Asia
The coastal periphery was home to some of the world's earliest known civilizations, each of them developing around fertile river valleys. The civilizations in Mesopotamia, the Indus Valley and the Yellow River shared many similarities. These civilizations may well have exchanged technologies and ideas such as mathematics and the wheel. Other innovations, such as writing, seem to have been developed individually in each area. Cities, states and empires developed in these lowlands.
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.