Sumer / Sumerians

Around 3500 B.C. in Southern Mesopotamia the people known as Sumerians made up the world's first civilization. They learned to control the Tigris and Euphates rivers by constructing levees and irrigation canals. There was no building stone and hardly any trees in Sumer, so the people built city walls, public buildings and their homes out of sun dried mud brick.
Some people believe that this is where the Garden of Eden was.

They evolved into self governing city states. They took pride in their city states. At times they were at war with each other because of boundary issues. They would even attack a neighbour to prove its strength. Some of the chief cities were Ur, Erech and Kish.