I will give an example of how history and economics are very closely related. World War II began in 1941 and pulled the country out of the Great Depression. The need for military machinery, and soldiers created jobs. Soldiers who had to go fight left behind vacancies that needed to be filled. As a result unemployment went way down, and industry boomed. Then the war ended and all those soldiers who had been gone so long came home. When this happened it resulted in the "baby boom" which we are about to see or are starting to see is going to put a lot of stress on the social security system as these baby boomers are reaching retirement age. So you can see that one 5 year event put an end to a depression that was 12 years old and now some 60 plus years later we are once again seeing major effects from it.