The Hopewell fused elements of the Adena, the Archaic, and other Woodland patterns of life. Thus, it cannot technically be identified as a culture. ...Rather, the Hopewell people were an amalgam of many societies whose customs varied greatly, but who were bound together by... a cult of the dead and a trade bond... a network of trade linked widely separated areas of the continent.

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.

Numerous sophisticated inventions undoubtedly originated in the New World. They include many aspects of plant domestication and horticulture, the hammock, the tobacco pipe, an intricate system used for ventilating and cooling ceremonial chambers, the enema, the hollow rubber ball, the toboggan, and numerous other objects and ideas that were brought back to the Old World after Columbus.

Social scientists of the past spoke glibly of an "agricultural revolution," a time during which human populations suddenly soared, cities were founded, and many trappings of civilization made their appearance. ...The food-production revolution turns out to be a slow evolution, a long period of experimentation rather than a sudden explosion.

For a tribe to endure, it must find some way to achieve internal unity—and that way usually is external strife. The tribe exists at all times in a state of mobilization for war against its neighbors. The slightest incident, or often merely a desire to increase prestige, is enough to set off a skirmish, and in such circumstances hatred against external enemies must be unremitting.

The seventeenth-century Iroquois... practiced a dream psychotherapy that was remarkably similar to Freud's discoveries two hundred years later. The Iroquois recognized the existence of an unconscious, the force of unconscious desires, the way in which the conscious mind attempts to repress unpleasant thoughts, the emergence of unpleasant thoughts in dreams, and the mental and physical (psychosomatic) illnesses that may be caused by the frustration of unconscious desires. The Iroquois knew that their dreams did not deal in facts but rather in symbols. ...And one of the techniques employed by the Iroquois seers to uncover the latent meanings behind a dream was free association...

We are in the habit of thinking in terms of great leaders largely because the leaders themselves want it that way. The pharaohs ordered that a record of their accomplishments be carved on stone; medieval nobles subsidized troubadours to sing their praises; today's world leaders have large staffs of public-relations consultants. No culture can be explained in terms of one or more leaders...

The debate as to where "magic" ends and "religion" begins is an old one, and it appeared to have been settled some decades ago when scholars concluded that no discernible boundary was to be found. As a result, the two were often lumped together in the adjective "magico-religious"...

Balanced reciprocity is as much a social compact as it is an economic advantage. It is particularly important in hunting-gathering societies, where no individual could possibly accumulate a surplus, live independently of other members of the band, or become so successful in the quest for food as never to need meat from someone else's kill.