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.