Complex irrigation systems.
The valley is nature / natural and therefore cannot 'accomplish' anything.
The Nile River was the axis of two early African civilizations
how did the Indus River valley contribute to the development of early cilivization
Vast Empires
Complex irrigation systems.
It was a river valley.
They had to sale the slaves from africa in order to get more gold and more food in order to survive
society
dependent on fertile land
Physical geography and fear of the unknown.
Are you retarded? You'd better thank the river valley civilizations for everything you have. You're an ignorant moron.
Greece was not centered around a river valley.
The three early river civilizations are the Incas. Aztecs and Mayas