early Neolithic world.
The fear of uncleanness and pollution, and the methods of cleansing that were advisable, constituted another source of power for the knowledgeable men and women. For there have always been witches as well as wizards, and priestesses as well as priests. The early priest was really not so much a religious man as a man of applied science. His science was generally empirical and often bad; he kept it secret from the generality of men very jealously; but that does not alter the fact that his primary function was knowledge and that his primary use was a practical use.
Twelve or fifteen thousand years ago, in all the warm and fairly well-watered parts of the Old World these Neolithic human communities, with their class and tradition of priests and priestesses and their cultivated fields and their development of villages and little walled cities, were spreading. Age by age a drift and exchange of ideas went on between these communities. Eliot Smith and Rivers have used the term