Modern society has become such that an individual's success is gauged by his yearly income. One no longer feels satisfaction with helping others, curing diseases or being self-sufficient, but rather when the yearly income reaches $50,000. It has been a long-held belief that, as the cliche goe...

Jean and Gerhard Lenski, in their theory of sociocultural evolution, describe five different types of societies, separated by their technologies. They are the hunting and gathering societies, the horticultural and pastoral societies, the agrarian societies, the industrial societies, and the post-ind...