Question: what were the four main causes of the great depression quizlet?
Answer: #1. Stock Market Crash. -Throughout the 1920s, people invested in the stock market in hopes of making money. ... 
#2. Banking Crisis. -People deposit money in banks for safe-keeping. ... 
#3. Overproduction. -Industry thrived in the 1920s because of mass production. ... 
#4. Under-consumption.