Explanation: The governmental concept of the separation of powers was incorporated into the U.S. Constitution to ensure that no single person or branch of the government could ever become too powerful. It is enforced through a series of checks and balances. Hope this helps, sorry if its wrong, and have a nice day.
They became sedentary. they started to use agriculture to create a surplus of food and as the need for farmers decreased; different duties emerged and that led to the formation if civilizations.
