5.3 Thesis Statement

A thesis is simply an expression of the main idea of what you are writing about. The thesis will be determined by the kind or genre of paper you are asked to write, but even a summary assignment—a paper in which you summarize the ideas of another writer without adding your thoughts—must have a thesis. A thesis for a summary would be your expression of the main idea of the work you are summarizing. The presence of a thesis, and paragraphs to support that thesis, is what distinguishes a summary from a list.

A thesis statement is a sentence that expresses the main claim of the entire essay. This means that every paragraph, every major point, every supporting detail, and every source must somehow relate to and support the thesis.

Essentially, when readers want to know what your point is, what they want to know is your thesis. And all college writing assignments expect you to make a point of some kind or another. This means that every one of your college essays should have a thesis. Some assignments emphasize argumentation more than others, so this need for a thesis might be less obvious to you in an essay that focuses more on reporting information, but it’s still there: your audience always expects you to make a point. An essay that has a good thesis has a good chance of succeeding. An essay that has a bad thesis, no matter what other strengths it may display, has a very poor chance of succeeding.

A common thesis statement is capable of being expressed in a single sentence. Much more information will be added to it in later sentences and paragraphs as support, but the primary idea itself will be focused and decisive enough to be stated in one sentence. However, there are times when a thesis statement should be multiple sentences, nevertheless, it should always be concise and clear.

A good thesis takes the form of a declarative sentence. This means that a good thesis is never a question. A question cannot state a point directly, but a thesis is a directly stated point, which means it won’t be a question but instead a possible answer to a question.

Three Characteristics of a Good Thesis

A good thesis statement has three characteristics:

• It is specific.
  • This means that it focuses on clearly defined ideas, often narrow enough to be discussed in a single essay. Within a thesis, referring to “sports” is not specific, but referring to “combat sports during the COVID-19 pandemic” is.
• It is arguable.
  • This means that equally reasonable, intelligent, and educated readers could hold differing positions on the matter, and that the issues in the thesis can’t be answered with any kind of general certainty. “Bullying is bad” is not arguable for academic audiences, but what schools should do about bullying is. Keep in mind that arguable does not necessarily mean controversial. Academic arguments can be claims of analysis, observation, or other typically non-controversial modes. For example, a thesis claiming that “horror stories function through four primary motifs” is not controversial, but academically it is arguable. See more in the section Rhetoric and Argumentation.
• It is significant.
  • This means that it has some meaningful bearing on others and/or society. “I think Disney movies are terrible” is not significant, but exploring how “Disney movies have negatively affected the unrealistic worldview of children” is.

Common Errors: Bad Thesis Statements

It is possible for a thesis to be a single, declarative sentence yet still be bad. Often, this is because the thesis fails to display the three characteristics explained above. Here are some examples of bad thesis statements, along with brief explanations:

Example 1 is bad because it is not specific. It does not indicate what drugs, specific effects, communities, or any other useful information.

Although Example 2 is specific and has good intentions, it is a bad thesis statement because it is not arguable. No one in a modern, rationally-minded audience would disagree and say that racism should be promoted in school. Therefore this thesis tells its readers what they already know, which makes it useless.

Although Example 3 is specific and arguable, it is a bad thesis because it is not significant as is. Nobody cares, or at least it has no important effect on people’s lives or in society.

Good Thesis Statements

Now here are some good thesis statements with brief explanations.

This is highly arguable (you might disagree with it already), and that is a good thing: it is arguable while still being rationally able to defend itself (by offering at least two reasons as support). It is also good because it is very specific and because it is significant—it would matter whether America incorporates this idea.

This is a special type of thesis called a “causal analysis.” It argues why something is the way it is, and it is specific (it says exactly what and why), significant (it matters to many), and arguable (this might not be the reason, or at least not a main one—or it might be).

Improving the Thesis Statement

Early argument thesis statement

You’re already off to a good start: this thesis makes a claim, it demonstrates some knowledge or authority, and includes two sides to the issue. How can you make it better? Remember, you have to be able to write a paper in support of your thesis, so the more detailed, concrete, and developed your thesis is, the better. Here are a couple of suggestions for improving any thesis:

1. Define your terms
2. Develop the parts of your thesis so it answers as many who, what, when, where, how, and why questions as possible

Defining your terms

In your draft or working thesis above, are there any terms that would benefit from more definition? What do you mean by people, for example? Can that word be replaced with young people, teenagers, or young adults? If you replaced people with these more specific terms, couldn’t you also then write your paper with more authority, as you are one of the people you’re writing about?

You might also define “can’t seem to live without,” which sounds good initially but is too general without explanation, with something more exact that appeals to your reader and can be supported with evidence or explained at greater length in your paragraphs: people “use their phones in the classrooms, at the dinner table, and even in restroom stalls.”

Make sure your thesis statement answers questions

Your thesis is a snapshot or summary of your paper as a whole. Thus, you want your thesis to be something you can unfold or unpack or develop into a much longer work. And if your thesis makes a claim, that means it also answers a question. Thus, you want your thesis to answer or discuss the question as deeply and fully as possible. You can do this grammatically by adding prepositional phrases and “because” clauses that bring out the specifics of your thinking and tell your reader who, what, when, where, how, and/or why:

“Teenagers and young adults seem to use their phones everywhere—in the classroom, at the dinner table, even in restroom stalls—because they want to stay connected to their friends and peers at all times, but I think spending that much time online is detrimental to their social skills and mental health.”

Notice that this thesis, while not substantially different from the draft or working thesis you began with, has been substantially revised to be more specific, supported, and authoritative. It lays out an organized argument for a convincing paper. Because it is so complete and specific it can be easily changed if you find research that contradicts your claim or if you change your mind about the topic as you write and reflect:

“Teenagers and young adults seem to use their phones everywhere—in the classroom, at the dinner table, even in restroom stalls—because they want to stay connected to their friends and peers at all times, and research suggests that this connection has primarily positive psychological and emotional benefits.”

Common Errors

Although constructing a thesis according to the above characteristics and steps will help you avoid the biggest problems, it’s still possible to run into a few common errors.

One such error is confusing an essay’s subject with a thesis, which is a claim or position about that subject. This is particularly problematic when students focus on arguing for the existence of what they believe to be facts. Some are easy enough to identify and revise, such as “America still allows the death penalty in some places.” This does not yet take a position on that subject, but a student could easily enough reach one once this error is noticed. Others create more complicated problems. Consider these examples: “Aliens exist.” Or: “Ghosts are real.” These might seem to fit the characteristics of good thesis statements above, but they do not. That is because these are merely subjects for the writer. The writer who has asserted these as facts in the world has, by doing so, not yet claimed them and has failed to take a position on them. Such a position might be what the writer thinks universities or research institutions should do with their budgets based on evidence of the existence of aliens, or ghosts. But taking such positions and supporting them often becomes quite complex and shaky, especially when directed toward academic audiences, which is why these kinds of “secret facts about the universe” subjects are too problematic for student writers to handle successfully. Some professors simply ban them to help students avoid inevitable trouble.

Another such error is confusing a self-referential announcement with a thesis. This kind of announcement often looks something like, “My essay will be about…,” or, “I think that…,” or, “For this assignment, I will tell you about…,” or something in the essay that similarly refers to itself as an essay. Sometimes the revision is simple: eliminate the needless phrase. Consider this example: “I think that the teaching of Shakespeare should be banned in American schools.” As it stands, it is not a thesis because it is a simple announcement about the writer, but simply removing “I think that” makes it a thesis, for it then makes an arguable, specific, and significant claim that would need to be supported. In other cases, needless self-referential announcements such as “my essay will be about” hide the fact that the student has just confused the subject with a thesis, as noted above. So, “My essay will be about the death penalty” is only a subject, not yet a thesis.

Another common error is confusing the role of personal opinion in a thesis. Some students come to believe that personal opinions are banned in English class essays, or college writing in general, but this is self-evidently wrong. The only way to make a thesis arguable is to take some opinion-based position on a matter. Opinions are therefore required in constructing a good thesis. But the simple statement of a personal opinion is rarely sufficient for a thesis; instead, it often becomes a mere statement of taste, which is neither arguable nor significant. “I love pineapple on pizza, no matter what anyone else says,” is just a statement of personal opinion, which means it can’t be arguable, nor is it significant. “I hate that Americans only get two options when voting for president” is just a personal opinion as it stands, but this one has the potential for a good thesis with just a little more revision.

One of the most difficult errors to face is confusing personal beliefs or convictions with claims. It is not necessary for college for student writers to personally believe all the ideas they explore in their essays, but this is hard for some students to comprehend or accept. Many students come to college having worked only on figuring out what they believe to be right and wrong, true and false, good and bad. That is fine up to a point, but it places the student in the prison of a singular perspective. One great aim of a true college education is, as Oscar Wilde put it, the ability to “play gracefully with ideas” rather than being stuck in “the violence of opinion merely.” So essays can serve as an opportunity to work through ideas that you have not necessarily given your heart, mind, and soul over to. This kind of serious play enriches you, makes you more perceptive, adaptable, and confident, and is indeed one main reason to bother writing at all. So avoid the temptation to write only about your convictions, or to fear any challenge to them. Instead, “play gracefully with ideas.”

These ideas will continue to be expanded upon as you read on and develop as an academic writer. However, it is important to build and practice a strong fondation.