IB History SL Extended Essay Example

The research question is clear, historically specific, and suitably arguable. By asking “to what extent,” the student sets up a genuine causal investigation rather than a narrative account, which is exactly the kind of focus that supports sustained historical analysis.

What evidence shows that the Depression changed decision-making in 1931 rather than simply intensifying pre-existing expansionist ambitions? A more explicit distinction between catalyst and underlying cause would strengthen the line of inquiry.

The opening gives the investigation immediate context and shows the student understands why the topic matters. Linking the Mukden Incident to broader shifts in Japanese foreign policy helps frame the essay as an inquiry into causation rather than isolated events.

Consider stating a clearer selection principle for the secondary historians: for example, why these authors were chosen, and how each one directly helps test the relative importance of economic, military, and ideological causes. That would make the method feel more deliberately designed.

The method is relevant, but it remains more descriptive than operational. The student names broad approaches, yet does not clearly explain how evidence will be weighed against each other in practice. A stronger methodology would define how economic data, propaganda, and historiography are being compared to answer the question.

This is a promising source type, but the bibliography does not clearly show these cabinet memoirs. The student should ensure every source mentioned in the methodology is traceable in the references, otherwise the method appears less fully implemented than claimed.

The student uses specific economic evidence well here. Referring to silk exports, tariffs, and consumer demand gives concrete support to the claim that the Depression disrupted Japan’s economy rather than relying on general statements about hardship.

This sentence is incomplete, which interrupts the historical argument and weakens the credibility of the evidence. The student should revise this section so the claim is fully stated and clearly connected to the source being used.

The evidence is well chosen because it connects macroeconomic collapse to social consequences in rural Japan. That helps the student show not just that the economy weakened, but why that weakening could plausibly affect political support for expansion.

The student could strengthen this point by naming at least one newspaper or issue date. Specific publication evidence would make the propaganda argument much more persuasive and easier to verify.

The student does a good job linking source content to the historical argument. Rather than merely describing the broadcast, the analysis explains how it reflects the relationship between economic decline, propaganda, and military justification.

This claim needs tighter explanation. The student should distinguish the economic effect of the Depression from the separate impact of Chinese railway competition, so the reader can see exactly how much each factor mattered to the South Manchurian Railway.

How directly does this evidence show a causal link between zaibatsu interests and the invasion decision itself? The student should consider whether commercial opportunity influenced policy, or whether it mainly followed military decisions already underway.

This is a strong thematic claim, but it is presented too broadly. The student should be more precise about which groups became convinced, how this shift is evidenced, and why this change mattered more than older ideological currents that already existed before 1929.

The student connects a specific event to a broader political shift, which shows good historical understanding. Using the Hamaguchi assassination as evidence helps illustrate how economic stress could translate into instability and anti-liberal sentiment.

This is too definitive for the evidence shown here. The student should qualify the claim and acknowledge that militarism also had independent roots. As written, the sentence overstates what can be proven from the sources cited.

This is a good example of using a source to challenge a simplified narrative. The student does not just quote the Lytton Report; they use it to test the claim that Chinese hostility was the main driver and to connect evidence back to the research question.

Consider adding one sentence of explicit synthesis here that weighs ideology against economics. A short comparative judgement would help show why this conclusion follows from the evidence rather than simply restating the preceding section.

The evaluation here is relevant, but it stays generic. The student should explain more specifically how the source’s Cold War context affects interpretation, and whether that limitation changes how much weight the argument should carry in the essay.

The student identifies the key actors and explains how institutional autonomy mattered. This is effective because it moves beyond vague references to “the military” and shows how specific officers and organisational culture drove events.

This paragraph contains several important claims, but they are layered so densely that the causal chain becomes hard to follow. The student should separate the security argument from the economic argument more clearly so the reader can see exactly how each factor contributed to the invasion.

Does this evidence show a pretext, a genuine security concern, or a mixture of both? The student could improve the analysis by considering whether strategic fears and economic motives reinforced each other rather than forcing a strict either/or interpretation.

This is a coherent analytical judgement that connects evidence from the earlier sections into a clear causal claim. The student is doing more than narrating events here; they are synthesizing multiple strands into a reasoned argument.

The conclusion is plausible, but it is asserted rather than demonstrated here. The student should show more clearly why this cause outweighs military autonomy and imperial planning, rather than simply naming the Depression as the decisive catalyst.

The student attempts a counterfactual argument, which is a strong sign of higher-level historical thinking. This kind of reasoning can be powerful when it is carefully supported, because it tests the relative importance of different causal factors.

The evaluation is thoughtful, but it needs to be tied more directly to the essay’s argument. The student should explain how this limitation affects the reliability or usefulness of the report for judging the Depression’s causal role in 1931.

Consider unpacking this source more explicitly: what exactly does Salisbury observe, and how does that observation support or complicate the argument about Depression-era militarism? A little more source integration would sharpen the analysis.

This is a strong synthesis sentence because it brings together the essay’s main causal threads. The student shows that they can connect military autonomy, ideology, and economic crisis into a unified argument rather than treating them as separate topics.

This claim is too sweeping and needs nuance. The student should distinguish between Japanese perceptions of exclusion and the institutional limits of the League, because collapsing those into one statement makes the argument less precise.

The conclusion usefully reflects on the range of evidence used, which shows awareness of method as well as content. That self-awareness helps demonstrate that the investigation is based on comparative analysis rather than a single-source narrative.

The word “inevitable” is too absolute for historical causation. The student should avoid deterministic language unless the evidence can genuinely rule out alternatives, and instead frame the conclusion as the strongest or most immediate cause.

The conclusion would be stronger if it briefly ranked the competing causes. A short final comparison of economics versus military autonomy and ideology would make the judgement more convincing and easier to follow.

The student is right at the limit of the word count, which leaves very little room for refinement or clarification. Trimming some repetition and tightening a few sections would make the argument more efficient and reduce the risk of losing marks through overextension.

The title is clear and directly aligned with the research question. It accurately signals the historical topic and helps frame the essay as an investigation into causation.

Consider shortening some of the longer section headings. Tighter titles would improve readability and make the document feel more concise, especially because the headings already communicate the main idea without needing so much detail.

The section headings reflect the essay’s causal framework, which helps the reader understand the progression of the argument. Clear signposting like this supports presentation because it makes the comparison of causes more transparent.

The structure is clear and appropriate: the report signposts its introduction, methodology, analysis sections, conclusion, and bibliography. This makes the line of argument easy to navigate and shows that the student has planned the investigation as a complete historical essay.

Including a bibliography as a distinct final section is good presentation practice. It helps separate evidence from argument and shows that the investigation follows the conventions expected in a formal research report.

The bibliography contains a mixture of academic books and website entries, which is acceptable, but the student could improve presentation by making citation style more consistent across all entries. Consistency in punctuation, italics, and access details would make the reference list look more polished.

Some bibliography entries rely on general online summaries rather than clearly specialized historical research. The student should prioritise stronger academic or primary-source material where possible, especially for the most important causal claims.