It didn't they came and stole all our jobs.
irrigation
after he introduced irrigation to the Yellow River valley.
Early farmers used irrigation systems primarily in regions with arid or semi-arid climates where rainfall was insufficient for agriculture. Notable areas include the Nile River Valley in Egypt, the Tigris and Euphrates river valleys in Mesopotamia, and the Indus River Valley in South Asia. Additionally, early irrigation practices were developed in regions like ancient China and the southwestern United States, enabling the cultivation of crops in otherwise inhospitable environments. These systems allowed for more reliable food production and supported the growth of early civilizations.
The first river valley civilization was Mesopotamia, located in Asia. Asia has had the most river valley civilizations.
Irrigation.
Danube River Valley
Irrigation.
Tigris, Euphrates River Valley's and Los Angeles
Complex irrigation systems.
yellow river valley
This is called irrigation - specifically it is "surface irrigation".
Democracy