Essay structure: how to build an argument

Start with an arguable thesis

A thesis is a sentence a reasonable person could disagree with. If nobody could dispute it, it is a topic, not a thesis.

'This essay will discuss the effects of social media on politics' is a topic. 'Algorithmic curation, rather than user choice, is the primary driver of political polarisation on social platforms' is a thesis — it makes a claim, prioritises a cause, and tells the reader what the essay must now prove.

Decode the task verb first

Task verbs are instructions, and answering the wrong one caps your mark regardless of quality.

• Describe — set out the features. Rarely the whole task at university level.
• Explain — give reasons and mechanisms.
• Analyse — break into components and examine how they relate.
• Evaluate / Assess — weigh evidence on both sides and reach a judgement. The judgement is the point.
• Discuss — examine multiple perspectives, then take a position.
• Compare and contrast — organise by criterion, not by subject, or you write two essays glued together.
• To what extent — the answer is a degree, never a simple yes or no.

The paragraph as a unit of argument

Every body paragraph does four things: a topic sentence stating its claim, evidence supporting it, analysis explaining why the evidence supports the claim, and a link forward.

Test your structure by reading only your topic sentences in order. If they read as a coherent argument on their own, the essay works. If they read as a list of subjects, it does not.

How long is an essay?

Undergraduate coursework is typically 1,500–3,000 words; advanced and postgraduate modules 3,000–5,000. Most institutions allow ±10% and penalise beyond it, and some simply stop reading at the limit.

For a 2,000-word essay, budget roughly 200 words of introduction, 1,600 across five or six body paragraphs, and 200 of conclusion.

Introductions and conclusions do different jobs

An introduction narrows from context to thesis and signposts the structure. It should be written or rewritten last, once you know what the essay actually argues.

A conclusion answers the question, states what the argument establishes, and indicates why it matters. It never introduces new evidence, and it is not a restatement of the introduction in different words.

Counter-argument is what separates the bands

Middle-band essays present one side. Upper-band essays present the strongest version of the opposing case and explain why it does not hold.

Steelman it — take the best counter-argument seriously. Dismissing a weak version of the other side reads as evasion and markers recognise it instantly.