- The transition from Paleolithic hunter-gatherer societies to Neolithic agricultural communities began around 8500 BC in the Fertile Crescent region near the Tigris and Euphrates Rivers.
- Early Neolithic sites included Jericho, with walls dated to around 7000 BC, and Catalhoyuk, Ain Ghazal, and Gobekli Tepe, which exhibited innovations like pottery, weaving, and organized agriculture.
- Surplus food production led to population growth and more complex, stratified societies with specialized elites, cities, and states like ancient Sumeria with its cities of Uruk and Ur.