This is one of the most important books written in the last 50 years. Most people do not realize the consequences of using birth control. The consequences are severe and permanent. Wattenburg is a demographer---he studies census information in order to predict future problems and needs. From the census information for Russia, he predicted the fall of the Soviet Union. If you think it doesn't make any difference how many children you have you need to give careful consideration to the contents of this book.