<human>:  What caused the Great Depression of the 1930s?
<bot>: The Great Depression of the 1930s was caused by a combination of factors, including an uneven distribution of wealth, a decrease in purchasing across the globe, and an inadequate response from world governments. A stock market crash in October 1929, known as Black Tuesday, is often cited as an initial cause of the depression, as it marked the beginning of a period of economic downturn that lasted for a decade.