We find many of the early civilizations began along major river systems. For example Egyptians settled along the Nile River, Harappa culture along the Indus, Chinese Empire along the Huang River and the Mesopotamian Countries along the Tigris and Euphrates rivers. The river systems provided these early civilizations with a consistent source of silt from the yearly floods and water for the crops. The silt is like a natural fertilizer, bringing new minerals to enrich the crop depleted soil.
