lesson on writing thesis statements

Fun Ways to Teach Thesis Statements for High Schoolers

• Trent Lorcher
• Categories : High school english lesson plans grades 9 12
• Tags : High school lesson plans & tips

The Thesis Statement Dilemma

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On my way out the door, I noticed all the English teachers were busily grading essays . “Hey, Bob,” I shouted as I stumbled into his classroom, “Not done with those essays yet? I finished mine an hour ago.” “How’d you grade them so fast?” he asked. “It’s simple,” I responded, “I didn’t teach my students how to write a thesis statement, so grading their essays was easy. I just gave them all F’s. While you guys waste your time teaching valuable lessons and then having to actually grade their essays, we watch movies.” “So, none of your students know anything about writing?” “Nope.” “You’re a disgrace!” Bob shouted. He moved toward me, stapler in hand. Next thing I remember, I was surrounded by angry tax-payers. Angry tax-payer #1 shouted, “Get up you thief! Our tax dollars pay your salary and you’re supposed to teach the children of this great state how to write! I suggest you start doing your job tomorrow morning, or you’ll pay dearly!” The angry tax-payer clubbed me with a ruler and knocked me out again. When I awoke, Bob was asking me if I wanted to learn some fun ways to teach thesis statements to my students. I now share these ideas with you.

What to Do Before Writing

• You must begin with a topic question. If your instructor has assigned an essay question to answer, this step has been done for you. If you are doing a research paper, take time to come up with a good topic question.
• You must form an opinion and state it clearly. Do not be wishy-washy.
• Be sure you have approached your evidence fairly, without bias.
• Consider both sides of a controversial issue.
• Once you’ve established the topic question, a clear position, and objectivity, you’re ready to write a thesis statement.

What Is a Thesis Statement?

Students have heard the term thesis statement hundreds of times by the time they reach high school, yet have only a vague understanding of what one is. Your first responsibility is to teach them that a thesis statement:

• Presents your opinions or thoughts on a subject or an issue. You cannot write an essay without one.
• Must contain a subject + an opinion.
• Answers the topic question (the one you created or the one presented to you by the instructor).

TIP : A thesis statement should never contain the following: in my opinion, I think, I believe , etc. Tell them that the entire thesis represents what they believe. However, it may be helpful for students to begin their thesis statement rough draft with i_n my opinion, I believe, or I think_ to make sure they are expressing their thoughts or opinion on a specific subject or issue. When writing the final draft, simply eliminate those phrases.

How to Teach Students to Write A Thesis Statement

It is important to demonstrate the difference between good and bad thesis statements. These instructions will help you teach the former:

• Good Example: Success is a result of doing the right things consistently.
• Bad Example: In a world full of success gurus and books about success, it becomes ever so more important to delineate the one trait that ultimately determines success: doing the right things consistently.
• Good example: The key to successful dieting is focusing on a specific goal.
• Bad example: T_he key to successful dieting is focusing on a specific goal, which is also the key to successfully running a business and coaching a football team._
• Good example: Lebron James’ ability to score, pass, and rebound make him the league’s most valuable player.
• Bad example: Does Lebron James’ ability to score, pass, and rebound make him the league’s most valuable player?
• Bad Example: Lebron James’ ability to score, pass, and rebound just might make him the league’s most valuable player.

Write It Out

Knowing what to do and actually doing it are not the same thing. The following steps will help you and your students write clearly:

• Write several trial statements: writing is a process - you don’t have to get it perfect on the first try. Teach your students to revise their work .
• If you’re having trouble deciding which side to take on a controversial issue, write your thesis statement from two different points of view. Then decide which one better represents your opinion. If you still can’t decide, list facts on both sides of the issue and decide which facts make a more persuasive argument.

Evaluating the Work

You’ve spent a lot of valuable classroom time teaching thesis statements, but your lesson is not finished without teaching your students how to evaluate their writing. Instruct students to use the following questions to analyze their statement:

• Good example: Romeo’s prior feelings for Rosaline diminish the credibility of his love for Juliet.
• Bad example: This essay examines whether or not Romeo’s prior feelings for Rosaline diminish his love for Juliet.
• Good example: Juliet was not the first woman to capture Romeo’s fancy; she was, however, the one who affected him the most.
• Bad example: Romeo loved Juliet with all his heart, but he loved Rosaline too. It could be argued they were both his favorite.
• Bad example: Immature, whiny, male-pig Romeo, a male harlot, ruined precious Juliet whom he loved no more than Rosaline.

More Teaching Ideas

The following activities will help reinforce the concept.

• Have students create thesis statements on a slice of paper. Collect the paper and read them to the class. Have the class vote on them.
• Do the same activity, but use individualized white boards to record judgments .
• Read the thesis statements anonymously. The ones that do not qualify get tossed in the garbage can (visualizing what happens to writing is powerful). Give students a chance to rewrite until they get it right.
• Write random topics on the board and have groups of students brainstorm good ones.
• Make the thesis statements part of a writing challenge .
• Require that students get thesis statements approved before writing an essay.

Click here for a complete 1st semester curriculum map for language arts with lesson plans and links. I hope you learned some fun ways to teach thesis statements to your students. If you have other tips, be sure to leave them in the comments. Image by  Nicholas Jackson  from  Pixabay

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Activities to Teach How to Write A Thesis Statement

Research Writing , Secondary Literacy , Writing

If there’s any literacy skill you would want your English Language Arts students to master, it would probably be how to write a thesis statement . If you want to teach your students how to write powerful, eloquent, and exceptionally captivating thesis statements, then you’ll love the activities in this article.

The key to any good essay is a strong thesis statement. A strong thesis statement sets the tone and clarifies the author’s purpose : it tells you the writer’s opinion, along with the level of thought and criticism that has gone into formulating it.

A strong thesis statement also creates an alluring introduction paragraph. This makes each paper in your grading pile a lot more inviting.

How do you teach students to write a thesis statement to make their audience continue reading? This blog post explores six activities to teach how to write a thesis statement.

1. Differentiate Between Strong and Weak Thesis Statements

Writing a thesis statement might be a new skill for your students. Thesis statements are often taught as a topic sentence or the “whole essay boiled down into one sentence.” This can be a challenging concept for your students to grasp.

To teach how to write a thesis statement, have a discussion about what makes a strong thesis statement. You can turn this into a collaborative lesson by brainstorming clarifying statements ; these statements dictate what a thesis is and is not.

For example: “ A proper thesis statement is written in one sentence ,” or “ a proper thesis statement is directly related to the rest of the essay .” This is a great opportunity to teach students the difference between concepts like a “topic sentence” or a “hook.”

Your students can use this free bookmark to differentiate between a strong thesis statement and a weak one. This slideshow lesson also explores clarifying statements with detailed examples.

2. Evaluate Thesis Statement Examples

Now that students have plenty of guidelines, challenge their understanding by evaluating thesis statement examples . You can use thesis statement examples from past students’ essays. You can even write your own examples based on the clarifying statements you create with your class.

If you’re open to your students receiving constructive, anonymous criticism , you can even have them write a thesis statement and evaluate each one as a class. I’ve had success with providing students with a thesis statement topic and having them write a thesis statement. Then, I prompt them to swap with their elbow partner to offer feedback.

If you’d rather provide a comprehensive list of thesis statements that reflect the common errors you would typically see in students’ essays, there are several student examples in this introductory lesson on how to write a thesis statement – this is one of my favourite activities for teaching thesis statement writing!

3. Provide a Thesis Statement Template

One of the easiest ways to teach how to write a thesis statement is to offer a thesis statement template . There are a variety of thesis statement templates that students can use as a framework for their essays. I start with a basic template that involves the three parts of a thesis statement: a topic, position, and evidence . I then demonstrate to students how they can create variations of this template, depending on which order they introduce each part. You can find examples for each template in these thesis statement handouts .

You can also introduce a few sentence styles to your students. These styles scaffold eloquent thesis statements. They also offer students the space to articulate their thoughts without exceeding the one-sentence limit.

Sentence Styles for the Three Parts of a Thesis Statement

Here are a few sentence styles that incorporate the three parts of a thesis statement. Each style also includes an example written by a real student:

• Style A : “Noun phrase; Noun phrase; Noun phrase – Independent Clause” Example: “The promotion of hygiene; the presence of medical professionals; the prevention of death – these are all reasons why supervised injection services are an important facet of public health.”
• Style B : If (subject + verb + object phrase), if (subject + verb + object phrase ), if (subject + verb + object phrase ), then (independent clause) Example: “If taxpayers do not wish to have their money allocated to cruelty, if more than 100 million animals die from animal testing a year, if alternatives to animal testing exist, then governments should ban the practice of testing on animals.”
• Style C : Independent clause: subject + verb, subject + verb, subject + verb Example: “College education should be entirely funded by the government: student debt would be eliminated, education would not be commodified, and access to education would not be exclusive to privileged people.”

All of these sentence styles are outlined in these practice worksheets for how to write a thesis statement, with writing prompts to reinforce each thesis statement template through repeated practice.

4. Daily Practice Activities to Teach How to Write a Thesis Statement

One of the most effective ways to teach how to write a thesis statement is through repeated practice. You can do this by incorporating daily bell ringers into your persuasive writing unit. To assign this activity, I provide students with three topics to choose from. I then prompt them to develop an opinion and write a thesis statement for one.

I’ll also include bell ringers that provide a thesis statement that students need to evaluate. Students really enjoy these drills! They get the opportunity to develop opinions on interesting topics, and many of them choose to explore these ideas as the subject of their final research paper.

If you’re looking for pre-made worksheets with thesis statement activities, these daily thesis statement bell ringers include one month’s worth of thesis statement prompts, graphic organizers, and templates in both digital and ready-to-print format.

5. Use a Self-Assessment Thesis Statement Anchor Chart

You can provide students with a thesis statement anchor chart to reference the guidelines and rules they’ve learned. A personalized anchor chart is best – like this free thesis statement bookmark – so that students can have it on hand while they are reading and writing.

You can distribute the anchor chart at the beginning of your research paper unit. Students can refer to it while evaluating thesis statement examples or completing daily practice activities. A thesis statement anchor chart has been a complete game-changer in my classroom, and I’m pleased to learn that many of my students have held on to these after completing my course.

6. Provide Engaging Thesis Statement Topics

You can collaborate with your students to generate an engaging list of good topics for thesis statements. Start by writing down every topic that your students suggest. Then, you can narrow this list down to avoid broad, far-reaching thesis statements that lead to a watered-down essay. When I make this list with my students, we end up with topics that are truly engaging for them. I also have the opportunity to clarify which topics might be a little too vague or broad for an exceptional essay.

For example, students often suggest topics like “racism” or “the problem with school.” These are learning opportunities to demonstrate to students that a great thesis statement is the essential starting point for an even greater essay.

To elaborate, a topic like racism has different implications all over the world. It is far too complex to explore in a single, 750-word essay. Instead, we work together to narrow this topic down to something like “racism in the media,” or even better, “representation in Hollywood.”

Additionally, a topic like “the problem with school” is more of a conclusion. To solve this, we work backward to identify some of the aspects of our school that make it an obstacle . This can include uniforms, early starts, or cell phone policies. This process leads students to a more concise topic, like “cell phone policies in twenty-first-century schools.”

If you’re looking for engaging thesis statement topics to inspire your students, I’ve included a list of 75 argumentative essay topics in this practice unit for how to write a thesis statement .

Tying it All Together

There are plenty of fun thesis statement activities and practice lessons that you can incorporate into your curriculum. Give thesis statements the love and attention they deserve in the classroom – after all, they truly are the most important part of a research essay.

All of the worksheets, lessons, and activities explored in this blog post are included in Mondays Made Easy’s unit for teaching how to write a thesis statement . This bundle has everything you need to teach your students how to master their thesis statements and apply these essential literacy skills to their writing.

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• Thesis Statement

Thesis Statements: How to Identify and Write Them

Students read about and watch videos about how to identify and write thesis statements. 

Then, students complete two exercises where they identify and write thesis statements. 

*Conditions of Use: While the content on each page is licensed under an  Attribution Non-Commercial Share Alike  license, some pages contain content and/or references with other types of licenses or copyrights. Please look at the bottom of each page to view this information. 

Learning Objectives

By the end of these readings and exercises, students will be able to: 

• define the term thesis statement
• read about two recommended thesis statement models 
• practice identifying thesis statements in other texts
• write your own effective thesis statements

Attributions:

• The banner image is licensed under  Adobe Stock .
• The untitled image of a detective by Peggy_Marco is licensed under Pixabay . 

What is a thesis statement?

The thesis statement is the key to most academic writing. The purpose of academic writing is to offer your own insights, analyses, and ideas—to show not only that you understand the concepts you’re studying, but also that you have thought about those concepts in your own way and agreed or disagreed, or developed your own unique ideas as a result of your analysis. The  thesis statement  is the one sentence that encapsulates the result of your thinking, as it offers your main insight or argument in condensed form.

We often use the word “argument” in English courses, but we do not mean it in the traditional sense of a verbal fight with someone else. Instead, you “argue” by taking a position on an issue and supporting it with evidence. Because you’ve taken a position about your topic, someone else may be in a position to disagree (or argue) with the stance you have taken. Think about how a lawyer presents an argument or states their case in a courtroom—similarly, you want to build a case around the main idea of your essay. For example, in 1848, when Elizabeth Cady Stanton drafted “The Declaration of Sentiments,” she was thinking about how to convince New York State policymakers to change the laws to allow women to vote. Stanton was making an argument.

Some consider all writing a form of argument—or at least of persuasion. After all, even if you’re writing a letter or an informative essay, you’re implicitly trying to persuade your audience to care about what you’re saying. Your thesis statement represents the main idea—or point—about a topic or issue that you make in an argument. For example, let’s say that your topic is social media. A thesis statement about social media could look like one of the following sentences:

• Social media harms the self-esteem of American pre-teen girls.
• Social media can help connect researchers when they use hashtags to curate their work.
• Social media tools are not tools for social movements, they are marketing tools.

Please take a look at this video which explains the basic definition of a thesis statement further (we will be building upon these ideas through the rest of the readings and exercises): 

Attributions: 

• The content about thesis statements has been modified from English Composition 1 by Lumen Learning and Audrey Fisch et al. and appears under an  Attribution 4.0 International (CC BY 4.0) license. 
• The video "Purdue OWL: Thesis Statements" by the Purdue University Online Writing Lab appears under a YouTube license . 

The Two-Story Model (basic)

First, we will cover the two-story thesis statement model. This is the most basic model, but that doesn't mean it's bad or that you shouldn't use it. If you have a hard time with thesis statements or if you just want to keep things simple, this model is perfect for you. Think of it like a two-story building with two layers. 

A basic thesis sentence has two main parts:

• Topic:  What you’re writing about
• Angle:  What your main idea is about that topic, or your claim

Examples: 

When you read all of the thesis statement examples, can you see areas where the writer could be more specific with their angle? The more specific you are with your topic and your claims, the more focused your essay will be for your reader.

Thesis:  A regular exercise regime leads to multiple benefits, both physical and emotional.

• Topic:  Regular exercise regime
• Angle:  Leads to multiple benefits

Thesis:  Adult college students have different experiences than typical, younger college students.

• Topic:  Adult college students
• Angle:  Have different experiences

Thesis:  The economics of television have made the viewing experience challenging for many viewers because shows are not offered regularly, similar programming occurs at the same time, and commercials are rampant.

• Topic:  Television viewing
• Angle:  Challenging because shows shifted, similar programming, and commercials

Please watch how Dr. Cielle Amundson demonstrates the two-story thesis statement model in this video:

• The video "Thesis Statement Definition" by  Dr. Cielle Amundson  appears under a YouTube license . 

The Three-Story Model (advanced)

Now, it's time to challenge yourself. The three-story model is like a building with three stories. Adding multiple levels to your thesis statement makes it more specific and sophisticated. Though you'll be trying your hand with this model in the activity later on, throughout our course, you are free to choose either the two-story or three-story thesis statement model. Still, it's good to know what the three-story model entails. 

A thesis statement can have three parts: 

• Relevance : Why your argument is meaningful

Conceptualizing the Three-Story Model: 

A helpful metaphor based on this passage by Oliver Wendell Holmes Sr.:

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.

One-story theses state inarguable facts. Two-story theses bring in an arguable (interpretive or analytical) point. Three-story theses nest that point within its larger, compelling implications. 

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 up the third story by articulating why the point you make matters beyond its particular topic or case.

Though the three-story thesis statement model appears a little bit differently in this video, you can still see how it follows the patterns mentioned within this section: 

• The content about thesis statements has been modified from Writing in College by Amy Guptill from Milne Publishing and appears under an  Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) license. 
• The video "How to Write a STRONG Thesis Statement" by Scribbr  appears under a YouTube license . 

Identifying Thesis Statements

You’ll remember that the first step of the reading process, previewing ,  allows you to get a big-picture view of the document you’re reading. This way, you can begin to understand the structure of the overall text. The most important step of understanding an essay or a book is to find the thesis statement.

Pinpointing a Thesis Statement

A thesis consists of a specific topic and an angle on the topic. All of the other ideas in the text support and develop the thesis. The thesis statement is often found in the introduction, sometimes after an initial “hook” or interesting story; sometimes, however, the thesis is not explicitly stated until the end of an essay. Sometimes it is not stated at all. In those instances, there is an  implied thesis statement.  You can generally extract the thesis statement by looking for a few key sentences and ideas.

Most readers expect to see the point of your argument (the thesis statement) within the first few paragraphs. This does not mean that it has to be placed there every time. Some writers place it at the very end, slowly building up to it throughout their work, to explain a point after the fact. Others don’t bother with one at all but feel that their thesis is “implied” anyway. Beginning writers, however, should avoid the implied thesis unless certain of the audience. Almost every professor will expect to see a clearly discernible thesis sentence in the introduction.

Shared Characteristics of Thesis Statements:

• present the main idea
• are one sentence
• tell the reader what to expect
• summarize the essay topic
• present an argument
• are written in the third person (does not include the “I” pronoun)

The following “How to Identify a Thesis Statement” video offers advice for locating a text’s thesis statement. It asks you to write one or two sentences that summarize the text. When you write that summary, without looking at the text itself, you’ve most likely paraphrased the thesis statement.

You can view the  transcript for “How to Identify the Thesis Statement” here (download).

Try it! 

Try to check your thesis statement identification skills with this interactive exercise from the Excelsior University Online Writing Lab. 

• The video "How to Identidy the Thesis Statement" by  Martha Ann Kennedy  appears under a YouTube license . 
• The "Judging Thesis Statements" exercise from the Purdue University Online Writing Lab appears under an Attribution 4.0 International (CC BY 4.0) license. 

Writing Your Own Thesis Statements

A thesis statement is a single sentence (or sometimes two) that provides the answers to these questions clearly and concisely. Ask yourself, “What is my paper about, exactly?” Answering this question will help you develop a precise and directed thesis, not only for your reader, but for you as well.

Key Elements of an Effective Thesis Statement: 

• A good 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 like “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 the five-paragraph form. Good enough! When they can, high school teachers nudge students to develop arguments that are less obvious and more engaging. College instructors, though, fully expect you to produce something more developed.
• A good 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 a paper. A thesis like “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 like “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 good thesis is well specified. Some student writers fear that they’re giving away the game if they specify their thesis up front; 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 papers, 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 good thesis includes implications. Suppose your assignment is to write a paper 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. 2  That’s a strong, insightful, arguable, well specified thesis. But which of these thesis statements do you find more engaging?

How Can You Write Your Thesis Statements?

A good basic structure for a thesis statement is “they say, I say.” What is the prevailing view, and how does your position differ from it? However, avoid limiting the scope of your writing with an either/or thesis under the assumption that your view must be strictly contrary to their view.

• focus on one, interesting idea
• choose the two-story or three-story model
• be as specific as possible
• write clearly
• have evidence to support it (for later on)

Thesis Statement Examples: 

• Although many readers believe Romeo and Juliet to be a tale about the ill fate of two star-crossed lovers, it can also be read as an allegory concerning a playwright and his audience.
• The “War on Drugs” has not only failed to reduce the frequency of drug-related crimes in America but actually enhanced the popular image of dope peddlers by romanticizing them as desperate rebels fighting for a cause.
• The bulk of modern copyright law was conceived in the age of commercial printing, long before the Internet made it so easy for the public to compose and distribute its own texts. Therefore, these laws should be reviewed and revised to better accommodate modern readers and writers.
• The usual moral justification for capital punishment is that it deters crime by frightening would-be criminals. However, the statistics tell a different story.
• If students really want to improve their writing, they must read often, practice writing, and receive quality feedback from their peers.
• Plato’s dialectical method has much to offer those engaged in online writing, which is far more conversational in nature than print.

You can gather more thesis statement tips and tricks from this video titled "How to Create a Thesis Statement" from the Florida SouthWestern State College Academic Support Centers: 

• The video "How to Create a Thesis Statement" by the Florida SouthWestern State College Academic Support Centers appears under a YouTube license . 

Additional, Optional Resources

If you feel like you might need more support with thesis statements, please check out these helpful resources for some extra, optional instruction: 

• "Checklist for a Thesis Statement"  from the  Excelsior University Online Writing Lab  which appears under an Attribution 4.0 International (CC BY 4.0) license. 
• "Developing Your Thesis" from Hamiliton College which appears under a copyright. 
• "Parts of a Thesis Sentence and Common Problems"  from the  Excelsior University Online Writing Lab  which appears under an Attribution 4.0 International (CC BY 4.0) license.
• "Tips and Examples for Writing Thesis Statements" from the Purdue University Writing Lab which appears under a copyright. 
• "Writing Thesis Statements & Hypotheses" by Hope Matis from Clarkson University which appears under a copyright. 
• The content about these resources has been modified from English Composition 1 by Lumen Learning and Audrey Fisch et al. and appears under an  Attribution 4.0 International (CC BY 4.0) license. 
• The content about these resources has been modified from Writing in College by Amy Guptill from Milne Publishing and appears under an  Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) license. 
• The untitled image of the books by OpenClipart-Vectors is licensed under Pixabay . 

Exercise #1: Identify Thesis Statements

Throughout the readings, we have been learning what an effective thesis statement is and what it is not. Before we even get to writing our own thesis statements, let's look for real-world examples. It's your turn to locate and identify thesis statements!

Objectives/Goals

By completeting this exercise students will be able to: 

• identify the main ideas within a text 
• summarize the main ideas within a text
• choose one sentence from the text which you believe is the thesis statement
• argue why you believe that's the true thesis statement of the text

Instructions

• Any print or online text (probably something around a page in length) will be fine for this exercise. 
• If you have trouble finding a text, I recommend looking at this collection from  88 Open Essays – A Reader for Students of Composition & Rhetoric  by Sarah Wangler and Tina Ulrich. 
• Write the title of the text that you selected and the full name(s) of the author (this is called the full citation). 
• Provide a hyperlink for that text. 
• Write one paragraph (5+ sentences) summarizing the main points of the text. 
• Write one more argumentative paragraph (5+ sentences) where you discuss which sentence (make sure it appears within quotation marks, but don't worry about in-text citations for now) you think is the author's thesis statement and why. 

Submitting the Assignment

You will be submitting Exercise #1: Identify Thesis Statements within Canvas in our weekly module. 

Please check the assignment page for deadlines and Canvas Guides to help you in case you have trouble submitting your document. 

• "88 Open Essays - A Reader for Students of Composition & Rhetoric" by Sarah Wangler and Tina Ulrich from LibreTexts appears under an  Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license. 

Exercise #2: Write Your Own Thesis Statements

Now that you've had some practice with locating and identifying thesis statements, you are ready to write some practice thesis statements yourself. 

• write a two-story thesis statement 
• write a three-story thesis statement
• reflect on your thesis statement skills
• Using the same text from Exercise #1, write a two-story thesis statement in response to that text. 
• Using the same text from Exercise #1, write a three-story thesis statement in response to that text. 
• Is it easy for you to identify thesis statements in other texts? Why or why not?
• What methods do you use to identify/locate thesis statements?
• In the past, how have you felt when you needed to write a thesis statement?
• How did you feel about writing your own thesis statements in Exercise #2?
• Which thesis statement writing strategies were the most beneficial to you? Why?
• What challenges did you face when you were writing you thesis statement for Exercise #2?

You will be submitting Exercise #2: Write Your Own Thesis Statements within Canvas in our weekly module. 

• The untitled image of the writing supplies by ptra  is licensed under Pixabay . 

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Tips and Examples for Writing Thesis Statements

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Tips for Writing Your Thesis Statement

1. Determine what kind of paper you are writing:

• An analytical paper breaks down an issue or an idea into its component parts, evaluates the issue or idea, and presents this breakdown and evaluation to the audience.
• An expository (explanatory) paper explains something to the audience.
• An argumentative paper makes a claim about a topic and justifies this claim with specific evidence. The claim could be an opinion, a policy proposal, an evaluation, a cause-and-effect statement, or an interpretation. The goal of the argumentative paper is to convince the audience that the claim is true based on the evidence provided.

If you are writing a text that does not fall under these three categories (e.g., a narrative), a thesis statement somewhere in the first paragraph could still be helpful to your reader.

2. Your thesis statement should be specific—it should cover only what you will discuss in your paper and should be supported with specific evidence.

3. The thesis statement usually appears at the end of the first paragraph of a paper.

4. Your topic may change as you write, so you may need to revise your thesis statement to reflect exactly what you have discussed in the paper.

Thesis Statement Examples

Example of an analytical thesis statement:

The paper that follows should:

• Explain the analysis of the college admission process
• Explain the challenge facing admissions counselors

Example of an expository (explanatory) thesis statement:

• Explain how students spend their time studying, attending class, and socializing with peers

Example of an argumentative thesis statement:

• Present an argument and give evidence to support the claim that students should pursue community projects before entering college

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.

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

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Thesis Statements

A thesis statement is:.

• The statement of the author’s position on a topic or subject.
• Clear, concise, and goes beyond fact or observation to become an idea that needs to be supported (arguable).
• Often a statement of tension, where the author refutes or complicates an existing assumption or claim (counterargument).
• Often answers WHY or HOW questions related to the topic at hand.

A thesis statement is NOT:

• A statement of fact or observation (no matter how astute the observation).
• A statement of personal conviction or opinion.
• A generalization or overly broad claim.

For the writer, the thesis statement:

• Helps the writer determine the essay’s real focus. What are you trying to say with the evidence presented? A thesis provides a theory to be tested by evidence.
• Serves as a planning tool. The component parts of the thesis often correspond with the essay’s topic sentences.

For the reader, the thesis statement:

• Serves as a “map” to guide the reader through the paper. In the same way the thesis helps you organize your paper, the thesis helps organize the reader’s thinking. Once a solid thesis is presented, the reader will understand that all of the evidence presented is in service of proving the thesis.
• Creates a reason to keep reading. The reader will want to discover the support behind the thesis.

If you are having trouble writing a thesis...

...ask yourself a genuine, difficult question about the topic (usually a “how” or “why” question), and state your response, even if you are not sure why you want to give that answer. Your response may very well be a workable thesis, and the pursuit of proving that answer may reveal to you more about your sources of evidence.

...think of a strong statement or observation you have made about the subject beginning with the words “In this essay, I will...” Then ask yourself why this observation is important, or “So What?” 1 Answer the question with “I believe this is because...” In the draft stage you might phrase a working thesis as the following:

In this essay, I plan to explain how Mark Twain’s Adventures of Huckleberry Finn contrasts his river and shore scenes. I believe Twain is telling us that in order to find America’s true democratic ideals one must leave “civilized” society (the shore) and go back to nature (the river).

Then revise out the “I” statements. A revised version of this thesis might look like this:

Through its contrasting river and shore scenes, Mark Twain’s Adventure’s of Huckleberry Finn suggests that to find the true expression of American democratic ideals, one must leave “civilized” society and go back to nature.

Writing in the Disciplines

Keep in mind that thesis statements vary depending on the purpose of the assignment (or type of essay), and also by discipline. Here are a few notes on the thesis statements and the purpose of writing in a few different disciplines. 2

English: “A thesis is an interpretive argument about a text or an aspect of a text. An interpretive argument is defined as one that makes a reasonable but contestable claim about a text; in other words, it is an opinion about a text that can be supported with textual evidence."

Sciences (Biology): “A well-written scientific paper explains the scientist’s motivation for doing an experiment, the experimental design and execution, and the meaning of the results... The last sentences of the introduction should be a statement of objectives and a statement of hypotheses.”

Business: “When you write in business courses, you will usually write for a specific audience. Your goal will be to communicate in a straight-forward manner and with a clear purpose." 3

History: “In historical writing, a thesis explains the words or deeds of people in the past. It shows cause and effect; it answers the question why?... A thesis must change a reader’s mind to be of value. If it presents only facts or an obvious finding, it will merely confirm what the reader already believes.”

1. This strategy comes from Writing Analytically by Jill Stephen and David Rosenwasser.

2.  The following statements on writing in the disciplines have been borrowed from the Writing Guides found at the Writing Across the Curriculum website at http://wac.gmu.edu/guides/GMU%20guides.html .

3.  From A Writer’s Reference, 6th Edition, with Writing in the Disciplines, by Diana Hacker.

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Writing a Thesis Statement Free Lesson Plan

Here is a guided writing workshop to teach students how to brainstorm and draft a thesis statement. This activity provides students an opportunity to consider their prompt and develop a claim that is effective and arguable. Three handouts are included in each download, with the teacher version also containing instructions on how to conduct the workshop.

This lesson plan can be used with any persuasive, argumentative, or research-based essay.

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Forming a Thesis Statement

Minilesson print.

The whole purpose of writing is to transfer an idea from your head into someone else's. If you can state your idea in a single, clear sentence, your reader can easily grasp it.

Use this simple formula to craft an effective thesis statement (for an essay) or topic sentence (for a paragraph).

Topic (who or what am I writing about? )

+ Focus (what specific thought or feeling do I have about my topic?)

_________________________________

= Thesis Statement (or Topic Sentence)

Here are some examples of the formula in action with different forms of writing.

Explanatory

Antibiotic resistance (topic) creates superbugs through the misuse of modern medicine (focus).

Sex and gender (topic) are related but different, one defined by biology and the other by culture (focus).

Narrative Writing

My hectic senior year of high school (topic) embodied the word overcommitment (focus) .

Your Turn Use the formula to create thesis statements for the following topics. Note: The focus is up to you.

• Career opportunities
• Community involvement
• Generational differences
• The search for colleges
• Lasting lessons of high school

From 30 in Write for College

Teacher Support:

Click to find out more about this resource.

Answers will vary.

Standards Correlations:

The State Standards provide a way to evaluate your students' performance.

• 110.38.c.10.C
• 110.39.c.10.C
• 110.38.c.5.J
• 110.39.c.5.J
• LAFS.1112.W.1.1
• LA 12.2.1.b
• LA 12.2.2.a
• LAFS.1112.W.1.2
• 110.38.c.10.A
• 110.39.c.10.A
• LAFS.1112.W.1.3

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Writing Resources

Lesson plan: writing thesis statements.

To help students identify aspects of a strong thesis statement and work on revising thesis statements

Total Estimated Time

20-25 minutes

Work Completed Before Class  

Students will have completed at least one full length writing assignment. Two introductory paragraphs from these assignments are selected to be circulated in class. Ideally these paragraphs will each have identifiable strengths and weaknesses.  

• The aims of a thesis statement
• Expresses the main idea or proposition of your essay
• Tells your reader where the essay is going
• A clear position or argument
• Justifies discussion
• Expresses one main idea which governs the essay
• Is specific

Step 2: A handout is distributed which contains the two introductory paragraphs. 

Step 3: Students are asked to think about the following questions in relation to each paragraph:

• What is the thesis?
• What are its strengths?
• What are its weaknesses?
• How well does it meet the criteria for a successful thesis?

Step 4: Provide students with some strategies for thesis revision.

• Underline all of the generic words – e.g. people, things, societies.  Consider more specific substitutes.
• Underline words or phrases that need to be unpacked. Ask yourself questions to develop these ideas. 
• Examine the verbs. Eliminate linking verbs (is, was, has been, should be) whenever possible and substitute strong action verbs.
• Check thesis for broad sweeping claims that will be difficult to support with evidence.

Step 5: Ask students to provide specific advice for each of the authors about how they could go about revising the thesis statements.

Developed at Brandeis University through a grant from the Davis Educational Foundation

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"Writing is not only something to be taught reactively through feedback on drafts, but also proactively using exercises that help students think critically about the choices they will make when constructing papers." 

Future pandemics will have the same human causes as ancient outbreaks − lessons from anthropology can help prevent them

Associate Professor of Anthropology, Macalester College

Disclosure statement

Ron Barrett does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

Macalester College provides funding as a member of The Conversation US.

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The last pandemic was bad, but COVID-19 is only one of many infectious diseases that emerged since the turn of this century.

Since 2000, the world has experienced 15 novel Ebola epidemics , the global spread of a 1918-like influenza strain and major outbreaks of three new and unusually deadly coronavirus infections: SARS , MERS and, of course, COVID-19 . Every year, researchers discover two or three entirely new pathogens : the viruses, bacteria and microparasites that sicken and kill people.

While some of these discoveries reflect better detection methods, genetic studies confirm that most of these pathogens are indeed new to the human species . Even more troubling, these diseases are appearing at an increasing rate .

Despite the novelty of these particular infections, the primary factors that led to their emergence are quite ancient. Working in the field of anthropology , I have found that these are primarily human factors: the ways we feed ourselves, the ways we live together, and the ways we treat one another. In a forthcoming book, “ Emerging Infections: Three Epidemiological Transitions from Prehistory to the Present ,” my colleagues and I examine how these same elements have influenced disease dynamics for thousands of years. Twenty-first century technologies have served only to magnify ancient challenges.

Neolithic infections

The first major wave of newly emerging infections occurred with the start of the Neolithic revolution about 12,000 years ago, when people began shifting from foraging to farming as their primary means of subsistence.

Before then, human infections tended to be mild and chronic in nature, manageable burdens of long-term parasites that people carried around from place to place. But full-time agrarian living brought the kinds of acute and virulent infections that we are familiar with today. This global shift was humanity’s first epidemiological transition.

Farming itself was not the cause. Rather, it was the major lifestyle changes associated with this new enterprise. Agriculture supplied people with high-calorie grains , but often did so at the expense of dietary diversity , resulting in compromised immunity from nutritional deficiencies.

The human population increased dramatically , and so did the number of large and densely settled communities that could sustain the transmission of deadlier pathogens.

Our ancient ancestors domesticated animals for food and labor, and their proximity to one another created opportunities for livestock diseases to evolve into human diseases.

Finally, the social hierarchies of newly agrarian societies led to disparities in the distribution of essential resources for healthy living.

These challenges of subsistence, settlement and social organization were the root causes of humanity’s first major disease transition.

Declining infections

For a dozen millennia, these patterns spread across the world like a plague of plagues. They persisted until the 19th and 20th centuries, when life expectancy rose with the precipitous decline of infectious diseases in high- and middle-income countries.

Remarkably, the greatest proportion of this decline occurred before the discovery of effective antibiotics and most of the vaccines we use today. Health improvements were mainly due to nonmedicinal factors such as better farming and food distribution methods , major sanitation projects and housing reforms in poor urban areas .

These were significant reversals in the same ancient categories – subsistence, settlement and social organization – that led to the rise of infectious diseases in the first place. They resulted in humanity’s second epidemiological transition, a significant but only partial reversal of the changes that first began in the Neolithic period.

This second pattern was not a panacea. Despite overall health improvements, chronic noninfectious conditions such as heart disease and cancer rose to become the primary causes of human mortality .

Most low-income countries experienced a later version of this transition after World War II, but their health gains from declining infections were significantly less than those of their wealthier counterparts. At the same time, their losses to noninfectious diseases rose at comparable rates. These conflicting trends have led to a “worst-of-all-worlds” scenario with respect to the health of poor societies.

It is also worth noting that the declining infections in low-income societies have depended more on affordable antimicrobial drugs . Given the emergence of drug-resistant pathogens , these medicinal buffers are proving to be little more than short-term solutions for the health consequences of poverty.

With the ability of pathogens to move freely across borders and boundaries, these consequences can quickly become everyone’s problems.

Converging infections

In recent decades, humanity’s interconnections have reached the point that nearly everyone now lives within a single global disease environment. Borders and boundaries no longer constrain the spread of distant outbreaks. The COVID-19 pandemic dramatically illustrated this new reality, when the SARS-CoV-2 virus spread around the world in only a few weeks .

The COVID-19 pandemic also highlighted the ways that infectious and noninfectious diseases can interact synergistically with one another to produce even worse outcomes than the simple sum of each disease. This is starkly illustrated by the majority of COVID-19 deaths, which occurred among people with chronic heart, lung and metabolic conditions that are common to a growing proportion of older people in populations both wealthy and poor.

When combined, these challenges have set the stage for the converging disease patterns visible today. This is the third epidemiological transition: the rise of new, virulent and drug-resistant infections occurring in a rapidly aging and highly interconnected world.

Unfortunately, the present pattern entails increasing outbreaks of new and deadly infections. The root causes of these outbreaks are in areas such as commercial agricultural practices , the urbanization of human populations and the challenges of poverty in the face of economic growth .

Despite the magnitude of these determinants, they are essentially the same issues of subsistence, settlement and social organization from 12,000 years ago. Addressing these recurring issues will do more than prepare the world for future pandemics; it will help to prevent them from happening in the first place.

• Anthropology
• Epidemiology
• Social determinants of health
• Medical anthropology
• Emerging viruses
• Emerging infections
• Emerging diseases

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