In this essay I will give a short history of the government in United States of America (U.S.). Then I will describe each of the three branches of government in the U.S. and the relationship between them.
In principle, the U.S. is a democratic republic, they govern themselves by choosing their leaders by secret ballot, and these leaders in turn make the rules. Americans started "governing themselves" as a nation on July 4th, 1776, when the Declaration of Independence was signed in Philadelphia by representatives of the thirteen British colonies in North America. These states joined together formally in 1781 under a first "constitution," the Articles of Confederation. That loose union of the states was replaced by the Constitution of the U.S. in 1789. This document (amended 26 times) is still the political foundation of the U.S. Being based on a written constitution, the U.S. government is committed in principle to the rule of law. To guarantee the rights of free speech, a free press, freedom of religion etc. the first ten amendments, called the "Bill of Rights" were adopted in 1791.
There are three levels of government in the U.S. Local government (city/county), state government, and federal government. Here I will pay most attention to the federal government. Many of the concepts of the U.S. government can be traced to progressive thinkers of the seventeenth and eighteenth centuries, e.g. Locke, Spinoza, Blackstone, and Montesquiueu. Out of some of their thoughts the U.S. government system with the three branches were made: A legislative branch (Congress), an Executive branch (President), and a judicial branch (Supreme Court). The Constitution is most of all a document of checks and balances: among the three branches of the federal government; and between the levels of government, nation and state.
The legislative branch (Congress) that has