ABSTRACT
We come now to a most interesting and important period in the history of culture, namely, the first great cultural revolution. After about a million years of cultural development, during which time cultural systems were activated almost exclusively by energy from the human organism, a radical change took place: solar energy was harnessed in the form of plants and animals. The consequences were profound and comprehensive. Social organization was transformed from tribal society, based upon kinship, to civil society organized upon the basis of property relations. The ideological sector of culture, too, underwent change, but not as great as in the case of the sociological component.
