The comparison must also consider the relation in these various societies between religion and morality, both social and individual. From this point of view, as we are dealing with the second millennium only, it must be a comparison mainly between the Mesopotamian and the Hellenic; for except for a few Hittite letters that reveal little, there is no evidence concerning our races of the west of Asia Minor, since monuments can scarcely be direct witnesses concerning ethics; at least, the Asia Minor monuments are not, and we must await the further discovery and interpretation of Hittite literature. For the proto-Hellenic period also, it may be said, we have no explicit and direct evidence. But we have Homer, whose poems belong to the end of that period and the beginning of the second; and we cannot suppose that the average morality that they represent had all grown up in the century before them, still less that Homer had discovered it as an original teacher. Therefore, cautiously and critically handled, his poems throw some light on the moral facts of the centuries behind them. There is also some evidence to be gleaned from the rich field of Greek mythology and cult; only we must realise that we rarely can determine the date of the rise of an old Hellenic legend or the institution of an old Hellenic cult. The Mesopotamian evidence, {142} then, is direct and explicit, depending solely on the right interpretation of documents; the Hellenic evidence concerning the earliest period is indirect and often hypothetical.