american constitution

The Constitution of the United States is the supreme law of the United States of America. It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constitution defined the foundational structure of the federal government.
The drafting of the Constitution by many of the nation's Founding Fathers, often referred to as its framing, was completed at the Constitutional Convention, which assembled at Independence Hall in Philadelphia between May 25 and September 17, 1787. Influenced by English common law and the Enlightenment liberalism of philosophers like John Locke and Montesquieu, the Constitution's first three articles embody the doctrine of the separation of powers, in which the federal government is divided into the legislative, bicameral Congress; the executive, led by the president; and the judiciary, within which the Supreme Court has apex jurisdiction. Articles IV, V, and VI embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relationship to the federal government, and the process of constitutional amendment. Article VII establishes the procedure used to ratify the constitution.
Since the Constitution became operational in 1789, it has been amended 27 times. The first ten amendments, known collectively as the Bill of Rights, offer specific protections of individual liberty and justice and place restrictions on the powers of government within the U.S. states. Amendments 13–15 are known as the Reconstruction Amendments. The majority of the later amendments expand individual civil rights protections, with some addressing issues related to federal authority or modifying government processes and procedures. Amendments to the United States Constitution, unlike ones made to many constitutions worldwide, are appended to the document.
The Constitution of the United States is the oldest and longest-standing written and codified national constitution in force in the world. The first permanent constitution, it has been interpreted, supplemented, and implemented by a large body of federal constitutional law and has influenced the constitutions of other nations.

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