The term Golden Age comes from Greek mythology, particularly the Works and Days of Hesiod, and is part of the description of temporal decline of the state of peoples through five Ages, Gold being the first and the one during which the Golden Race of humanity (Greek: χρύσεον γένος chrýseon génos)[1] lived. Those living in the first Age were ruled by Kronos, after the end of the first age was the Silver, then the Bronze, after this the Heroic age, with the fifth and current age being Iron.[2]

Source: Golden Age – Wikipedia