The U.S Constitution is a document that established Americas national government, certain laws, and rights for the citizens.It is based on six principals, Popular Sovereignty, Limited Government, Separation of Power, Checks and Balances, Federalism, and Representative Government. The document was singed on September 17, 1787, by delegates to the Constitutional Convention in Philadelphia. The American people drafted the constitution because they wanted a better federal government.
Popular sovereignty is when the people are the source of the government's power. Therefore, people control the government. In the preamble it has the quote "We the people", which refers to this.