The past is a nice place to visit from time to time -- but it's a crummy place to live. Sometimes, we see a television show or visit a museum exhibit showing life a couple hundred years ago. Perhaps, you've thought, "Those were the good old days! I wish we could go back and live like that." I don't think you really do. A couple hundred years ago the life expectancy was 38 years, the average work week was 72 hours, and the median annual income was $300. Cholera, typhoid and yellow fever were common. For instance, one out of five people in Philadelphia in 1793 died from these diseases. Many women died in childbirth, and the flu also claimed the lives of many. Almost every home experienced the sorrow of losing a child. No internet, indoor plumbing, refrigerators, or microwaves. No soft mattresses, electric heat, lights, cars, television, recorded music, Tupperware, air conditioning, soft drinks, milkshakes or cheeseburgers. Everybody milked their own ...