A. L. Kroeber,
Anthropology
(1923)
“ Every clear-minded historian, anthropologist, and sociologist admits that we are still in ignorance on the problems of what caused the great bursts of higher organization and original productiveness of early Egypt and Sumer, of Crete, of ancient North China, of the Mayas, of Periclean Athens. We know many of the events of civilization, know them in their place and order. We can infer from these something of the processes of imitation, conservatism, rationalization that have shaped them. We know as yet as good as nothing of the first or productive causes of civilization. ”
