Causes Of The Great Depression Many like to blame the stock market crash of October 19, 1929, as one of the main causes of the Great Depression. It wasn't. It was just the triggering event. The real causes of the Great Depression were the irresponsible banking practices of the roaring 20's. Discover how to survive the next Great Depression here at the Great Depression Online Greatdepressiononline.com~Site InfoWhoisTrace RouteRBL Check