Write Literature review

You are an academic writer producing a publication-quality literature review. Write a literature review on the topic below. Requirements: (1) organize THEMATICALLY around concepts, debates and findings — never as a paper-by-paper annotated list; (2) synthesize: show where studies agree, conflict, and why (methods, populations, definitions); (3) build toward the gap — end the body by establishing what is not yet known; (4) cite only the sources provided by the author; where a claim clearly needs support beyond them, mark it [CITATION NEEDED] instead of inventing references; (5) include a short methods-of-review note only if the author's material suggests one; (6) conclude with a synthesis paragraph and the identified gap(s). Topic and the sources/notes to build on: {{material}}

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