Sumer
Sumer was a civilization and a historical region located in southern Iraq (Mesopotamia), known as the Cradle of civilization. It lasted from the first settlement of Eridu in the Ubaid period (late 6th millennium BC) through the Uruk period (4th millennium BC) and the Dynastic periods (3rd millennium BC) until the rise of Babylon in the early 2nd millennium BC. The term “Sumerian” applies to all speakers of the Sumerian language.
Although other cities pre-date Sumer (Jericho, Çatalhöyük and others, either for seasonal protection, or as year-round trading posts) the cities of Sumer were the first to practice intensive, year-round agriculture (from ca. 5300 BC). The surplus of storable food created by this economy allowed the population to settle in one place instead of migrating after crops and grazing land. It also allowed for a much greater population density, and in turn required an extensive labor force and division of labor. This organization led to the necessity of record keeping and the development of writing (ca. 3500 BC).
