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The causes of the Great Depression are a matter of active debate among economists, and are part of the larger debate about economic crises, although the popular belief is that the Great Depression was caused by the crash of the stock market.
Historians agree that there is no one cause. or even a major cause, of the Great Depression. There are several causes that do appear near the top on any one's list of causes for the Depression. 1. No regulation of the Stock Market and the practice of buying stocks on margin.