From the days when the Aryan hordes first broke in upon the ancient civilizations, it was inevitable that the old gods of the temples and priesthoods should suffer great adaptations or disappear. In the course of hundreds of generations the agricultural peoples of the brunette civilizations had shaped their lives and thoughts to the temple-centred life. Observances and the fear of disturbed routines, sacrifices and mysteries, dominated their minds. Their gods seem monstrous and illogical to our modern minds because we belong to an Aryanized world, but to these older peoples these deities had the immediate conviction and vividness of things seen in an intense dream. The conquest of one city state by another in Sumeria or early Egypt meant a change or a renaming of gods or goddesses, but left the shape and spirit of the worship intact. There was no change in its general character. The figures in the dream changed, but the dream went on and it was the same sort of dream. And the early Semitic conquerors were sufficiently akin in spirit to the Sumerians to take over the religion of the Mesopotamian civilization they subjugated without any profound alteration. Egypt was never indeed subjugated to the extent of a religious revolution. Under the Ptolemies and under the Cæsars, her temples and altars and priesthoods remained essentially Egyptian. So long as conquests went on between people of similar social and religious habits it was possible to get over the clash between the god of this temple and region and the god of that by a process of grouping or assimilation. If the two gods were alike in character they were identified. It was really the same god under another name, said the priests and the people. This fusion of gods is called theocrasia; and the age of the great conquests of the thousand years B.C. was an age of theocrasia. Over wide areas the local gods were displaced by, or rather they were swallowed up in, a general god. So that when at last Hebrew prophets in Babylon proclaimed one God of Righteousness in all the earth men’s minds were fully prepared for that idea. But often the gods were too dissimilar for such an assimilation, and then they were grouped together in some plausible relationship. A female god - and the Ægean world before the coming of the Greek was much addicted to Mother Gods—would be married to a male god, and an animal god or a star god would be humanized and the animal or astronomical aspect, the serpent or the sun or the star, made into an ornament or a symbol. Or the god of a defeated people would become a malignant antagonist to the brighter gods. The history of theology is full of such adaptations, compromises and rationalizations of once local gods.