastic handouts.
topic sentence
Restate thesis
Concluding remarks

For further assistance with the structure, see our handouts on Introductions and Conclusions and Topic Sentences.

A thesis statement for a LONG ESSAY contains two parts: A Topic: the main idea of the essay The Controlling Idea: what you want to say about the topic

Throughout the paper, your thesis promises your readers that you will prove specific facts or develop certain ideas ; therefore, every paragraph, sentence, and word in your paper must relate to this controlling idea.

Here are some examples of thesis statements.

Baseball, once a national pastime and even an addiction, has lost its popularity because of the new interest in more violent sports.
Since the space program has yet to provide the American people with any substantial, practical returns, it is a waste of money and should be dissolved.
To stop the alarming rise in the number of violent crimes committed every year, our courts must hand out tougher sentences.
Detective stories appeal to the basic human desire for thrills.
Hemingway's war stories helped to create a new prose style.
Bronte utilizes light and fire to symbolize the emotional expressions of the characters.

Here is a suggested outline for a long essay and how that would look in terms of your thesis statement, topic, and controlling ideas:

Introduce the novel Jane Eyre and the topic of symbolism
Thesis (last sentence of intro): Bronte utilizes light and fire to symbolize the emotional expressions of the characters.
textual examples and elaboration

Writing Studio

How do i write a thesis statement.

This page is Part 1 of a two-part handout that continues with our Thesis Statement Checklist .

What is a Thesis Statement?

In an effort to make our handouts more accessible, we have begun converting our PDF handouts to web pages. Download this page as a PDF: See p. 1 of How Do I Write a Thesis Statement Return to Writing Studio Handouts

A thesis statement is a very specific argument that guides your paper. Generally, a thesis statement consists of two parts :

A clearly identifiable topic or subject matter
A succinct summary of what you have to say about that topic

For your reader, a thesis functions like the case a lawyer has to make to the judge and jury in a courtroom. An effective thesis statement explains to your reader the case you are going to make and how you are going to make it.

For you as the author, your thesis can also help you to stay focused as a writer and determine what information you do (and don’t) need to include in your analysis.

Traditionally, the thesis statement is found near the end of your introduction , though this may change depending on the assignment and context. Don’t be afraid to draft a thesis statement that is more than one sentence.

A Note on Writing Process

You do not need a perfect thesis statement before you draft the rest of the paper. In fact, you will likely need to modify your thesis once you have a complete draft to make sure that your draft and your thesis match one another. If your argument evolves in productive ways as you write, your thesis should, too.

Honing and tweaking a thesis statement during the revision process is ultimately more important than having it exact and precise during the drafting process.

Characteristics of a WEAK thesis statement

Vague: Raises an interesting topic or question but doesn’t specify an argument
Offers plot summary, statement of fact, or obvious truths instead of an argument
Offers opinion or conjecture rather than an argument (cannot be proven with textual evidence)
Is too broad or too complex for the length of the paper
Uses meaningful-sounding words, but doesn’t actually say anything of substance

Disclaimer: This is not a complete list! You can probably think of many more characteristics of a weak thesis statement.

Characteristics of a STRONG thesis statement

Answers a specific question
Takes a distinct position on the topic
Is debatable (a reasonable person could argue an alternative position)
Appropriately focused for the page length of the assignment
Allows your reader to anticipate the organization of your argument

Having trouble drafting a thesis? Try filling in the blanks in these template statements:

In this paper, I argue that _____, because/by _____.
While critics argue _____, I argue _____, because _____.
By looking at _____, I argue that _____, which is important because _____.
The text, _____, defines _____ as _____, in order to argue _____.

Disclaimer: These are only models. They’ll be useful to help you to get started, but you’ll have to do quite a bit of tweaking before your thesis is ready for your paper.

For more on thesis statements, check out part 2: Our Thesis Statement Checklist .

Last revised: 07/15/2008 | Adapted for web delivery: 5/2021

In order to access certain content on this page, you may need to download Adobe Acrobat Reader or an equivalent PDF viewer software.

Thesis Sentences

Characteristics of a strong thesis.

What makes a strong thesis in a college essay?

A strong thesis is non-obvious . High school teachers needed to make sure that you and all your classmates mastered the basic form of the academic essay. Thus, they were mostly concerned that you had a clear and consistent thesis, even if it was something obvious such as “sustainability is important.” A thesis statement like that has a wide-enough scope to incorporate several supporting points and concurring evidence, enabling the writer to demonstrate his or her mastery of a basic essay format. College instructors, though, fully expect you to produce something more developed.
A strong thesis is arguable . In everyday life, “arguable” is often used as a synonym for “doubtful.” For a thesis, though, “arguable” means that it’s worth arguing: it’s something with which a reasonable person might disagree. This arguability criterion dovetails with the non-obvious one: it shows that the author has deeply explored a problem and arrived at an argument that legitimately needs 3, 5, 10, or 20 pages to explain and justify. In that way, a good thesis sets an ambitious agenda for an essay. A thesis such as “sustainability is important” isn’t at all difficult to argue for, and the reader would have little intrinsic motivation to read the rest of the paper. However, an arguable thesis such as “sustainability policies will inevitably fail if they do not incorporate social justice,” brings up some healthy skepticism. Thus, the arguable thesis makes the reader want to keep reading.
A strong thesis is well specified . Some student writers fear that they’re being too obvious if they specify their thesis early in the essay; they think that a purposefully vague thesis might be more intriguing to the reader. However, consider movie trailers: they always include the most exciting and poignant moments from the film to attract an audience. In academic essays, too, a well specified thesis indicates that the author has thought rigorously about an issue and done thorough research, which makes the reader want to keep reading. Don’t just say that a particular policy is effective or fair; say what makes it is so. If you want to argue that a particular claim is dubious or incomplete, say why in your thesis.
A strong thesis is supportable . The angle in your thesis should be able to be supported with examples, details, facts, observations, and other types of evidence, including research as appropriate.
A strong thesis includes implications . Suppose your assignment is to write an essay about some aspect of the history of linen production and trade, a topic that may seem exceedingly arcane. And suppose you have constructed a well supported and creative argument that linen was so widely traded in the ancient Mediterranean that it actually served as a kind of currency. [1] That’s a strong, insightful, arguable, well specified thesis. But which of these thesis statements do you find more engaging?

Version A: Linen served as a form of currency in the ancient Mediterranean world, connecting rival empires through circuits of trade. Version B: Linen served as a form of currency in the ancient Mediterranean world, connecting rival empires through circuits of trade. The economic role of linen raises important questions about how shifting environmental conditions can influence economic relationships and, by extension, political conflicts.

Strong thesis sentences have angles that are arguable, well-specified, and supportable. Not all topics and angles lend themselves to implications. However, if you’ve chosen a topic and created an angle that allows you to put your claims into a broader context, that additional context and its implications can create additional interest in an essay.

H ow do you produce a good, strong thesis? And how do you know when you’ve gotten there? Many instructors and writers find useful a metaphor based on this passage by Oliver Wendell Holmes, Sr. [2] :

There are one-story intellects, two-story intellects, and three-story intellects with skylights. All fact collectors who have no aim beyond their facts are one-story men. Two-story men compare, reason, generalize using the labor of fact collectors as their own. Three-story men idealize, imagine, predict—their best illumination comes from above the skylight.

Looking up from below the corner of a Japanese temple, so that three levels of red eaves, capped by black gutters, are arranged in a strong vertical point

The biggest benefit of the three-story metaphor is that it describes a process for building a thesis. To build the first story, you first have to get familiar with the complex, relevant facts surrounding the problem or question. You have to be able to describe the situation thoroughly and accurately. Then, with that first story built, you can layer on the second story by formulating the insightful, arguable point that animates the analysis. That’s often the most effortful part: brainstorming, elaborating and comparing alternative ideas, finalizing your point. With that specified, you can frame the third story by articulating why the point you make matters beyond its particular topic or case.

For example, imagine you have been assigned an essay about the impact of online learning in higher education. You would first construct an account of the origins and multiple forms of online learning and assess research findings about its use and effectiveness. If you’ve done that well, you’ll probably come up with a well considered opinion that wouldn’t be obvious to readers who haven’t looked at the issue in depth. Maybe you’ll want to argue that online learning is a threat to the academic community. Or perhaps you’ll want to make the case that online learning opens up pathways to college degrees that traditional campus-based learning does not. In the course of developing your central, argumentative point, you’ll come to recognize its larger context; in this example, you may claim that online learning can serve to better integrate higher education with the rest of society, as online learners bring their educational and career experiences together.

To outline this example:

Basic Thesis/1st Story : Online learning is becoming more prevalent and takes many different forms. ( has a topic and angle, and is supportable, but the angle is broad. The angle would be more interesting if it offered an argument about an issue related to online learning.)
Strong Thesis/2nd Story : Strong thesis: While most observers see it as a transformation of higher education, online learning is better thought of an extension of higher education in that it reaches learners who aren’t disposed to participate in traditional campus-based education.( has a topic and angle, angle is arguable, supportable, and well-specified )
Stronger Thesis/3rd Story : Online learning appears to be a promising way to better integrate higher education with other institutions in society, as online learners integrate their educational experiences with the other realms of their life, promoting the freer flow of ideas between the academy and the rest of society. ( has a topic and angle, angle is arguable, supportable, and well-specified, angle contains implications that set the argument within a broader context )

Here’s one more example:

Basic Thesis/1st Story : Scientists disagree about the likely impact in the U.S. of the light brown apple moth (LBAM) , an agricultural pest native to Australia. ( has a topic and an angle, and the angle is supportable, but the angle is broad. The angle would be more interesting if it offered an argument about an issue related to the light brown apple moth.)
Strong Thesis/2nd Story : Research findings to date suggest that the decision to spray pheromones over the skies of several southern Californian counties to combat the light brown apple moth was poorly thought out. ( has a topic and angle, angle is arguable, supportable, and well-specified )
Stronger Thesis/3rd Story : Together, the scientific ambiguities and the controversial response strengthen the claim that industrial-style approaches to pest management are inherently unsustainable. ( has a topic and angle, angle is arguable, supportable, and well-specified, angle contains implications that set the argument within a broader context )

A thesis statement that stops at the first story isn’t usually considered a thesis. A two-story thesis is usually considered competent, though some two-story theses are more intriguing and ambitious than others. A thoughtfully crafted and well informed three-story thesis, which sets the angle in a broader context, puts the author on a smooth path toward an interesting and insightful essay. As a beginning writer, know that you need to “build” at least two stories into your thesis; the third is something to attempt and strive for.

Here’s more information on how to write a strong thesis sentence, offering your specific assertion that is feasible to support, and setting that assertion within a broader context.

For more see Fabio Lopez-Lazaro “Linen.” In Encyclopedia of World Trade from Ancient Times to the Present . Armonk: M.E. Sharpe, 2005. ↵
Oliver Wendell Holmes Sr., The Poet at the Breakfast Table (New York: Houghton & Mifflin, 1892) ↵
The metaphor is extraordinarily useful even though the passage is annoying. Beyond the sexist language of the time, it displays condescension toward “fact-collectors” which reflects a general modernist tendency to elevate the abstract and denigrate the concrete. In reality, data-collection is a creative and demanding craft, arguably more important than theorizing. ↵
Characteristics of a Strong Thesis. Revision and adaptation of the page The Three-Story Thesis at https://courses.lumenlearning.com/wm-englishcomposition1/chapter/text-the-three-story-thesis/, which is a revision and adaptation of the page The three-story thesis: from the ground up at http://textbooks.opensuny.org/writing-in-college-from-competence-to-excellence/. Authored by : Susan Oaks. Provided by : Empire State College. Project : College Writing. License : CC BY-NC-SA: Attribution-NonCommercial-ShareAlike
The Three-Story Thesis. Provided by : Lumen Learning. Located at : https://courses.lumenlearning.com/wm-englishcomposition1/chapter/text-the-three-story-thesis/ . Project : English Composition I. License : CC BY-NC-SA: Attribution-NonCommercial-ShareAlike
The three-story thesis: from the ground up. Authored by : Amy Guptill. Provided by : The College at Brockport, SUNY. Located at : http://textbooks.opensuny.org/writing-in-college-from-competence-to-excellence/ . Project : Writing in College: From Competence to Excellence. License : CC BY-SA: Attribution-ShareAlike
image of pagoda's three stories. Authored by : Takashi Hososhima. Provided by : Pixabay. Located at : https://flic.kr/p/gGhtya . License : CC0: No Rights Reserved
video How to Write a Strong Thesis Statement. Provided by : Scribbr. Located at : https://www.youtube.com/watch?v=DFp1uGTXo4Q&t=62s . License : Other . License Terms : YouTube video
image of a strong woman climbing a wall. Authored by : Jason Goh. Provided by : Pixabay. Located at : https://pixabay.com/photos/climbing-rope-rappelling-wall-rock-756669/ . License : CC0: No Rights Reserved
image of a man lifting a barbell with weights. Authored by : Frederick Ochari. Provided by : Pixabay. Located at : https://pixabay.com/photos/workout-gym-fitness-exercise-5350078/ . License : CC0: No Rights Reserved

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Thesis Characteristics

Whenever you are writing to explain something to your reader or to persuade your reader to agree with your opinion, there should be one complete sentence that expresses the main idea of your paper. That sentence is often called the thesis, or thesis statement. (Some other names it goes by are "the main idea" and "the controlling idea.") Based on everything you've read, and thought, and brainstormed, the thesis is not just your topic, but what you're saying about your topic. Another way to look at it is, once you've come up with the central question, or organizing question, of your essay, the thesis is an answer to that question. Remember, though, while you are still writing your paper, to consider what you have to be a "working thesis," one that may still be "adjusted." As you continue to write, read, and think about your topic, see if your working thesis still represents your opinion.

Handy reminders about the thesis (on this page):

Where to put it
Put it as a statement
Don't go overboard
Focus further
Choose the right shape

Where to Put the Thesis

The thesis usually comes within the introductory paragraph, which prepares the reader to listen to your ideas, and before the body of the paper, which develops the thesis with reasons, explanations, and evidence or examples. In fact, if you examine a well-written thesis, you will find hidden in it the questions your reader will expect you to answer in the body. For example, if your thesis is "Cannibalism, if practiced tastefully, can be acceptable in extreme circumstances," the body of your essay will develop this idea by explaining HOW it can be practiced tastefully, WHY it would be acceptable, and WHAT you would consider extreme circumstances.

Put the Thesis as a Statement

Make sure your thesis is in the form of a statement, not a question. "Can we save the Amazon rain forest?" is an ear-catching question that might be useful in the introduction, but it doesn't express an opinion or perspective as the following statements do:

"We can save the Amazon rain forest by limiting tourist presence, boycotting goods made by companies that deplete the forest's resources, and generally educating people about the need to preserve the rain forest in order to preserve the earth's ecological systems."
"We cannot save the Amazon rain forest since the companies that deplete its resources in their manufacturing are so widely-spread throughout the world, so politically powerful in their respective countries, and so wealthy that they are able to fight the opposition fully."

Don't go Overboard!

Make sure your thesis expresses your true opinion and not an exaggerated version of it. Don't say "Computers are wonderful" or "Computers are terrible" if what you really believe is "Computers do more good than harm" or "Computers do more harm than good." Why commit yourself to an extreme opinion that you don't really believe in, and then look like you're contradicting yourself later on?

Focus Further

Make sure your thesis covers exactly the topic you want to talk about, no more and no less. "Drugs should not be legalized" is too large a thesis if all you want to talk about is marijuana. "Boxing should be outlawed" is too small a thesis if you also want to discuss wrestling and football. Bite off as much as you can chew thoroughly--then chew it!

Choose the Right Shape

Shape your thesis to fit the question you wish to answer. A thesis can come in many forms, including the following:

Simply stating an opinion: "Langston Hughes was a master stylist."
Indicating categories or reasons: "Langston Hughes was a master stylist because of his vivid imagery, surprising metaphors, and effective alliteration."
Showing two aspects of a topic and emphasizing one (in this sample, the 2nd topic in the sentence is emphasized): "While Langston Hughes was a master stylist, as a critic he had several blind spots."

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Features of a successful thesis.

This handout is available for download in DOCX format and PDF format .

A thesis must consist of a claim. Questions are not claims; nor are simple descriptions. A thesis is not a topic or theme, either. It is a contention —something to be argued.
A thesis should not be obviously true or false. If a claim is obviously true, there is no need to argue for it; and if is it obviously false, there is no reason to argue for it, either. Rather, the claim should be plausible, but in need of argument and evidence to establish its veracity.
A thesis should not be overly abstract or general. It must be specific enough to be arguable, that is, specific enough to support with the evidence available to you.
A thesis should be original. It should not merely recapitulate another writer’s argument. However, this does not mean that a thesis cannot be based on or influenced by the arguments of other writers.
There must be evidence available to support the claim made in the thesis.
The claim must be of an appropriate scope such that it can be adequately argued within the length of the paper.
A thesis should be clear. Remove as much ambiguity as possible from your thesis statement, and define any technical or ambiguous terms (e.g., “Durkheim-Boas tradition,” “reductionism”) that appear in your thesis or essay.
A thesis should be concise. Generally, a thesis will be contained within a single sentence, although sometimes more complex theses are developed over two or three sentences.
A thesis should be obvious to your reader. Often, a thesis statement begins with a phrase like “I will argue…,” “In this essay I will contend…,” etc. Theses are often stated in the first paragraph or in introductory paragraphs.

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How to Write a Three Point Thesis Statement

What Is a Thesis Statement?

How to develop three points for a thesis statement, what are characteristics of a strong thesis statement.

Some aspects of writing are more challenging than others. Most high school and college students tasked with writing a thesis statement understand that it generally falls into the more challenging camp. Whether you are a skilled writer who approaches writing assignments with enthusiasm or a struggling writer who dreads them, knowing how to craft a quality thesis statement is the key to writing an effective essay or research paper.

A thesis statement is the core of an essay. It is usually one sentence, which is often placed at the end of the introduction, and lets the reader know what the essay will be about. A proper thesis will present your argument in an intriguing and confident manner.

If done properly, your thesis statement should read much like an outline in sentence form. To do this, it might preview multiple aspects of the argument that will be in your body paragraphs. Essays that are missing a thesis statement or have one that is inadequate will be harder for the writer to write and more challenging for the reader to follow and understand.

A standard thesis statement has three main components: a narrowly defined topic, a claim and reasons that support the claim. If you want a strong thesis statement, you need to make sure that all three of these points are included in it.

First, identify your topic and narrow it down as much as possible. Clothing, for example, is too broad of a topic for a thesis statement. You could narrow it down to uniforms, but that is still too vague to truly know what type of uniforms the essay will explore. School uniforms is an example of a narrowly defined topic for a thesis statement.

Next, make a specific claim about the topic. Your claim is basically an assertion or opinion about the topic, but it needs to be debatable rather than obvious and socially relevant rather than personal. I like school uniforms because they make me feel proud of my school, for example, is not debatable and is only relevant to you. School uniforms should be required is a better claim because it is debatable and socially relevant.

Finally, include reasons that will support the claim you made, which are basically the “because” part of your thesis statement. Most essays require at least three reasons to properly support a claim. The reasons should be specifically mentioned without going into further detail at the moment. The details and examples belong in your body paragraphs, not your thesis statement.

To figure out which reasons to include, identify the three main points you would like to make about your claim. These three main points essentially outline how the rest of your essay will be organized. The first reason will be the sole focus of your first body paragraph where you will use evidence and examples to support that reason. The second reason will be the sole focus of your second body paragraph, and the third reason will be the focus of your third body paragraph.

So, an example three-point thesis statement (if you were making an argument about school uniforms) would be: School uniforms should be required because they make school safer, promote school spirit and save parents money.

A strong thesis statement is one that includes all three essential components of a narrowly defined topic, debatable and socially relevant claim and reasons to support the claim. To develop a strong thesis statement, consider what you want your readers to know and why it is important.

“Zoos are bad” is an example of an incomplete and inadequate thesis statement because the claim is not very debatable and does not include any supporting reasons. It is not developed and presents no arguments.

A stronger thesis statement would be more like: “Zoos should be banned because they are unethical, they change natural animal behavior, and they pose unnecessary risks to the animals in their care.” This thesis statement includes all of the necessary components and tells the reader exactly what points will be explored and supported in the essay.

How to Write an Introduction to a Reflective Essay

How to Write an Essay on Transportation Problems

A Good Thesis Topic

How to write a rebuttal speech.

Informative Writing Techniques

The Parts of an Argument

How to Set Up a Rhetorical Analysis

How to Write a Controlling Idea Essay

Kristina Barroso earned a B.A. in Psychology from Florida International University and works full-time as a classroom teacher in a public school. She teaches middle school English to a wide range of students from struggling readers to advanced and gifted populations. In her spare time, she loves writing articles about education for TheClassroom.com, WorkingMother and other education sites.

Types Of Thesis Statements

Different Types of Thesis Statements Explained with Examples

Published on: Sep 3, 2024

Last updated on: Sep 3, 2024

The 3 Major Types of Thesis Statements

A thesis statement is a single sentence that tells the main idea or point of your essay. A good thesis statement clearly explains what your essay is about and what you’re trying to show or argue.

Depending on the nature and the type of paper you’re writing, thesis statements can be divided into three primary types.

Expository/Explanatory Thesis Statement

An explanatory or expository thesis statement is all about giving information and explaining something. When you use this type, you’re setting up your essay to provide details, describe a process, or clarify a concept. Your goal is to inform the reader rather than to argue or analyze.

Example: “The process of photosynthesis involves the conversion of sunlight into energy, which plants use to grow and produce oxygen.”

In this example, the thesis statement clearly indicates that the essay will explain how photosynthesis works. It doesn’t try to persuade the reader or analyze different aspects; it simply provides information on a topic.

Argumentative Thesis Statement

In this example, the thesis statement clearly indicates that the argumentative essay will explain how photosynthesis works. It doesn’t try to persuade the reader or analyze different aspects; it simply provides information on a topic.

Example: “Implementing a four-day workweek would increase productivity and improve employee well-being, making it a beneficial change for modern businesses.”

Here, the thesis statement makes a clear argument that the four-day workweek is a positive change. The essay will then focus on providing evidence and reasons to support this point of view, as well as addressing any opposing views.

Analytical Thesis Statement

An analytical thesis statement breaks down a topic into its components and examines them. It’s used when you want to analyze how something works or evaluate different parts of a subject. This type of thesis statement is great for essays that involve analyzing literature, processes, or events.

Example: “In Shakespeare’s Hamlet , the use of soliloquies reveals the internal conflicts of the characters, illustrating their struggles with morality and action.”

This thesis statement sets up an essay that will analyze how soliloquies in Hamlet reflect the characters’ inner conflicts. It shows that the essay will dissect the use of these soliloquies and explain their significance.

Other Commonly Used Types

Besides the major types of thesis statements, there are several others that you might come across. Each type serves a different purpose and helps shape your essay in specific ways. Here’s a quick look at some commonly used kinds of thesis statements:

Persuasive Thesis Statement

When your goal is to convince your reader of your viewpoint, a persuasive thesis statement comes into play. This type clearly presents the argument you'll support with evidence throughout your essay.

Narrative Thesis Statement

A narrative thesis statement introduces the story or personal experience you'll describe in your essay. It sets the stage for the main event or plot of your narrative.

Descriptive Thesis Statement

If your essay focuses on painting a vivid picture of a person, place, object, or event, you’ll use a descriptive thesis statement. This type emphasizes detailed and sensory-rich descriptions to help readers visualize the subject.

Comparative Thesis Statement

To analyze and contrast different subjects, a comparative thesis statement is what you need. It compares two or more things, highlighting their similarities and differences.

Cause and Effect Thesis Statement

Exploring how one event leads to another calls for a cause and effect thesis statement. This type examines the relationship between causes and their outcomes.

Evaluative Thesis Statement

When making a judgment about the value or significance of something, an evaluative thesis statement is used. It involves assessing and critiquing the subject based on specific criteria.

Open Thesis Statement:

An open thesis statement is broad and allows for exploring various aspects of a topic. It’s flexible and doesn’t limit the scope of the essay too much.

Closed Thesis Statement:

A closed thesis statement is more specific and outlines the exact points or arguments that will be addressed in the essay. It gives a clear direction and indicates the structure of the argument or analysis.

How to Choose the Right Type of Thesis Statement

Choosing the right thesis statement is essential for guiding your essay in the right direction. To find the best fit, consider the following steps:

Know Your Goal: Decide if you’re trying to inform, argue, analyze, or compare.
Match the Format: Choose a thesis that fits the style of your essay, like narrative, descriptive, or cause and effect.
Align with Your Points: Make sure your thesis reflects what you’ll be discussing or comparing.
Be Clear: Your thesis should clearly show the direction of your essay.
Be Flexible: Adjust your thesis if your focus changes during writing.

In Summary,

So, what’s the takeaway from all these different types of thesis statements? Understanding and choosing the right one can make a huge difference in how you communicate your ideas. Each type has its own role in shaping your essay.

If you need a helping hand with writing thesis statements, don’t worry—there’s help available. Try using the thesis statement generator from MyEssayWriter.ai . It’s a powerful tool that can guide you in creating a strong, clear thesis statement tailored to your essay’s needs.

Give our essay writer a try and take the guesswork out of your writing process!

Commonly Asked Questions

What is the 3 parts of a thesis statement.

Topic: This tells the reader what the essay is about. It’s the subject you’ll be discussing.
Claim: This is your main point or argument about the topic. It’s what you want to prove or explain.
Reasons: These are the main reasons or points that support your claim. They outline how you’ll back up your argument in the essay.

What are the different types of thesis claims?

Fact Claim: Asserts that something is true or false. It’s based on verifiable evidence.
Value Claim: Argues whether something is good or bad, right or wrong. It’s based on personal or cultural values.
Policy Claim: Suggests a course of action or change. It proposes what should be done or how things should be done differently.
Definition Claim: Defines a term or concept in a specific way. It clarifies what something means or how it should be understood.

What is a theme statement and what are its types?

A theme statement is a sentence that shows the main message or big idea of a story. Instead of just summarizing what happens, it explains what the author wants to say about life, society, or people through the story.

Its types are:

Universal theme statement
Specific theme statement
Complex theme statement
Implicit theme statement
Explicit theme statement

Caleb S. (Mass Literature and Linguistics, Masters)

Caleb S. is an accomplished author with over five years of experience and a Master's degree from Oxford University. He excels in various writing forms, including articles, press releases, blog posts, and whitepapers. As a valued author at MyEssayWriter.ai, Caleb assists students and professionals by providing practical tips on research, citation, sentence structure, and style enhancement.

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Hogar > Blog > Ejemplos de ensayos de enunciados de tesis

Ejemplos de ensayos de enunciados de tesis

Equipo editorial de Smodin
Actualizado: 30 de agosto de 2024
Guía general sobre contenido y redacción
Instrucciones paso a paso para escribir

Escribir un ensayo puede parecer un desafío, pero una declaración de tesis sólida puede facilitarlo. Una declaración de tesis es una parte crucial de cualquier ensayo. Le da al lector una comprensión clara de su idea principal. El objetivo debe ser entregar una declaración sólida, concisa y convincente que sumerja al lector en su escritura. Una declaración de tesis sólida significa una Buen comienzo para tu ensayo !

Hemos desarrollado esta guía completa para explorar qué hace que una declaración de tesis sea buena. Analizaremos diferentes ejemplos de declaraciones de tesis y le mostraremos los pasos para escribir una declaración sólida. Ya sea que esté escribiendo un artículo de investigación, un ensayo argumentativo o una propuesta de política, una declaración de tesis sólida es clave.

Un estudiante escribe en un escritorio frente a una computadora portátil.

¿Qué es una declaración de tesis?

En pocas palabras, una declaración de tesis resume todo el trabajo. Suele aparecer al final del primer párrafo, conocido como introducción del ensayo. La tesis debe ser específica, concisa y clara.

Debe expresar una idea principal y guiar su redacción. Por ejemplo, si su artículo explica el cambio climático, su tesis podría afirmar que “el cambio climático plantea una amenaza significativa para los ecosistemas globales”.

Cómo redactar una declaración de tesis: ejemplo y qué incluir

En esta sección, incluimos cómo escribir una declaración de tesis con un ejemplo para ayudarte en el proceso. A continuación, enumeramos algunos de los pasos necesarios para redactar una declaración de tesis.

Empecemos con una pregunta

Toda buena tesis comienza con una pregunta. Piensa en lo que quieres explorar o decidir sobre tu tema. Por ejemplo, “¿Internet ha tenido un impacto positivo o negativo en la educación?”

Escribe tu respuesta inicial

Después de investigar un poco, escribe una respuesta sencilla y tentativa a tu pregunta. Esto guiará tu proceso de investigación y redacción. Por ejemplo, “Internet ha tenido un impacto positivo en la educación”.

Perfeccione su declaración de tesis

Tu tesis final debería explicarle al lector por qué mantienes esa postura. Puedes explicar con más detalle qué aprenderán de tu ensayo y los puntos clave de tu argumento.

Por ejemplo, “el impacto positivo de Internet en la educación supera sus efectos negativos al facilitar el acceso a la información. La exposición a diferentes perspectivas y un entorno de aprendizaje flexible para estudiantes y profesores contribuyen a ello”.

Dos estudiantes sonriendo mientras trabajan en un proyecto al aire libre.

Un buen ejemplo de enunciado de tesis

Una buena declaración de tesis es concisa, coherente y contenciosa. Debe expresar claramente la idea principal y estar respaldada por evidencia específica. Observa el siguiente ejemplo de una buena declaración de tesis:

“Si bien muchas personas creen que el cambio climático es un fenómeno natural, la evidencia muestra que las actividades humanas contribuyen significativamente a su aceleración”.

Esta afirmación es clara, concisa y debatible. Presenta una postura firme que puede respaldarse con pruebas.

Tipos de declaraciones de tesis

Tu tesis debe coincidir con el tipo de ensayo que estás escribiendo. A continuación, se muestran algunos ejemplos de diferentes tipos de declaraciones de tesis.

Declaración de tesis argumentativa

En una ensayo argumentativo , tu tesis debe tomar una posición fuerte.

Por ejemplo, mediante los siguientes elementos:

“El gobierno debería implementar regulaciones más estrictas sobre las emisiones de carbono para combatir el cambio climático”.

Un ensayo argumentativo presenta una afirmación clara y debatible que requiere evidencia y razonamiento. Esta tesis presenta un argumento claro que se sustentará con evidencia a lo largo del ensayo.

Declaración de tesis expositiva

En una ensayo expositivo , su tesis debe explicar los hechos de un tema o proceso.

“La invención del braille mejoró la vida de las personas ciegas al permitirles leer y escribir de forma independiente”.

Esta declaración explica el impacto del braille sin tomar posición.

Una chica con una camiseta amarilla trabajando en un escritorio frente a una computadora portátil y sonriendo.

Ejemplos de enunciados de tesis para distintos tipos de trabajos

Veamos algunos ejemplos de ensayos de enunciados de tesis para comprender cómo elaborar uno de manera efectiva.

Ejemplo 1: Documento argumentativo

Tema: El impacto de la vigilancia en la sociedad

Declaración de tesis: “Aunque la vigilancia a menudo se considera negativamente, sus efectos positivos sobre la seguridad pública superan sus desventajas”.

Esta tesis presenta un argumento claro que será respaldado con evidencia a lo largo del ensayo.

Ejemplo 2: Documento expositivo

Tema: La historia de Internet

Declaración de tesis: “Internet revolucionó la comunicación al permitir el acceso instantáneo a la información y conectar a personas a nivel mundial”.

Esta afirmación explica cómo Internet ha cambiado la comunicación sin presentar ningún argumento.

En ambos ejemplos, las declaraciones de tesis son claras y concisas y proporcionan una hoja de ruta para el ensayo.

Ejemplo 3: Documento analítico

Tema: El impacto de las redes sociales en la salud mental

Declaración de tesis: “Las redes sociales influyen en la salud mental al aumentar la ansiedad, promover imágenes corporales poco realistas y mejorar las conexiones sociales”.

Una declaración de tesis analítica divide una idea en partes para examinarla e interpretarla. Este ejemplo muestra el impacto de las redes sociales en componentes específicos para un análisis detallado. Un artículo analítico divide temas complejos en componentes para examinarlos y analizarlos en detalle.

Características de una buena declaración de tesis

Una declaración de tesis eficaz es la columna vertebral de un ensayo bien estructurado. Los ejemplos de declaraciones de tesis ayudan a ilustrar las diferencias entre declaraciones de tesis sólidas y débiles. A continuación, se presentan las características esenciales de una buena declaración de tesis.

Resumen conciso

Las mejores declaraciones de tesis deben ser breves y concisas. Evite las palabras innecesarias. Por ejemplo, en lugar de decir: “En este ensayo, analizaré las razones por las que el cambio climático es un problema crítico que requiere atención urgente”, puede decir: “El cambio climático exige atención urgente debido a su grave impacto en los ecosistemas globales”. Esto mantiene su tesis clara y centrada.

El objetivo es llevar la declaración a la Punto final tan efectivamente como sea posible.

Evidencia específica

En la redacción académica, la tesis debe estar respaldada por evidencia específica. No debe limitarse a hacer una afirmación, sino también proporcionar una pista de la evidencia que la respalda. Por ejemplo, “Las actividades humanas, como la deforestación y el consumo de combustibles fósiles, contribuyen significativamente al cambio climático”, indica que el ensayo analizará estas actividades específicas.

Idea principal

Una declaración de tesis sólida enuncia claramente la idea principal. Debe transmitir el punto central del ensayo de una manera que sea fácil de entender. Por ejemplo, “Las fuentes de energía renovables son esenciales para reducir las emisiones de carbono y combatir el cambio climático” enuncia claramente la idea principal del ensayo.

Una mujer joven sentada en el suelo de su sala de estar, usando una computadora portátil mientras toma notas.

3 Errores comunes a evitar

Segun el guardián Los profesores observan que los estudiantes tienen continuamente problemas para escribir ensayos. Esto puede deberse a varias razones, como la falta de habilidades básicas para escribir o la probabilidad de que cometan errores específicos al redactar sus ensayos y declaraciones de tesis.

A continuación, enumeramos algunos de los errores comunes que los estudiantes pueden cometer al escribir una declaración de tesis para su trabajo.

1. Ser demasiado amplio

Una tesis demasiado amplia carece de enfoque y no ofrece un argumento claro. Por ejemplo: “El cambio climático es malo” es demasiado amplio. En cambio, limite su enfoque a algo más específico, como “El cambio climático afecta significativamente a las ciudades costeras al aumentar la frecuencia de las inundaciones”.

2. No entrar en detalles

Una tesis vaga no brinda detalles específicos, lo que dificulta que el lector comprenda su argumento. Por ejemplo, “El cambio climático afecta el medio ambiente” es demasiado vago. Una tesis más precisa sería: “El cambio climático acelera el derretimiento de los casquetes polares, lo que provoca el aumento del nivel del mar”.

3. Simplemente afirmando un hecho

En un buen trabajo de investigación, una tesis que exponga un hecho en lugar de un argumento no es debatible. Por ejemplo, “El cambio climático existe” es una declaración de hecho y no es discutible. Una tesis más debatible sería: “Se requieren acciones inmediatas para mitigar los impactos del cambio climático en las generaciones futuras”.

Cómo fortalecer una tesis débil

Si su declaración de tesis es débil, aquí le mostramos cómo puede fortalecerla:

Contextualice su tema: comprenda el contexto más amplio de su tema. Esto ayuda a delimitar el tema y hacerlo más específico.
Haz que sea debatible: asegúrate de que tu tesis sea algo que pueda debatirse. Una tesis sólida suele adoptar una postura clara sobre un tema.
Respalde su tesis con evidencia: prepárese para respaldarla con evidencia específica. Esto le suma credibilidad y solidez a su afirmación.

Ejemplo de una tesis débil

Una declaración de tesis débil, como “Internet es útil”, es demasiado general y carece de especificidad. No proporciona ninguna dirección para el ensayo, lo que hace que los lectores no tengan claro qué abordará el ensayo. Una declaración de tesis débil:

Falta de enfoque: la afirmación “Internet es útil” no especifica cómo ni por qué es útil. Esta falta de enfoque puede confundir a los lectores y dificultar el desarrollo de argumentos de apoyo.
No se centra en un tema específico: esta tesis es demasiado amplia y abarca demasiados temas potenciales sin centrarse en un aspecto específico.
No deja lugar al debate: no presenta una afirmación debatible. Una tesis sólida debe plantear una afirmación que otros puedan rebatir, proporcionando una base para la argumentación y el debate.

Por ejemplo, un ensayo basado en la tesis débil “Internet es útil” podría desviarse por diversos temas, como compras en línea, redes sociales e investigación, sin una estructura o argumento claros. Esto dificulta que los lectores comprendan el punto principal o el propósito del ensayo.

Ejemplo de una tesis sólida

Una declaración de tesis sólida, como “Internet es útil para la educación porque brinda acceso a una gran cantidad de información y recursos”, es específica y brinda un argumento claro respaldado por evidencia. También indica lo que se tratará en el ensayo, lo que ayuda a orientar al lector.

Por lo tanto, una declaración de tesis sólida debe:

Tener un enfoque claro: esta tesis especifica que el ensayo se centrará en los beneficios educativos de Internet. Esta claridad ayuda a los lectores a comprender el propósito del ensayo desde el principio.
Vaya al grano: la tesis menciona “el acceso a una gran cantidad de información y recursos”, por lo que ofrece un ángulo específico sobre la utilidad de Internet, lo que ayuda a delimitar el alcance del ensayo.
Incluir una afirmación debatible: la afirmación plantea una afirmación que podría discutirse. Postula que Internet es beneficioso para la educación, pero también implica que existen formas específicas en las que esto es cierto. Por lo tanto, la afirmación abre la puerta al debate y al análisis.
Guía del ensayo: Esta tesis sólida proporciona una hoja de ruta para el ensayo. Sugiere que los párrafos siguientes explorarán cómo Internet facilita la educación a través del acceso a la información y la disponibilidad de recursos.

Una mujer joven escribe en un bloc de notas mientras está sentada en una roca en la orilla de un río.

Preguntas Frecuentes

¿qué incluye una declaración de tesis.

Una declaración de tesis es una oración que resume el punto principal de tu ensayo. Suele aparecer al final del primer párrafo.

¿Puede una declaración de tesis tener más de una oración?

Lo ideal es que una declaración de tesis tenga una o dos oraciones.

¿Dónde debo colocar mi declaración de tesis?

La declaración de tesis debe estar al final del primer párrafo, conocido como introducción del ensayo.

Mejora tus declaraciones de tesis con Smodin.io

Una buena declaración de tesis es la columna vertebral de tu ensayo. Guía tu redacción y le dice al lector qué esperar. Si sigues los pasos que hemos descrito en estos ejemplos, podrás escribir una declaración de tesis sólida.

¿Estás listo para mejorar tus habilidades de escritura y crear ensayos atractivos? Mejora tu escritura con la herramienta de escritura con inteligencia artificial de Smodin. Ya sea que estés escribiendo un trabajo de investigación o un ensayo argumentativo, Smodin puede ayudarte a elaborar una declaración de tesis sólida. Únase a nosotros ahora en Smodin.io y lleva tu escritura al siguiente nivel.

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Pollution characteristics, toxicological properties, and health risk assessment of phthalic acid esters in water, soil, and atmosphere.

1. Introduction

2. sources and pollution status.

Click here to enlarge figure

3. Determination Techniques and Strategies

Detection Settings	Pre-Treatment or Instrument Optimization	Detection Media	Advantage	Disadvantage	Recovery Rate (%)	Detection Limit	Quantification Limit	Linear Range	References
GC-MS	Accelerated solvent extraction and cycle extraction (two times)	Soil and atmospheric particulate matter	Fast extraction speed, small amount of organic solvent, and high automation degree	False positives, poor reproducibility, and stability are possible and costly	65.7~108	-	-	-	[ , , , , , , ]
	Ultrasonic extraction	Food contact material	-		86.0~108.0	-	-	0.02~2.0 µg·mL
	20 mL n-hexane extraction. Ultrasonic extraction was performed at 40 °C for 30 min	Express plastic bag	Simple pretreatment, good recovery rate, and precision		85.0~107.2	2.0~10.0 mg·kg	-	0.05~1.0 µg·mL
	Acetone/n-hexane (1:1) was extracted twice; extraction for 10 min	Soil/agricultural products	-		78.2	1.04~14.24 µg·L	0.24~0.45 µg·L
	N-hexane/acetone (4:1), repeated three times	Dust	-		76.0~130.0	-	10 µg·kg	-
	Determination of DOC, WEOC, and TOC in water by catalytic oxidation at high-temperature glass fiber membrane filtration	Water	-		94.0~106.0	0.006~0.01 µg·L	0.018~0.045 µg·L	-
		Sediments	-		77.0~113.0	0.003~0.008 mg·kg	0.009~0.024 µg·kg	-
UPLC-MS/MS	35 °C column temperature and methanol–water mobile phase	Edible and medicinal fungi	The method is simple to operate and has high accuracy	-	79.4~104.3	-	0.2~8.0 µg·kg	0.2~500 µg·mL	[ ]
Liquid chromatography	226 nm test wavelength, 325 nm reference wave, and methanol–water mobile phase	Shoes	Short analysis time and good repeatability	Susceptible to interference from other chromatographic peaks	90.5~97.7	1.9~8.9 mg·kg	-	10~100 µg·mL	[ , ]
HPLC	Ultrasonic extraction has a maximum UV absorption wavelength of 205 nm	Soil	A wide linear range	-	72.59~91.89	0.005~0.03 mg·kg	-	0.1~100 µg·mL	[ ]

4. Toxicity and Potential Hazards

4.1. non-reproductive toxicity, 4.2. reproductive toxicity, 5. exposure levels and health risk assessment.

Evaluation Media	Pollutant	Evaluation Object	Risk	References
Drinking water	DEHP	Adults, children	Health risks	[ ]
Surface water	ΣPAEs	Adults, children	Non-carcinogenic risks are negligible	[ ]
Surface water	ΣPAEs	Adults, children	Potential carcinogenic risk	[ ]
Domestic tap water	DEP, DBP	Adults, children	Non-carcinogenic risks are negligible	[ ]
Domestic tap water	DEHP	Adults, children	Potential carcinogenic risk	[ ]
Urban soil	ΣPAEs	Adults, children	Carcinogenic/non-carcinogenic risks are negligible	[ ]
Drinking water	ΣPAEs	Adult male	health risks	[ ]
Petrochemical atmosphere	ΣPAEs	Adults, children	Low health risks	[ ]
University dormitory dust	ΣPAEs	Adults	Low non-carcinogenic risk	[ ]
University dormitory dust	DEHP, BBP	Adults	Low carcinogenic risk	[ ]
Industrial area atmosphere	ΣPAEs	Adults, children	Carcinogenic/non-carcinogenic risks are negligible	[ ]
Industrial area atmosphere	ΣPAEs	Adults, children	Carcinogenic/non-carcinogenic risks are negligible	[ ]
Plastic lunch box	ΣPAEs	Adults, children	Carcinogenic/non-carcinogenic risks are negligible	[ ]
Surface water	DEHP	Adults, children	Low health risks	[ ]
Menstrual pad	ΣPAEs	Adults, children	Non-carcinogenic risks are negligible	[ ]
Menstrual pad	DEHP	Adults, children	Potential carcinogenic risk	[ ]

6. Prevention and Control of PAE Pollution

Year	Nations/Organizations	Substance	Requirement	References
1999	EU	DiNP, DEHP DBP, DiBP DOP, BBP	Prohibited in the production of toys and childcare products for children under 3 years of age.	[ ]
2009	US. CPSIA	DEHP, DBP BBP	Permanent ban on the use, distribution, and import of these substances in children’s toys and childcare products. Restricted use: 0.1%.	[ ]
2009	US. CPSIA	DiNP, DiDP DnOP	Can be used in children’s oral products and care products. Restricted use: 0.1%.	[ ]
2009	CHINA	DEHP, DBP BBP	DEHP, DBP, and BBP sum less than or equal to 0.1%.	[ ]
2009	CHINA	DiNP, DiDP DnOP	DiNP, DiDP, and DnOP sum less than or equal to 0.1%.	[ ]
2011	EU	BBP	Quantity contained less than 0.1%. Migration less than 0.3 mg·kg .	[ ]
2011	EU	DEHP	Quantity contained less than 0.1%. Migration less than 30 mg/kg.	[ ]
2011	EU	DiDP	Quantity contained less than 0.1%. The sum of DiDP and DiNP is less than 9 mg·kg .	[ ]
2011	EU	DiNP	Quantity contained less than 0.1%. The sum of DiNP and DiNP is less than	[ ]
2012	US. EPA	DEHP	C ≤ 6 µg·L	[ ]
2018	EU. REACH	DEHP, DBP BBP, DiBP	1. Substances or mixtures that may not be used as toys or childcare products. 2. Individual or combined concentration of four PAEs less than or equal to 0.1%.	[ ]
2018	EU. REACH	DEHP DBP BBP	1. Substances or mixtures that may not be used as toys or childcare products. 2. Individual or combined concentration of three PAEs less than or equal to 0.1%.	[ ]
2022	WHO	DEHP	C ≤ 8	[ ]

7. Conclusions

Supplementary materials, author contributions, institutional review board statement, informed consent statement, data availability statement, acknowledgments, conflicts of interest.

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Long, F.; Ren, Y.; Ji, Y.; Li, J.; Zhang, H.; Wu, Z.; Gao, R.; Bi, F.; Liu, Z.; Li, H. Pollution Characteristics, Toxicological Properties, and Health Risk Assessment of Phthalic Acid Esters in Water, Soil, and Atmosphere. Atmosphere 2024 , 15 , 1071. https://doi.org/10.3390/atmos15091071

Long F, Ren Y, Ji Y, Li J, Zhang H, Wu Z, Gao R, Bi F, Liu Z, Li H. Pollution Characteristics, Toxicological Properties, and Health Risk Assessment of Phthalic Acid Esters in Water, Soil, and Atmosphere. Atmosphere . 2024; 15(9):1071. https://doi.org/10.3390/atmos15091071

Long, Fangyun, Yanqin Ren, Yuanyuan Ji, Junling Li, Haijie Zhang, Zhenhai Wu, Rui Gao, Fang Bi, Zhengyang Liu, and Hong Li. 2024. "Pollution Characteristics, Toxicological Properties, and Health Risk Assessment of Phthalic Acid Esters in Water, Soil, and Atmosphere" Atmosphere 15, no. 9: 1071. https://doi.org/10.3390/atmos15091071

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How to Write a Thesis Statement
Step 2: Write your initial answer. After some initial research, you can formulate a tentative answer to this question. At this stage it can be simple, and it should guide the research process and writing process. The internet has had more of a positive than a negative effect on education.
Tips and Examples for Writing Thesis Statements
2. Characteristics of a Strong Thesis Statement. To write an effective thesis statement, it should possess the following characteristics: A. Specificity: A strong thesis statement is specific rather than vague or broad. It clearly defines the scope of your paper and outlines the specific aspects you will explore.
9.1 Developing a Strong, Clear Thesis Statement
A Strong Thesis Statement. A strong thesis statement contains the following qualities. Specificity. A thesis statement must concentrate on a specific area of a general topic. As you may recall, the creation of a thesis statement begins when you choose a broad subject and then narrow down its parts until you pinpoint a specific aspect of that topic.
Thesis Statements
A thesis statement: tells the reader how you will interpret the significance of the subject matter under discussion. is a road map for the paper; in other words, it tells the reader what to expect from the rest of the paper. directly answers the question asked of you. A thesis is an interpretation of a question or subject, not the subject itself.
What is a Thesis Statement: Writing Guide with Examples
A thesis statement is a sentence in a paper or essay (in the opening paragraph) that introduces the main topic to the reader. As one of the first things your reader sees, your thesis statement is one of the most important sentences in your entire paper—but also one of the hardest to write! In this article, we explain how to write a thesis ...
How to Write a Strong Thesis Statement
Teachers will have different preferences for the precise location of the thesis, but a good rule of thumb is in the introduction paragraph, within the last two or three sentences. Strength: Finally, for a persuasive thesis to be strong, it needs to be arguable. This means that the statement is not obvious, and it is not something that everyone ...
PDF Writing a Strong Thesis Statement
• Try and avoid using a three-pronged thesis statement. Experienced, creative writers aim to make a general claim and avoid the standard "five paragraph essay." Expository (Explanatory) Thesis Statements . An expository paper explains something to the reader. An expository thesis statement details: 1. What you are going to explain 2.
Developing a Thesis Statement
A thesis statement . . . Makes an argumentative assertion about a topic; it states the conclusions that you have reached about your topic. Makes a promise to the reader about the scope, purpose, and direction of your paper. Is focused and specific enough to be "proven" within the boundaries of your paper. Is generally located near the end ...
How to Write a Strong Thesis Statement: 4 Steps + Examples
Step 4: Revise and refine your thesis statement before you start writing. Read through your thesis statement several times before you begin to compose your full essay. You need to make sure the statement is ironclad, since it is the foundation of the entire paper. Edit it or have a peer review it for you to make sure everything makes sense and ...
How to write a thesis statement + Examples
It is a brief statement of your paper's main argument. Essentially, you are stating what you will be writing about. Organize your papers in one place. Try Paperpile. No credit card needed. Get 30 days free. You can see your thesis statement as an answer to a question. While it also contains the question, it should really give an answer to the ...
5.2 Developing a Strong, Clear Thesis Statement
A Strong Thesis Statement. A strong thesis statement contains the following qualities: Specificity: A thesis statement must concentrate on a specific area of a general topic. As you may recall, the creation of a thesis statement begins when you choose a broad subject and then narrow down its parts until you pinpoint a specific aspect of that topic.
Developing Strong Thesis Statements
This thesis statement is not debatable. First, the word pollution implies that something is bad or negative in some way. Furthermore, all studies agree that pollution is a problem; they simply disagree on the impact it will have or the scope of the problem. No one could reasonably argue that pollution is unambiguously good.
Thesis Statements
A thesis statement is a sentence (sometimes more than one sentence) in the introduction that tells the reader the following information: What the topic of the paper is. How the writer intends to discuss that topic. It gives a blueprint for how the essay will be structured. How the writer intends to prove or demonstrate his or her main points.
PDF Thesis Statements
thesis statement, and it serves as a summary of the argument you'll make in the rest of your paper. What is a thesis statement? A thesis statement: tells the reader how you will interpret the significance of the subject matter under discussion. is a road map for the paper; in other words, it tells the reader what to expect from the rest of ...
How Do I Write a Thesis Statement?
Generally, a thesis statement consists of two parts: A clearly identifiable topic or subject matter. A succinct summary of what you have to say about that topic. For your reader, a thesis functions like the case a lawyer has to make to the judge and jury in a courtroom. An effective thesis statement explains to your reader the case you are ...
PDF How to Create a Strong Thesis Statement
This is a stronger thesis because it takes a stand, and because it's specific. 2. A strong thesis statement justifies discussion. Your thesis should indicate the point of the discussion. If your assignment is to write a paper on kinship systems, using your own family as an example, you might come up with either of these two thesis statements:
Tips for Writing an Effective Thesis Statement
Tips for Writing an Effective Thesis Statement. This handout is available for download in DOCX format and PDF format. Thesis statements are essentially the driving force and backbone of an academic essay. Without a thesis statement, your essay will lack a cohesive argument and will read more like a list of statistics, quotations or connecting ...
Characteristics of a Strong Thesis
A thesis statement like that has a wide-enough scope to incorporate several supporting points and concurring evidence, enabling the writer to demonstrate his or her mastery of a basic essay format. College instructors, though, fully expect you to produce something more developed. A strong thesis is arguable. In everyday life, "arguable" is ...
Thesis Characteristics
Thesis Characteristics. Whenever you are writing to explain something to your reader or to persuade your reader to agree with your opinion, there should be one complete sentence that expresses the main idea of your paper. That sentence is often called the thesis, or thesis statement. (Some other names it goes by are "the main idea" and "the ...
PDF Writing a Strong Thesis Statement
Finally, let's look at a few different types1 of thesis statements: Argumentative: It makes a case. That's the biggest difference between a thesis and a topic — a topic is something like "Slavery in Huck Finn.". That's not a case, only a general area. A thesis, on the other hand, makes a specific case, it tries to prove something.
Features of A Successful Thesis
Generally, a thesis will be contained within a single sentence, although sometimes more complex theses are developed over two or three sentences. A thesis should be obvious to your reader. Often, a thesis statement begins with a phrase like "I will argue…," "In this essay I will contend…," etc. Theses are often stated in the first ...
How to Write a Three Point Thesis Statement
Step 1. First, identify your topic and narrow it down as much as possible. Clothing, for example, is too broad of a topic for a thesis statement. You could narrow it down to uniforms, but that is still too vague to truly know what type of uniforms the essay will explore. School uniforms is an example of a narrowly defined topic for a thesis ...
The 3 Main Types and Subtypes of Thesis Statements
Open Thesis Statement: An open thesis statement is broad and allows for exploring various aspects of a topic. It's flexible and doesn't limit the scope of the essay too much. Closed Thesis Statement: A closed thesis statement is more specific and outlines the exact points or arguments that will be addressed in the essay.
How to Write a Thesis Statement in 4 Steps
How to Write a Thesis Statement in 4 Steps. If you produce a solid thesis statement to kick off an argumentative essay or piece of academic writing, you instantly frame the objective for yourself as a writer and for your audience as readers. By learning how to write a thesis statement, you will rapidly advance your pedigree as an academic ...
Thesis Statement Essays Examples
An effective thesis statement is the backbone of a well-structured essay. Thesis statement examples help illustrate the differences between strong and weak thesis statements. Here are the essential characteristics of a good thesis statement. Resumen conciso. The best thesis statements should be brief and to the point. Avoid unnecessary words.
Pollution Characteristics, Toxicological Properties, and Health Risk
Phthalic acid esters (PAEs) are a class of common environmental endocrine disruptors (EEDs), capable of causing considerable pollution to water, soil, and air and producing a range of adverse health impacts in humans. Although various studies have investigated the pollution characteristics and health hazards of PAEs in different media, a systematic review of PAEs in the broader environmental ...

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Tips and Examples for Writing Thesis Statements

B. Arguability:

Tips for Writing a Strong Thesis Statement

9.1 Developing a Strong, Clear Thesis Statement

Elements of a Thesis Statement

A Strong Thesis Statement

Examples of Appropriate Thesis Statements

Writing at Work

Thesis Statement Revision

Ways to Revise Your Thesis

Key Takeaways

How to Write a Strong Thesis Statement

Guide Overview

2 Categories of Thesis Statements: Informative and Persuasive

2 Styles of Thesis Statements

Formula for a Strong Argumentative Thesis

___________ is true because of ___________, ___________, and ___________.

___________________ is true because of _____________________.

The Qualities of a Solid Thesis Statement

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What is a thesis statement?

Identify a topic

Consider what your assignment asks you to do

Sample assignment 1

Sample assignment 2

Developing a Thesis Statement–Additional information

Derive a main point from topic

Look for patterns in your evidence

Purpose statement

Derive purpose statement from topic

Compose a draft thesis statement

Question-to-Assertion

What to keep in mind as you draft an initial thesis statement

Refine and polish the thesis statement

Sample Assignment

Complete the final thesis statement

Writing Process and Structure

Getting Started with Your Paper

Creating an Argument

Working with Sources

Drafting Your Paper

Revising Your Paper

Finishing Your Paper

Writing Collaboratively

What are your chances of acceptance?

Your chancing factors

How to Write a Strong Thesis Statement: 4 Steps + Examples

What’s Covered:

Step 1: Decide what kind of paper you’re writing

Step 2: Figure out what point you want to make

Step 3: Determine what information you’ll use to back up your point

Step 4: Revise and refine your thesis statement before you start writing

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How to write a thesis statement + examples

What is a thesis statement?

5.2 Developing a Strong, Clear Thesis Statement

Elements of a Thesis Statement

A Strong Thesis Statement

Examples of Appropriate Thesis Statements

Writing at Work

Writing a Thesis Statement

Revising a Thesis Statement

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Developing Strong Thesis Statements

Welcome to the Purdue OWL

The thesis statement or main claim must be debatable

The thesis needs to be narrow

Types of claims

Thesis Statements

For you as the writer, the thesis statement:

_____ is true because of _, _, and _____.

_ is true because of ___.