
The Constitution of the United States has been amended 27 times since it was enacted on March 4, 1789. Approximately 11,848 proposals to amend the Constitution have been introduced in Congress during this period. The first ten amendments, known as the Bill of Rights, were ratified simultaneously on December 15, 1791. The process of amending the Constitution is outlined in Article V of the Constitution, with the Archivist of the United States playing a crucial role in administering the ratification process.
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What You'll Learn

The US Constitution has 27 amendments
The US Constitution is a living document that has undergone several amendments to meet the needs of a changing society. Since it was enacted in 1789, there have been approximately 11,848 proposals to amend the Constitution, with members of the House and Senate proposing around 200 amendments during each two-year term of Congress. This demonstrates the active role of Congress in shaping the nation's laws and policies.
Out of all the proposals, 33 amendments have been proposed by the United States Congress and sent to the states for ratification. Of these, 27 amendments have been successfully ratified by the requisite number of states and are now an integral part of the Constitution. The process of amending the Constitution is a collaborative effort, with Congress proposing amendments and the states playing a crucial role in ratifying them.
The first ten amendments, collectively known as the Bill of Rights, were ratified simultaneously on December 15, 1791. These amendments form the foundation of individual liberties and freedoms, including freedom of speech, religion, and the press, as well as the right to peaceably assemble and bear arms. The Bill of Rights also protects citizens from unreasonable searches and seizures, ensuring their privacy and security.
Among the 27 amendments, some have gained particular significance. For example, the Twenty-first Amendment, ratified in 1933, repealed the Eighteenth Amendment and ended the prohibition of alcohol. This amendment stands out as the only one that explicitly overturns an earlier amendment, showcasing the dynamic nature of the Constitution.
The process of amending the Constitution is carefully outlined, with Congress proposing amendments and the Archivist of the United States administering the ratification process. Once an amendment is ratified by three-fourths of the states (38 out of 50), it becomes an official part of the Constitution. The certification of a new amendment is a ceremonial affair witnessed by dignitaries, including the President on some occasions. The US Constitution's 27 amendments are a testament to the nation's evolving nature and the commitment to uphold the values enshrined in this foundational document.
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The first 10 amendments are the Bill of Rights
The United States Constitution has been amended 27 times, with the first 10 amendments forming what is known as the Bill of Rights. These amendments were ratified on December 15, 1791, and they add to the Constitution specific guarantees of personal freedoms and legal rights. The concepts codified in these amendments build upon those in earlier documents, such as the Virginia Declaration of Rights (1776), the Northwest Ordinance (1778), the English Bill of Rights (1689), and the Magna Carta (1215).
The Bill of Rights was proposed following the 1787–88 debate over the ratification of the Constitution, which was often bitter, and it was written to address objections raised by Anti-Federalists. The amendments in the Bill of Rights provide explicit limitations on the federal government's power, declaring that all powers not specifically granted to the federal government by the Constitution are reserved for the states or the people.
The first amendment guarantees freedom of religion, speech, and the press, as well as the right to assemble and petition the government. The second amendment concerns the right to keep and bear arms, while the third amendment prohibits the quartering of soldiers in civilian homes without consent. The fourth amendment protects people against unreasonable searches and seizures, while the fifth amendment provides several protections for people accused of crimes, including the right against self-incrimination and the right to due process of law.
The sixth amendment provides additional protections for the accused, including the right to a speedy and public trial, an impartial jury, and the right to legal representation. The seventh amendment extends the right to a jury trial in federal civil cases, while the eighth amendment prohibits excessive bail and cruel and unusual punishment. Finally, the ninth amendment states that the listing of specific rights in the Constitution does not deny other rights not explicitly mentioned. The tenth amendment reinforces the principle of federalism by stating that the federal government only has the powers delegated to it by the Constitution.
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The Reconstruction Amendments
The 13th Amendment, proposed in 1864 and ratified in 1865, abolished slavery and involuntary servitude, except as punishment for a crime. It changed a portion of Article IV, Section 2 of the Constitution, which previously allowed for slavery and involuntary servitude. The 13th Amendment was swiftly ratified by all but three Union states: Delaware, New Jersey, and Kentucky.
The 14th Amendment, proposed in 1866 and ratified in 1868, addresses citizenship rights and equal protection under the law for all persons. It changed a portion of Article I, Section 2 of the Constitution. The 14th Amendment guarantees that all persons born or naturalized in the United States are citizens and are entitled to equal protection under the law. It also prohibits states from depriving any person of life, liberty, or property without due process of law.
The 15th Amendment, proposed in 1869 and ratified in 1870, prohibits the federal and state governments from denying a citizen the right to vote based on "race, color, or previous condition of servitude." This amendment was passed in the wake of the narrow election of Ulysses S. Grant to the presidency in 1868, which convinced a majority of Republicans that protecting the franchise of black men was important for the party's future.
While these amendments were intended to transform the United States and ensure the rights and freedoms of the formerly enslaved, their promise was eroded by state laws and federal court decisions throughout the late 19th century. It was not until the Supreme Court decision in Brown v. Board of Education in 1954, and the passage of civil rights legislation in the 1960s, that the full benefits of the Reconstruction Amendments were realized.
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The process of constitutional amendment
The Constitution of the United States has been amended 27 times since it was drafted in 1787. The process of amending the Constitution is outlined in Article V of the Constitution and is deliberately difficult and time-consuming.
The first step in the amendment process is for an amendment to be proposed. An amendment can be proposed in two ways: by Congress with a two-thirds majority vote in both the House of Representatives and the Senate, or by a constitutional convention called for by two-thirds of the state legislatures. To date, all 27 amendments have been proposed by Congress, and none have been proposed by constitutional convention. Once proposed, the amendment is sent to the states for ratification.
The ratification process is administered by the Archivist of the United States, who heads the National Archives and Records Administration (NARA). The Archivist has delegated many of the duties associated with this function to the Director of the Federal Register. The Archivist is responsible for determining the facial legal sufficiency of ratification documents, and their certification of the sufficiency is final and conclusive. When the required number of authenticated ratification documents has been received, the Archivist issues a certificate proclaiming that an amendment has become an operative part of the Constitution.
In most cases, an amendment must be ratified by three-fourths of the states to become part of the Constitution. This process typically takes place within seven years from the date of its submission to the states. However, there have been instances where amendments have not been ratified by the required number of states and have failed. As of January 3, 2019, approximately 11,848 proposals to amend the Constitution have been introduced in Congress, with members of the House and Senate proposing around 200 amendments during each two-year term of Congress.
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Amendments that have been proposed but not ratified
The Constitution of the United States has been amended several times since it was enacted in 1789. Approximately 11,848 proposals to amend the Constitution have been introduced in Congress as of January 3, 2019. Out of these numerous proposals, only 27 amendments have been successfully ratified and incorporated into the Constitution.
There have been several amendments proposed but not ratified by the required number of states. Six amendments adopted by Congress are pending ratification, with four still active and two closed. Here are some notable examples of amendments that were proposed but failed to gain sufficient ratification:
Child-Labor Amendment: Proposed in 1924, this amendment aimed to prohibit child labour and protect children from being exploited as workers. However, it failed to gain the necessary ratification from three-fourths of the states.
Proposed Article I: This amendment focused on regulating the number of representatives in Congress based on population size. It was proposed in the 2nd session of the 11th Congress but was not ratified at the time.
State Ratifying Conventions: This method of ratification requires state ratifying conventions in three-fourths of the states. Only the Twenty-first Amendment, ratified in 1933, has achieved this method of ratification. It repealed the Eighteenth Amendment, ending the prohibition of alcohol.
The process of amending the Constitution is deliberate and challenging, ensuring that any changes made are carefully considered and widely supported. While many amendments have been proposed, the high bar for ratification ensures that only those with significant consensus become part of the Constitution.
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Frequently asked questions
There have been 27 amendments to the US Constitution, beginning with the Bill of Rights, the first 10 amendments, ratified on December 15, 1791.
Approximately 11,848 proposals to amend the US Constitution have been introduced in Congress since 1789 (as of January 3, 2019).
Thirty-three amendments to the US Constitution have been proposed by the US Congress and sent to the states for ratification since the Constitution was put into operation on March 4, 1789.
























