The first characteristic these civilizations shared was the development of agriculture in their society through irrigation. The use of irrigation is most obvious in Ancient China where they would use various canals and water systems to flood fields, allowing them to farm rice. In Sumer the land was extremely fertile, but during the dry summers agriculture would have never been possible. Irrigation allowed the Sumerians to use the land to its fullest potential. The development of basin irrigation, a way of controlling the rise and fall of the Nile, allowed the Egyptians to prosper by farming crops such as barley and wheat. The development of agriculture through irrigation had a profound effect on these early civilizations and on the world as a whole.
Another characteristic these civilizations shared was the importance of religion in all facets of their society. An example in Chinese society of religion was the debate of Daoism versus Confucianism, and how it constantly affected society. The debate affected everything in the society from gender relations to the way the Chinese were governed. You can see how religiously centered the people of Sumer were as each city-state had their own patron god. The civilization that was most easily recognized as having heavy religious influence was Egypt. In Egypt the pharaoh, their version of a king, was treated as an earthly god and was constantly worshipped as such. Religion shaped the ways many of these societies functioned.
The final characteristic these societies shared was a monarchy form of government, which