Other things were changing, too. The villagers must have had to agree on new rules for living together. The head man of the village had problems different from those of the chief of the small food-collectors’ band. If somebody’s flock of sheep spoiled a wheat field, the owner wanted payment for the grain he lost. The chief of the hunters was never bothered with such questions. Even the gods had changed. The spirits and the magic that had been used by hunters weren’t of any use to the villagers. They needed gods who would watch over the fields and the flocks, and they eventually began to erect buildings where their gods might dwell, and where the men who knew most about the gods might live. WAS FOOD-PRODUCTION A “REVOLUTION”? If you can see the difference between these two pictures--between life in the food-collecting stage and life after food-production had begun--you’ll see why Professor Childe speaks of a revolution. By revolution, he doesn’t mean that it happened over night or that it happened only once. We don’t know exactly how long it took. Some people think that all these changes may have occurred in less than 500 years, but I doubt that. The incipient era was probably an affair of some duration. Once the level of the village-farming community had been established, however, things did begin to move very fast. By six thousand years ago, the descendants of the first villagers had developed irrigation and plow agriculture in the relatively rainless Mesopotamian alluvium and were living in towns with temples. Relative to the half million years of food-gathering which lay behind, this had been achieved with truly revolutionary suddenness. GAPS IN OUR KNOWLEDGE OF THE NEAR EAST If you’ll look again at the chart (p. 111) you’ll see that I have very few sites and assemblages to name in the incipient era of cultivation and domestication, and not many in the earlier part of the primary village-farming level either. Thanks in no small part to the intelligent co-operation given foreign excavators by the Iraq Directorate General of Antiquities, our understanding of the sequence in Iraq is growing more complete. I shall use Iraq as my main yard-stick here. But I am far from being able to show you a series of Sears Roebuck catalogues, even century by century, for any part of the nuclear area. There is still a great deal of earth to move, and a great mass of material to recover and interpret before we even begin to understand “how” and “why.”