Thesis · Explainer + Live Tool
How to write a literature review.
A literature review is a map of a scholarly conversation, not a list of summaries in the order you read them. Group sources by the argument they make — the settled ground, the live disagreement, the corner nobody has looked at — and the map itself shows you where your work stands. Sort your own reading into themes with the live ledger below before you write a word of prose.
The ledger below saves to this browser’s local storage only — nothing you add is sent anywhere or seen by us.
01 — Synthesis, Not Summary
A map, not a pile.
A summary recaps what one source said. A synthesis reorganises several sources around the questions they share, to show how the conversation actually moves1.
If a paragraph in your review begins with a surname — “Smith argues X. Then Jones argues Y.” — it is very likely a list wearing a review’s clothing. A synthesised paragraph begins with the shared question or claim, then places the sources around it: who agrees, who disagrees, and why the disagreement itself is informative.
The two common organising principles are chronological (oldest studies to newest, when the history of the debate is itself part of your point) and thematic (grouped by shared question or argument, which suits most reviews once they pass a handful of sources)1.
02 — Organise by Theme
Sort your own reading here.
Add each source with the theme it belongs to and a one-line note on what it argues. Sort and filter to see the map take shape — then write from the groups, not the pile.
| Your synthesis note | Remove |
|---|
Method: rows live only in this browser’s local storage — nothing is sent to a server. Reloading or returning later keeps your ledger; clearing your browser data clears it too.
03 — Writing From the Map
Each theme becomes a paragraph.
Once sources are grouped, a theme-group turns into a paragraph the same way any paragraph works: one focus, developed with evidence and your own reasoning about what it means2.
The generic labels below stand in for your own sources — the point is the shape of the sentence, not the specific claim.
Specimen — summary (weak)Source A found that remote work increased in 2020. Source B found that productivity varied. Source C surveyed 500 employees and found mixed results.
Specimen — synthesis (stronger)Source A and Source B agree remote work rose sharply, but disagree about why it stuck — Source A points to employer cost savings, Source B to employee preference. Source C’s mixed results suggest both are partly right depending on role type, which is the gap this review stands in.
04 — Failure Modes
What markers actually flag.
- The surname list. Paragraph after paragraph starting “X says… Y says…” with no shared question tying them together.
- Chronology mistaken for argument. A timeline of who published when is not, by itself, a case for anything — it needs a claim about what changed and why.
- Cherry-picked agreement. Including only sources that support your position misrepresents the field and is usually visible to anyone who knows the literature. Represent real disagreement honestly, then say where you stand and why.
- An asserted gap. “No one has studied this” without showing the map that makes the gap visible reads as a claim you haven’t earned. Show the groups first; let the gap appear between them.
05 — FAQ
Real questions, short answers.
What's the difference between a literature review and an annotated bibliography?
An annotated bibliography summarises sources one at a time, source by source. A literature review synthesises them into a map of the conversation, organised by theme or chronology rather than by which source came first in your reading list.
Chronological or thematic — which should I use?
Thematic suits most reviews with more than a handful of sources, because it groups the conversation by argument rather than by publication date. Chronological works well when the history of the debate — how thinking changed over time — is itself part of your point.
How many sources does a literature review need?
Enough to credibly map the conversation, not a fixed number. A short essay's review might synthesise half a dozen; a doctoral chapter might synthesise hundreds. Depth of synthesis matters more than the count.
Does the ledger on this page save my sources anywhere but my own browser?
No. Rows are stored only in this browser's local storage. Nothing is sent to a server, nothing is shared, and clearing your browser data clears the ledger.
Can I export what I've organised?
Yes — the Download as CSV button exports the rows currently visible (after any search or theme filter) as a spreadsheet file you can take into your own reference manager or draft.
Where does the "gap" in a literature review actually come from?
From the map itself, not from asserting one exists. Once sources are grouped by theme, a genuine gap is visible as a question no group fully answers, or two groups that disagree without either resolving it — that visible space is what your work stands in.
06 — Sources
Where this page’s guidance comes from
- Purdue Online Writing Lab (Purdue OWL), “Synthesizing Sources,” Purdue University.owl.purdue.edu · accessed 25 Jul 2026
- Purdue Online Writing Lab (Purdue OWL), “Paragraphs and Paragraphing” (unity and coherence, applied here to theme-grouped paragraphs), Purdue University.owl.purdue.edu · accessed 25 Jul 2026
About this page: the synthesis/summary distinction and the chronological/thematic organising principles follow the sources above. The ledger tool is original to this page and performs no analysis of what you enter — it only stores, sorts and filters what you type.
The Concierge
Not sure your themes hold together?
Describe your groups to the concierge and it can ask the questions a supervisor would — whether a theme is really one idea, and where the gap between them actually sits.