The army of defeated all the city-states of sumer and conquered northern mesopotamia. (sargon i/kish)

The army of Sargon defeated all the city-states of Sumer and conquered northern Mesopotamia.

The Mesopotamia was the reign of Sargon of Akkad from 2334 to 2279 BCE. In fact, his reign constituted the first ancient multi-national empire of Mesopotamia.

Sargon also conquered parts of Syria, Anatolia, and Elam (western Iran).  The region of the Mesopotamia includes the area that is now eastern Syria, southeastern Turkey, and most of Iraq. Its name derives from a Greek word meaning “between rivers,” which makes reference to the land between the Tigris and Euphrates rivers.

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."

this is a good question! i'll do some research and come back when i have the answer!