Culture, its creativity, its process, is akin to the era of great demographic fractionation (six and one-half centuries), corresponding to each ethnic group in the geographic area in which it is developed.
Thus, for example, in Europe:
Ionia, from 1100 B.C. to 450 B.C.
Greece, from 1000 B.C. to 350 B.C.
Italy, from 920 B.C. to 270 B.C.
Iberian Peninsula, from 880 B.C. to 230 B.C.
Gaul, from 770 B.C. to 120 B.C.
British Isles, 700 B.C. to 50 B.C.
Germany, from 550 B.C. to 100 B.C.
The imperial eras of great unification were: