The Three Branches of the U.S. Government
U.S. Constitution
The Founding Fathers, the framers of the U.S. Constitution, wanted to form a government that did not allow one person to have too much control. With this in mind, they wrote the Constitution to provide for a separation of powers, or three separate branches of government - Legislative, Executive & Judicial.
Each branch has its own responsibilities and at the same time, the three branches work together to make the country run smoothly and to assure that the rights of citizens are not ignored or disallowed. This is done through checks and balances. A branch may use its powers to check the powers of the other two in order to maintain a balance of power among the three branches of government.