The most important cause of the Great Depression: Speculator's actions

The actions of the speculators in the 1920's ultimately were the leading cause of the Great Depression because of their over-confidence in the raising of stock prices. In the 1920's, lots of Americans "got rich quick" by investing and selling in the stock market, but when speculators borrowed money from the bank and the stock prices went down in a company, those speculators were in even more debt with the bank. So when a lot of people started to do this, banks ran dry and went bankrupt. In the 1920's over 500 banks had failed and what happens when a bank fails, is that everyone loses their money and the poverty rates plunge. It's probably the most important because of how many Americans were involved with debt from the stock market and how many banks failed. 

Automobile Industry

I agree that without the automobile industry, prosperity would of been hard to reach because so many aspects of the economic boom came from cars such as: building roads, creating jobs not only in the automobile industry, but in the rubber, glass and steel industries as well. When roads were built, transportation was much faster and easier, which was a catalyst into the modern era. From automobiles, there came the idea of quicker transportation, and so the airplane was invented. Motels and fast food drive thru windows were popping up everywhere because of the popularity and efficiency of the automobile. 

Question 3:1920's Economic Boom

The Economic Boom of the 1920's was a time of building and putting the improvements and reforms into action. Road building, Bridge building, and Structure building all contributed to better housing, transportation and easier travel. New technology made older tedious jobs very simple and easy to do, such as refrigerating and talking on the telephone. One of the most important inventions of this time was automobiles and airplanes, which made transportation easier and a lot more quicker.