When faced with important undertakings, these groups would come together into a small number of tribes, entirely independent in terms of religious, political, and militaristic views, but which all recognized a supreme king, their chief.
Glotz also distinguished between two phases of the ancient Greek city: an archaic era (1500-1400 BCE), corresponding to the Minoan age, with the formation in Greece of the first urban centers, and a Doric age, roughly viewed as a Hellenic middle age, characterized by chaos and invasions.