Which example best defines a historical era? A A collection of art by a world-renowned artist
B A period of time characterized by certain political, social, or economic events
C A genre of music specific to a region of a country
D A piece of landmark legislation passed during a congressional session

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

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 live