ABSTRACT
Many archeologists today believe that humans of one type or another have been present on Earth for more than 4 million years. We know very little about our most distant ancestors, but in recent times a substantial body of knowledge has been developed about the evolution of human civilization since the last ice ages. We know that is only in the past 11,000 years that we have made the change from hunter-gatherers to farmers [1], become relatively sedentary, and begun to develop the type of agriculturally based society that evolved much later into the ancient city state of Sumer, the later society of Dynastic Egypt, and eventually into the large nation-states of the present.
