Probably the most important ideas kept alive by the Sumerian language were religious. Cities like Ur and Uruk were the seedbed of ideas which, after transmutation into other religions in the Middle East during the second and first millennia BC, were 4,000 years later to be influential worldwide, albeit in almost unrecognizably different forms. There is, for example, in the Gilgamesh Epic an ideal creature of nature, the man Enkidu; his fall from his innocence is sexual, a seduction by a harlot, and thereafter, though the outcome for him is civilization, he loses his happy association with the natural world. Literature makes it possible to observe such hints at the mythologies of other and later societies. In literature, men begin to make explicit the meanings earlier hidden in obscure relics of sacrificial offerings, clay figures and the ground plans of shrines and temples. In earliest Sumer these already reveal an organization of human discourse with the supernatural much more complex and elaborate than anything elsewhere at so early a date. Temples had been the focus of the early cities and they grew bigger and more splendid (in part, because of a tradition of building new ones on mounds enclosing their predecessors). Sacrifices were offered in them to ensure good crops. Later their cults elaborated, temples of still greater magnificence were built as far north as Assur, 300 miles away up the Tigris, and we hear of one built with cedars brought from the Lebanon and copper from Anatolia.
No other ancient society at that time gave religion quite so prominent a place or diverted so much of its collective resources to its support. It has been suggested that this was because no other ancient society left men feeling so utterly dependent on the will of the gods. Lower Mesopotamia in ancient times was a flat, monotonous landscape of mud-flats, marsh and water. There were no mountains for the gods to dwell in like men, only the empty heavens above, the remorseless summer sun, the overturning winds against which there was no protection, the irresistible power of floodwater and the blighting attacks of drought. The gods dwelt in these elemental forces, or in the ‘high places’ which alone dominated the plains, the brick-built towers and ziggurats remembered in the biblical Tower of Babel. The Sumerians, not surprisingly, saw themselves as a people created to labour for the gods.
By about 2250 BC a pantheon of gods more or less personifying the elements and natural forces had emerged in Sumer. It was to provide the backbone of Mesopotamian religion and the beginning of theology. Originally, each city had its particular god. Possibly helped by political changes in the relations of the cities, they were in the end organized into a kind of hierarchy which both reflected and affected men’s views of human society. The gods of Mesopotamia in the developed scheme are depicted in human form. To each of them was given a special activity or role; there was a god of the air, another of the water, another of the plough. Ishtar (as she was later known under her Semitic name) was the goddess of love and procreation, but also of war. At the top of the hierarchy were three great male gods, whose roles are not easy to disentangle: Anu, Enlil and Enki. Anu was father of the gods. Enlil was at first the most prominent; he was ‘Lord Air’, without whom nothing could be done. Enki, god of wisdom and of the sweet waters that literally meant life to Sumer, was a teacher and life-giver, who maintained the order Enlil had shaped.
These gods demanded propitiation and submission in elaborate ritual. In return for this and for living a good life they would grant prosperity and length of days, but not more. In the midst of the uncertainties of Mesopotamian life, some feeling that a possible access to protection existed was essential. Men depended on the gods for reassurance in a capricious universe. The gods – though no Mesopotamian could have put it in these terms – were conceptualizations of elementary attempts to control environment, to resist the sudden disasters of flood and dust-storm, to assure the continuation of the cycle of the seasons by the repetition of the great spring festival when the gods were again married and the drama of creation was re-enacted. After that, the world’s existence was assured for another year.