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  It superseded the Articles of Confederation, the nation's first constitution. Originally comprising seven articles, it delineates the national frame of government.
- September 17, 1787
- June 21, 1788
- March 4, 1789
- United States of America
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Since 1787, Congress has written 33 amendments to change the Constitution, but the states have ratified only 27 of them.
1. Mayflower Compact 2. Fundamental Orders of Connecticut 3. Massachusetts Body of Liberties 4. English Bill of Rights 5. Federalist Papers 6. United States Bill of Rights
1. Alexander Hamilton 2. Gouverneur Morris 3. John Jay 4. James Madison 5. John Marshall 6. Thomas PaineAmar, Akhil Reed (2005). "In the Beginning". America's Constitution: A Biography. New York: Random House. ISBN 1-4000-6262-4.Bailyn, Bernard, ed. The Debate on the Constitution: Federalist and Antifederalist Speeches, Articles, and Letters During the Struggle for Ratification. Part One: September 1787 to February 1788 (T...Bailyn, Bernard, ed. The Debate on the Constitution: Federalist and Antifederalist Speeches, Articles, and Letters During the Struggle for Ratification. Part Two: January to August 1788 (The Librar...Edling, Max M. (2003). A Revolution in Favor of Government: Origins of the U.S. Constitution and the Making of the American State. Oxford University Press. ISBN 0-19-514870-3.
1. The National Archives Experience — Constitution of the United States 2. The National Archives Experience — High Resolution Downloads of the Charters of Freedom 3. Full text of U.S. Constitution 4. Full text of The Bill of Rights 5. Full text of the amendments
Official U.S. government sources
1. Analysis and Interpretation of the Constitution of the United States Archived 2006-12-06 at the Wayback Machine: Annotated constitution, with descriptions of important cases (official publication of U.S. Senate) 2. United States Constitution and related resources: Library of Congress 3. CIA World Fact Book Archived 2015-07-06 at the Wayback Machine
Non-government web sites
1. US Constitution[permanent dead link]in basic English 2. US Law Dictionary Archived 2006-08-12 at the Wayback Machine 3. Audio version of US Constitution: free mp3 download 4. The Constitution Society: Research and public education on the principles of constitutional republican government 4.1. Text of the constitution Archived 2007-03-04 at the Wayback Machine 5. Law about...the Constitution: An overview of constitutional law from the Legal Information Institute 6. The U.S. Constitution Onl...
The United States Constitution has served as the supreme law of the United States since taking effect in 1789. The document was written at the 1787 Philadelphia Convention and was ratified through a series of state conventions held in 1787 and 1788.
Article Five of the United States Constitution details the two-step process for amending the nation's frame of government. Amendments must be properly proposed and ratified before becoming operative. This process was designed to strike a balance between the excesses of constant change and inflexibility. No.SubjectRatification  (proposed)Ratification  (completed)Protects freedom of religion, freedom of ...September 25, 1789December 15, 1791Protects the right to keep and bear armsSeptember 25, 1789December 15, 1791Restricts the quartering of soldiers in ...September 25, 1789December 15, 1791Prohibits unreasonable searches and ...September 25, 1789December 15, 1791
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The following is a list of the current constitutions of the statesin the United States. Each entry shows the ordinal number of the current constitution, the official name of the current constitution, the date on which the current constitution took effect, and the estimated length of the current constitution. Also below are a description of organic ...Bryce, James, viscount. The American Commonwealth (2nd ed., rev.; London: Macmillan and Co., 1891), vol. 1, p. -445, -724, et passim.Hammons, Christopher W. (1999). Was James Madison wrong? Rethinking the American preference for short, framework-oriented constitutions. American Political Science Review. Dec. 1999.Robinson Woodward-Burns. 2021. Hidden Laws: How State Constitutions Stabilize American Politics.Yale University Press.
The history of the United States Constitution is a history of how the government of the United States functions, its rule of law and the rights guaranteed to its citizens. It was signed by the delegates to the Constitutional Convention in Philadelphia on September 17, 1787. 
Usually, for an amendment to be approved and added to the Constitution, there are two steps: [a]  Two-thirds of both the United States Senate and the United States House of Representatives approve the amendment. They "propose" the amendment to the states (they send the amendment to the states to be ratified)