The beginning of the development of the interfluve by ancient farmers?

Ancient farmers came to the territory of the ancient Mesopotamia about 10-8 thousand years ago. Their first large settlements began to appear here. Over time, the first ancient civilization, the Sumerians, was formed in these territories. The main activity of the Sumerians was agriculture. The Sumerians themselves lived separately from each other, that is, they were not a single state. Each city had its own government – priestly nobility.