What was the time period of Sumerian villages?

Sumerian villages emerged around 4500 BCE during the Ubaid period and continued to develop through the Uruk period, which lasted until about 3100 BCE. This time marked the transition from small agricultural communities to more complex urban centers in southern Mesopotamia. By around 3000 BCE, Sumer had established itself with significant city-states, such as Ur and Uruk, laying the groundwork for one of the world's earliest civilizations.