How did the various first civilizations differ from one another?

The various civilizations differ from one another because of how government rule over the people, how they run the social hierarchy in their civilization, their way of writing, the technology and tools that they use and lastly, their way of living.

rosevelt. 1973. "slaves everywhere"

social contract theory, nearly as old as philosophy itself, is the view that persons' moral and/or political obligations are dependent upon a contract or agreement among them to form the society in which they liv