How to Write an Argumentative Essay
An argumentative essay takes one position and defends it against the strongest objection to it. Here is the structure, how to open, and an outline you can work from.
What is an argumentative essay?
An argumentative essay makes a contestable claim and defends it with evidence and reasoning. The word doing the work is *contestable*: if no informed reader could disagree with your thesis, you have written a report, and there is nothing for the body paragraphs to do.
It is distinct from a persuasive essay, though the two overlap and many courses use the terms interchangeably. The practical difference is where the weight sits. A persuasive essay may legitimately appeal to what the reader values; an argumentative essay is supposed to win on evidence, and an appeal that would not survive a hostile reader is a weakness rather than a technique.
The single thing that separates a good one from a competent one is how it treats the opposition. An essay that defeats a weak version of the other side reads as evasive to anyone who knows the topic — and markers know the topic.
Argumentative essay structure
The conventional shape below is a default, not a law. The number of body paragraphs should come from how many steps your argument actually has, not from a rule about three.
| Part | Length | What it does |
|---|---|---|
| Introduction | ~10% | A concrete hook, the minimum context needed to see why the question is live, and the thesis last. |
| Body paragraph 1 | ~15% | Your strongest independent reason, with its evidence. Lead with strength — a reader who is convinced early reads the rest generously. |
| Body paragraphs 2–3 | ~30% | The remaining steps of the argument, each depending on the one before it rather than sitting beside it. |
| Counterargument | ~20% | The strongest genuine objection, stated as its best advocate would state it — then answered on the merits. |
| Conclusion | ~10% | What follows now the argument is established, and what it costs. Never a restatement. |
How to start an argumentative essay
Start with the thesis, not the introduction. You cannot introduce an argument you have not worked out, and the opening written first is nearly always an opening to a slightly different essay than the one that gets written. Draft the position, draft the body, then come back.
When you do write it, the opening move that works is narrow, then commit. Open on something specific — a case, a number, a precise observation, a claim that contradicts what the reader probably assumes. Widen just far enough to show why it matters. Land on the thesis.
The openings that fail all fail the same way: they take up space without giving the reader anything they did not already have. The dictionary definition, "since the dawn of time", "in today's society", the rhetorical question nobody yet cares about, and announcing your own essay ("In this essay I will argue…") are all versions of the same problem.
A working first sentence for the example below: *"The 1938 Czech border fortifications were, by the assessment of the German General Staff itself, formidable."* That is concrete, it is surprising if you assumed Czechoslovakia was indefensible, and it sets up everything that follows.
Argumentative essay outline
A worked outline for the question *"Was the Munich Agreement a rational policy given what Chamberlain knew in 1938?"* Copy it and swap in your own claims — the shape is what transfers.
Munich was a rational response to the intelligence Chamberlain actually had, and the charge of appeasement is largely a judgement made with information that reached London only after the decision was taken.
Introduction
Hook on the German General Staff's own assessment of the Czech defences, then the thesis.
Evidence: A specific 1938 staff assessment, or a contemporary British intelligence estimate.
Body 1
British rearmament in 1938 was materially behind where it stood a year later, and the RAF knew it.
Evidence: Fighter squadron strength and radar coverage, September 1938 vs September 1939.
Body 2
The Dominions had made clear they would not support a war over Czechoslovakia, which constrained what Britain could credibly threaten.
Evidence: Dominion government communications to London, mid-1938.
Body 3
Chamberlain's intelligence on German intentions was contested inside his own government, so "he should have known" assumes a clarity that did not exist.
Evidence: Competing Foreign Office and SIS assessments of German aims.
Counterargument
The strongest objection: Munich handed Germany the Skoda works and the Czech army's equipment, materially strengthening the enemy — a cost visible at the time, not only afterwards.
Evidence: Czech armaments output figures and their subsequent use in 1940.
Conclusion
Rational given the information does not mean correct. What follows is a narrower claim about how we judge decisions under uncertainty.
Argumentative essay example
One body paragraph from the outline above, written out. Note that the claim arrives in the first sentence, the evidence is specific, and the last sentence does argumentative work rather than summarising.
Britain in September 1938 could not have fought the war it fought a year later. Fighter Command had a fraction of the Hurricane and Spitfire squadrons it would field in 1940, and the Chain Home radar network — the thing that made the later defence possible at all — covered only part of the approach to London [NEEDS SOURCE: RAF squadron strength and radar coverage, September 1938 vs September 1939]. Chamberlain was not choosing between war and peace; he was choosing between a war Britain would probably lose and a delay whose cost was unknown. That reframing matters, because the charge against him is usually that he was naive rather than that he judged the arithmetic wrong.
Mistakes that cost the most marks
The straw counterargument
Engaging the weakest version of the opposing case is the most common way a competent argumentative essay stays competent. Steelman it instead — state the objection as its most intelligent advocate would, then answer that. If you cannot answer the strong version, that is important information about your thesis.
A thesis nobody could dispute
"Social media has both positive and negative effects" is not a position; it is a refusal to take one. The test is whether an informed reader could disagree. If not, the body has nothing to prove.
Paragraphs that could be shuffled
Swap any two body paragraphs. If nothing breaks, they are a list rather than an argument. Each should need the one before it.
Hedging the claim you actually have evidence for
"It could perhaps be argued that there may be some evidence to suggest" is four layers of insulation around one claim. Hedges should mark real uncertainty and nothing else.
Frequently asked questions
How many paragraphs should an argumentative essay have?
Divide the word count by about 150 for the body, then add an introduction and a conclusion. A 1,000-word argumentative essay is usually five to seven paragraphs, one of which engages the counterargument. Let the number of argumentative steps decide it rather than forcing three body paragraphs.
Where does the counterargument go?
Usually after your own case is established, so the reader is already persuaded when they meet the objection. Putting it first can work when the opposing view is what the reader currently believes, because addressing it early removes the resistance that would otherwise block everything after.
Can I use "I" in an argumentative essay?
Check your course style. Many disciplines now accept first person for signposting your own argument ("I argue that…"), while others still require the impersonal. What is universally disliked is "I feel" or "I believe" attached to a claim that should rest on evidence.
What is the difference between an argumentative and a persuasive essay?
An argumentative essay is supposed to win on evidence and reasoning that would survive a hostile reader. A persuasive essay may also appeal legitimately to the reader’s values and interests. In practice many courses use the terms interchangeably — read the brief rather than the label.
Other essay types
- How to Write a Narrative Essay
- How to Write a Personal Essay
- How to Write an Analytical Essay
- How to Write a Reflective Essay
Essay outline templates · How long is an essay? · What is an essay?