History does not merely unfold within the terrain mapped out by these institutions. It does not resolve itself into the evolution of contents, of men and situations, etc., while the principles of society remain eternally valid. ... On the contrary, history is precisely the history of these institutions, of the changes they undergo as institutions which bring men together in societies. Such institutions start by controlling economic relations between men and go on to permeate all human relations (and hence also man's relations with himself and with nature).