As early cities developed in different parts of the world, people often developed writing systems. in mesopotamia, the earliest writing system was used primarily for

The earliest writing system used to communicate through pictures that tell about the crops in the fields and the taxes of the people. They also used it for counting animals, people, fruits, tools, etc. It also became a way of expressing Sumerian Language through writing form. 

Because he proposed that all the treaties should be made through the league of nations.

Herodotus taught that absolute right and wrong did exist.