page_title: History of the United States Constitution
section_title: Amendments to the Constitution
hierarchical_section_title: History of the United States Constitution / Amendments to the Constitution
caption_attribution_description: English: A diagram of the U.S. constitutional amendment process.
context_page_description: 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. Since 1789, the Constitution has been amended twenty-seven times; particularly important amendments include the ten amendments of the United States Bill of Rights and the three Reconstruction Amendments.
  The Constitution grew out of efforts to reform the Articles of Confederation, an earlier constitution which provided for a loose alliance of states with a weak central government. From May 1787 through September 1787, delegates from twelve of the thirteen states convened in Philadelphia, where they wrote a new constitution. Two alternative plans were developed at the convention. The nationalist majority, soon to be called "Federalists," put forth the Virginia Plan, a consolidated government based on proportional representation among the states by population. The "old patriots," later called "Anti-Federalists," advocated the New Jersey Plan, a purely federal proposal, based on providing each state with equal representation.
context_section_description: Since the beginning of federal operations under the Constitution in 1789 through the beginning of 2013, approximately 11,539 proposals to amend the Constitution have been introduced in the United States Congress. Of these, thirty-three have been approved by Congress and sent to the states for ratification. Twenty-seven of these amendments have been ratified and are now part of the Constitution. The first ten amendments were adopted and ratified simultaneously and are known collectively as the Bill of Rights. Prior to the Twenty-seventh Amendment, which languished for 202 years, 7 months, 12 days before being ratified (submitted for ratification in 1789 as part of the Bill of Rights, but not ratified until 1992), the Twenty-second Amendment held the record for longest time taken to successfully complete the ratification process – 3 years, 11 months, 6 days. The Twenty-sixth Amendment holds the record for shortest time taken – 3 months, 8 days. Six amendments adopted by Congress and sent to the states have not been ratified by the required number of states and are not part of the Constitution. Four of these are still technically open and pending, one is closed and has failed by its own terms, and one is closed and has failed by the terms of the resolution proposing it.
caption: The U.S. constitutional amendment process.
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