Complex irrigation systems.
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
Are you retarded? You'd better thank the river valley civilizations for everything you have. You're an ignorant moron.
Physical geography and fear of the unknown.
Greece was not centered around a river valley.
The geographic factor that was most important to the development of the early river valley civilizations would be the river. This is because it gave them fertile soil to grow crops.