In the Greek mythology four—the Golden, self-sufficient; the Silver, self-indulgent; the Brazen, warlike; and the Iron, violent; together with the Heroic, nobly aspirant, between the third and fourth. In archeology, three—the Stone Age, the Bronze, and the Iron. In history, the Middle and Dark, between the Ancient and the Modern. In Fichte, five—of Instinct, of Law, of Rebellion, of Rationality, of Conformity to Reason. In Shakespeare, seven—Infancy, Childhood, Boyhood, Adolescence, Manhood, Age, Old Age.