How did the economic policies, behaviors and circumstances of the 1920s lead to the Great Depression

The "roaring twenties" were a time of American prosperity. With the invention of the automobile, people were able to travel to and from in a matter of minutes. That increased jobs, which increased pay, which increased factory production. Everyone had more money, so everything was cheaper. People invested heavily into stocks. Credit cards were also a rave during this time. With farmers battling a seemingly endless drought, crops were not in abundance. People had to find other ways to feed their family. Then the banks started failing and soon the stock market crashed. People could not get their money back, so they lived in severe poorness. This was the start of the Great depression.