Answer:
The ancient Mesopotamia's created a government that was a combination of monarchy and democracy. The kingdoms of Sumer were organized into city-states and the Kings ruled each city-states for the gods. They were assisted by priests,Steinkeller (1999) assumes that in early Mesopotamia kings drew their power from being priests for female deities. After a male deities became more prominent in the pantheon a split of secular and sacred power took place which led to the invention of the military leader who assumed secular power and became the king. scribes, and nobles.
The earliest listed ruler whose historicity has been archaeologically verified is Enmebaragesi of Kish, c. 2600 BC. Reference to him and his successor, Aga of Kish, in the Epic of Gilgamesh has led to speculation that Gilgamesh himself may have been a historical king of Uruk.