The rivers led to fertile soil and protection for people in the area so it was a prime place for settlement. Example; Egypt and the Nile.
Was it by any chance K-9?
An empire is a dominating nation with extensive territories and a powerful ruler, such as Rome. Hope this helped!
The main factor that led to the development of the four major river valley civilizations was its closeness to rivers, which was a food source, its flooding allowed for fertile soil, allowed easy transportation and cities near them were easier to defend.
The fact that fewer people had to dedicate to the production of food allowed some of them to develop other activities, such as the construction of building and cities, metal working, trade and social organization. This led to a social division, the ones that worked and the ones that ruled, creating intricate systems of governments and religions that ideologically sustained those in power.
Europe was divided and saw weakness being separated and saw strength in numbers and did not wish to have another war with in europe like that again
