Balanced reciprocity is as much a social compact as it is an economic advantage. It is particularly important in hunting-gathering societies, where n… - Peter Farb

At the time of the Europeans discovery of North America, the American Indians already cultivated a wider variety of plants than did the Europeans.

Invariably the prophet emerges from his hallucinatory vision bearing a message from the supernatural that makes certain promises: the return of the bison herds, a happy hunting ground, or peace on earth and good will to men. Whatever the specific promises, the prophet offers a new power, a revitalization of the whole society.

What makes the Hohokam noteworthy is the development of irrigation works. The earliest... dates from some 2,000 years ago. ...They built dams that redirected the flow of water into irrigation canals, some of them... extending for more than twenty-five miles. ...They built flat-topped pyramids and ball courts, where they used rubber balls imported from Central America. The Hohokam may also have been the first to use the technique of etching with acid in their remarkable designs on marine shells.