Question by R#ymunDo: What were some of the main causes for the american great depression. “History”? can u explain in cause and effect? Best answer: Answer by Gary DVery similar to our current situations more people were playing the stock market and the values got very inflated. This was driven by a newly expanding industry of the rail roads. To spare you the long exasperated details the stocks fell sharply and people did a “run on the banks” to take their money out. The banks as policy only had a percentage of the deposits on hand and people freaked out and banks ran out of money quickly. this started the whole process. There are a lot more details but this starts it out. delve into it cause their are tons of circumstances that went into this. Read more... ...