Guides
How to Write a Literature Review That Argues Something
By Dr Ayesha Khan · · 4 min read
Quick answer
A literature review synthesises research thematically to build an argument, ending with the gap your study addresses. Organise by theme or debate rather than by source, compare and evaluate studies rather than describing them one by one, and make every section point towards your research question.
Synthesis, not summary
The commonest failure is the 'annotated bibliography' structure: Smith found this, then Jones found that, then Patel found something else. Each paragraph summarises one study and the reader learns nothing about the field.
A real review is organised around ideas. Each section takes a theme or a disagreement and brings several studies to bear on it — comparing, contrasting and evaluating. Sources become evidence in your argument rather than the subject of it.
Organise by theme or debate
Group your reading into the three or four questions the field is actually arguing about. Within each, set out the positions, the evidence for them, and where the weaknesses lie.
Chronological organisation works only when your point is genuinely about how thinking developed over time. Otherwise it usually disguises a lack of analysis.
Evaluate the evidence
Do not treat published research as automatically authoritative. Comment on sample sizes, methods, contexts, and whether findings have been replicated. A study of 30 undergraduates in one country does not settle a general question.
This evaluation is what distinguishes a first-class review. It also sets up your methodology, because your choices should respond to weaknesses you have identified.
Build towards the gap
The review's job is to make your research question feel inevitable. By the end, the reader should already suspect what is missing — and your gap should be the obvious next step, not a surprise.
State it explicitly at the end: given all of the above, this specific question remains unanswered, and here is why it matters.
Search systematically and record as you go
Use your library databases rather than a general search engine, keep a record of the terms and filters you used, and follow citation trails both backwards and forwards from key papers.
Record full references immediately. Reconstructing sources at the end is where citations get lost and accidental plagiarism happens.
Know when to stop reading
You will never read everything, and the attempt is a common way to stall for months. A reasonable stopping point is when new papers keep citing the same foundational work and stop changing your picture of the field.
At that point, start writing. Writing reveals gaps in your understanding far faster than more reading does.
Frequently asked questions
How many sources does a literature review need?+
It depends on the level and the field — an undergraduate review might use 20 to 40, a doctoral one many more. Depth of engagement matters far more than the count.
Should I include studies that contradict my argument?+
Yes, and engaging with them properly strengthens your review. Ignoring inconvenient evidence is the fastest way to look unreliable to an examiner who knows the field.
How recent do sources need to be?+
Recent enough to reflect the current state of the field, but foundational older work should be included where it is still cited. In fast-moving areas, examiners will expect the last few years to be well covered.
What's the difference between a literature review and an essay?+
An essay argues a position on a question; a literature review maps and evaluates what is known, identifies disagreements, and establishes the gap your research addresses.
Can I write the literature review first?+
You will draft it early, but expect to revise it after your research, because your findings change which parts of the literature matter most. Treat the first version as provisional.
Try your first session free
Meet your tutor, set your goals, and see the difference one-to-one attention makes. No card required, no commitment.