The astonishing cluster of them [geniuses] that appeared in Athens during the fifth and fourth centuries B. C. ...what changed was the culture, which… - Peter Farb

A culture that is in the process of being swamped by another often reacts by physically grappling with the outsiders. But it may wage a cultural war as well. Such defensive actions have been given various labels by anthropologists: nativism, revivalism, revitalization, and messianism. All are deliberate efforts to erect a better culture out of the defeat or decay of an older one. ...The reactions of primitive peoples overpowered by Eurasian colonial empires have usually been much more extreme. Their lands appropriated, their social system ripped apart, their customs suppressed, and their holy places profaned—they tried to resist physically but they were inevitably defeated by the superior firepower and technology of the Whites. As hopelessness and apathy settled over these people, the ground was prepared for revivalistic and messianic movements that promised the return of the good old days.

At various stages of evolution, the Indian cultures were presented with only a limited number of possibilities. The members of certain kinds of societies—the small band, the large band, the tribe, the chiefdom, the state, and variations of these—tended to make characteristic choices concerning religion, law, government, and art... Such choices were not... consciously made... For a particular society, they either worked or they did not work.

All routinized religions today (including the Native American Church, Islam, Judaism, and Christianity) are successful descendents of what originated as messianic movements—that is, the vision of a new way of life for a culture under extreme stress.