Throughout your academic career, you'll be asked to write papers in which you compare and contrast two things: two texts, two theories, two historical figures, two scientific processes, and so on. "Classic" compare-and-contrast papers, in which you weight A and B equally, may be about two similar things that have crucial differences (two pesticides with different effects on the environment) or two similar things that have crucial differences, yet turn out to have surprising commonalities (two politicians with vastly different world views who voice unexpectedly similar perspectives on sexual harassment).
In the "lens" (or "keyhole") comparison, in which you weight A less heavily than B, you use A as a lens through which to view B. Just as looking through a pair of glasses changes the way you see an object, using A as a framework for understanding B changes the way you see B. Lens comparisons are useful for illuminating, critiquing, or challenging the stability of a thing that, before the analysis, seemed perfectly understood. Often, lens comparisons take time into account: earlier texts, events, or historical figures may illuminate later ones, and vice versa.
Faced with a daunting list of seemingly unrelated similarities and differences, you may feel confused about how to construct a paper that isn't just a mechanical exercise in which you first state all the features that A and B have in common, and then state all the ways in which A and B are different. Predictably, the thesis of such a paper is usually an assertion that A and B are very similar yet not so similar after all. To write a good compare-and-contrast paper, you must take your raw data—the similarities and differences you've observed—and make them cohere into a meaningful argument. Here are the five elements required.
Frame of Reference. This is the context within which you place the two things you plan to compare and contrast; it is the umbrella under which you have grouped them. The frame of reference may consist of an idea, theme, question, problem, or theory; a group of similar things from which you extract two for special attention; biographical or historical information. The best frames of reference are constructed from specific sources rather than your own thoughts or observations. Thus, in a paper comparing how two writers redefine social norms of masculinity, you would be better off quoting a sociologist on the topic of masculinity than spinning out potentially banal-sounding theories of your own. Most assignments tell you exactly what the frame of reference should be, and most courses supply sources for constructing it. If you encounter an assignment that fails to provide a frame of reference, you must come up with one on your own. A paper without such a context would have no angle on the material, no focus or frame for the writer to propose a meaningful argument.
Grounds for Comparison. Let's say you're writing a paper on global food distribution, and you've chosen to compare apples and oranges. Why these particular fruits? Why not pears and bananas? The rationale behind your choice, the grounds for comparison, lets your reader know why your choice is deliberate and meaningful, not random. For instance, in a paper asking how the "discourse of domesticity" has been used in the abortion debate, the grounds for comparison are obvious; the issue has two conflicting sides, pro-choice and pro-life. In a paper comparing the effects of acid rain on two forest sites, your choice of sites is less obvious. A paper focusing on similarly aged forest stands in Maine and the Catskills will be set up differently from one comparing a new forest stand in the White Mountains with an old forest in the same region. You need to indicate the reasoning behind your choice.
Thesis. The grounds for comparison anticipates the comparative nature of your thesis. As in any argumentative paper, your thesis statement will convey the gist of your argument, which necessarily follows from your frame of reference. But in a compare-and-contrast, the thesis depends on how the two things you've chosen to compare actually relate to one another. Do they extend, corroborate, complicate, contradict, correct, or debate one another? In the most common compare-and-contrast paper—one focusing on differences—you can indicate the precise relationship between A and B by using the word "whereas" in your thesis:
Whereas Camus perceives ideology as secondary to the need to address a specific historical moment of colonialism, Fanon perceives a revolutionary ideology as the impetus to reshape Algeria's history in a direction toward independence.
Whether your paper focuses primarily on difference or similarity, you need to make the relationship between A and B clear in your thesis. This relationship is at the heart of any compare-and-contrast paper.
Organizational Scheme. Your introduction will include your frame of reference, grounds for comparison, and thesis. There are two basic ways to organize the body of your paper.
- In text-by-text, you discuss all of A, then all of B.
- In point-by-point, you alternate points about A with comparable points about B.
If you think that B extends A, you'll probably use a text-by-text scheme; if you see A and B engaged in debate, a point-by-point scheme will draw attention to the conflict. Be aware, however, that the point-by- point scheme can come off as a ping-pong game. You can avoid this effect by grouping more than one point together, thereby cutting down on the number of times you alternate from A to B. But no matter which organizational scheme you choose, you need not give equal time to similarities and differences. In fact, your paper will be more interesting if you get to the heart of your argument as quickly as possible. Thus, a paper on two evolutionary theorists' different interpretations of specific archaeological findings might have as few as two or three sentences in the introduction on similarities and at most a paragraph or two to set up the contrast between the theorists' positions. The rest of the paper, whether organized text- by-text or point-by-point, will treat the two theorists' differences.
You can organize a classic compare-and-contrast paper either text-by-text or point-by-point. But in a "lens" comparison, in which you spend significantly less time on A (the lens) than on B (the focal text), you almost always organize text-by-text. That's because A and B are not strictly comparable: A is merely a tool for helping you discover whether or not B's nature is actually what expectations have led you to believe it is.
Linking of A and B. All argumentative papers require you to link each point in the argument back to the thesis. Without such links, your reader will be unable to see how new sections logically and systematically advance your argument. In a compare-and contrast, you also need to make links between A and B in the body of your essay if you want your paper to hold together. To make these links, use transitional expressions of comparison and contrast (similarly, moreover, likewise, on the contrary, conversely, on the other hand) and contrastive vocabulary (in the example below, Southerner/Northerner).
As a girl raised in the faded glory of the Old South, amid mystical tales of magnolias and moonlight, the mother remains part of a dying generation. Surrounded by hard times, racial conflict, and limited opportunities, Julian, on the other hand, feels repelled by the provincial nature of home, and represents a new Southerner, one who sees his native land through a condescending Northerner's eyes.
Copyright 1998, Kerry Walk, for the Writing Center at Harvard University
What is a comparative essay?
A comparative essay asks that you compare at least two (possibly more) items. These items will differ depending on the assignment. You might be asked to compare
- positions on an issue (e.g., responses to midwifery in Canada and the United States)
- theories (e.g., capitalism and communism)
- figures (e.g., GDP in the United States and Britain)
- texts (e.g., Shakespeare’s Hamletand Macbeth)
- events (e.g., the Great Depression and the global financial crisis of 2008–9)
Although the assignment may say “compare,” the assumption is that you will consider both the similarities and differences; in other words, you will compare and contrast.
Make sure you know the basis for comparison
The assignment sheet may say exactly what you need to compare, or it may ask you to come up with a basis for comparison yourself.
- Provided by the essay question: The essay question may ask that you consider the figure of the gentleman in Charles Dickens’s Great Expectations and Anne Brontë’s The Tenant of Wildfell Hall. The basis for comparison will be the figure of the gentleman.
- Developed by you: The question may simply ask that you compare the two novels. If so, you will need to develop a basis for comparison, that is, a theme, concern, or device common to both works from which you can draw similarities and differences.
Develop a list of similarities and differences
Once you know your basis for comparison, think critically about the similarities and differences between the items you are comparing, and compile a list of them.
For example, you might decide that in Great Expectations, being a true gentleman is not a matter of manners or position but morality, whereas in The Tenant of Wildfell Hall, being a true gentleman is not about luxury and self-indulgence but hard work and productivity.
The list you have generated is not yet your outline for the essay, but it should provide you with enough similarities and differences to construct an initial plan.
Develop a thesis based on the relative weight of similarities and differences
Once you have listed similarities and differences, decide whether the similarities on the whole outweigh the differences or vice versa. Create a thesis statement that reflects their relative weights. A more complex thesis will usually include both similarities and differences. Here are examples of the two main cases:
- Differences outweigh similarities:
While Callaghan’s “All the Years of Her Life” and Mistry’s “Of White Hairs and Cricket” both follow the conventions of the coming-of-age narrative, Callaghan’s story adheres more closely to these conventions by allowing its central protagonist to mature. In Mistry’s story, by contrast, no real growth occurs.
- Similarities outweigh differences:
Although Darwin and Lamarck came to different conclusions about whether acquired traits can be inherited, they shared the key distinction of recognizing that species evolve over time.
Come up with a structure for your essay
- Alternating method: Point-by-point patternIn the alternating method, you find related points common to your central subjects A and B, and alternate between A and B on the basis of these points (ABABAB …). For instance, a comparative essay on the French and Russian revolutions might examine how both revolutions either encouraged or thwarted innovation in terms of new technology, military strategy, and the administrative system.
A Paragraph 1 in body new technology and the French Revolution B Paragraph 2 in body new technology and the Russian Revolution A Paragraph 3 in body military strategy and the French Revolution B Paragraph 4 in body military strategy and the Russian Revolution A Paragraph 5 in body administrative system and the French Revolution B Paragraph 6 in body administrative system and the Russian Revolution
Note that the French and Russian revolutions (A and B) may be dissimilar rather than similar in the way they affected innovation in any of the three areas of technology, military strategy, and administration. To use the alternating method, you just need to have something noteworthy to say about both A and B in each area. Finally, you may certainly include more than three pairs of alternating points: allow the subject matter to determine the number of points you choose to develop in the body of your essay.
When do I use the alternating method? Professors often like the alternating system because it generally does a better job of highlighting similarities and differences by juxtaposing your points about A and B. It also tends to produce a more tightly integrated and analytical paper. Consider the alternating method if you are able to identify clearly related points between A and B. Otherwise, if you attempt to impose the alternating method, you will probably find it counterproductive.
- Block method: Subject-by-subject patternIn the block method (AB), you discuss all of A, then all of B. For example, a comparative essay using the block method on the French and Russian revolutions would address the French Revolution in the first half of the essay and the Russian Revolution in the second half. If you choose the block method, however, do not simply append two disconnected essays to an introductory thesis. The B block, or second half of your essay, should refer to the A block, or first half, and make clear points of comparison whenever comparisons are relevant. (“Unlike A, B . . .” or “Like A, B . . .”) This technique will allow for a higher level of critical engagement, continuity, and cohesion.
A Paragraphs 1–3 in body How the French Revolution encouraged or thwarted innovation B Paragraphs 4–6 in body How the Russian Revolution encouraged or thwarted innovation
When do I use the block method? The block method is particularly useful in the following cases:
- You are unable to find points about A and B that are closely related to each other.
- Your ideas about B build upon or extend your ideas about A.
- You are comparing three or more subjects as opposed to the traditional two.