How did the ability to write change the lives of people from ancient Sumer

In the explanation. :)

Explanation:

A few thousand years later, as variations on the two systems spread throughout the region, the entire ancient world had writing schemes that vastly improved the efficiency of economies, the accountability of governments and, maybe most importantly to us, our understanding of the past.

Reading and writing in ancient times wasn't for the masses, however. Daily life in Mesopotamia and Egypt was time-consuming, and so writing became a specialized profession, usually for members of the elite class. The highly-regarded scribes of ancient Mesopotamia were even depicted in art wearing cuneiform writing implements (a bit like a set of chopsticks) in their belts as a mark of their importance.

social contract theory basically says that all individuals are born equal, and provided a god given right to consent to be governed. american government is based of this

thomas hobbes and john locke said that we are selfish, individualistic, and constantly at war with each other, therefore we need to be controlled. 

government is defined as the legitimate use of force to control human behavior within territorial boundaries, here comes in hobbes and locke.

hobbes takes the part about controlling human behavior. while locke takes the part of legitimate use of force, since force is not legitimate unless there is consent of the people. 

there are basically 3 goals of the government: 1) maintain order by protecting life and property. 2) providing public goods, those which are typically not provided by the public sector, such as roads and education. 3) promote equality be it political, opportunist or outcome equality.