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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.
Irving Fisher argued that the predominant factor leading to the Great Depression was a vicious circle of deflation and growing over-indebtedness. 1  He outlined nine factors interacting with one another under conditions of debt and deflation to create the mechanics of boom to bust. The chain of events proceeded as follows: