Manuel CalderonWorld HistoryExpository EssayEarly River Valley CivilizationsIt is a well known fact that some of the earliest civilizations sprouted up around rivers about four thousand years ago. Why is that? Of all places, why a river? Well there are about threereasons why that might be the case. These are the agricultural and economic benefits, the religious importance, and the hygienic importance. First of all, these rivers provided a significant agricultural and economic advantage. For instance, the soil in the land surround these rivers was very fertile. In the circumstance of Egypt, the Nile flooded annually which provided even more water for crops. From this ability to cultivate their own crops, and in such abundance, the people living in these river valley civilizations would often have a surplus of food that they could trade and sell with people of other surrounding nations. This led to prosper and wealth which eventually led to hierarchy.