Sumer
Sumer () is the earliest known civilization in the historical region of southern Mesopotamia, modern-day southern Iraq, during the Chalcolithic and Early Bronze ages, and one of the first civilizations in the world along with Ancient Egypt and the Indus Valley. Living along the valleys of the Tigris and Euphrates, Sumerian farmers were able to grow an abundance of grain and other crops, the surplus of which enabled them to settle in one place. Prehistoric proto-writing dates back before 3000 BC. The earliest texts, from c. 3300 BC, come from the cities of Uruk and Jemdet Nasr; early cuneiform script emerged around 3000 BC.
History of Western civilization before AD 500
The earliest civilizations which influenced the development of the West were those of Mesopotamia, the area of the Tigris–Euphrates river system, largely corresponding to modern-day Iraq, northeastern Syria, southeastern Turkey and southwestern Iran: the cradle of civilization. An agricultural revolution began here around 10,000 years ago with the domestication of animals like sheep and goats and the appearance of new wheat hybrids, notably bread wheat, at the completion of the last Ice Age, which allowed for a transition from nomadism to village settlements and then cities like Jericho.