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.
Ancient history
Chinese Civilization that emerged within the Yellow River Valley is one of five original civilizations in the world. Prior to the formation of civilization neolithic cultures such as the Longshan and Yangshao dating to 5,000 BC lived in wall cities and likely had social organizations of complex chiefdoms. The practice of rice cultivation was vital to settled life in China.