Cause of the Great Depression

The Great Depression, a period of severe economic decline lasting from 1929 to roughly 1939, was the worst economic downturn in the history of the industrialized world. Triggered by the infamous Wall Street Crash of 1929, the Depression resulted in widespread unemployment, plummeting stock prices, and bread lines forming in major cities. The economic crisis spread internationally, impacting countries around the globe. While the exact end date is debated, the Great Depression left a lasting impact on the world, leading to significant social and political changes

Based on your reading and notes, what causes the Great Depression>?