I did find it interesting that one of the things that I would consider to be in the top five for effecting change in the last forty years was not emphasized. This is the air conditioner. My family is from Oklahoma, so obviously the change air conditioners made in the Sun Belt is rather obvious to me. However, the air conditioner also affected American education and American politics as well as the national state of mind. Washington, D.C., I believe, changed incredibly. What was in effect a Southern town has been converted to a Northern one through air conditioning.