
The United States Constitution, written in 1787, is the world's longest surviving written constitution. The Founding Fathers intended the document to be flexible to accommodate the changing needs of the country. Since 1789, there have been over 11,000 proposed amendments introduced in Congress, with only 27 being ratified and enshrined in the Constitution. The Constitution has been amended 27 times since its drafting, including the Bill of Rights, which was adopted in 1791. The document has transformed through amendments and legal rulings, but the process of amending it is intentionally difficult. The Constitution can be amended through two pathways: by a two-thirds vote in both houses of Congress or by a two-thirds vote of state legislatures petitioning for a constitutional convention. Despite numerous calls for a Second Constitutional Convention, or Article V Convention, none have been successful.
| Characteristics | Values |
|---|---|
| Number of times the U.S. Constitution has been amended | 27 |
| Number of proposed amendments introduced in Congress since 1789 | 11,000+ |
| Number of amendments sent to the states for ratification | 33 |
| Number of amendments that have obtained ratification | 27 |
| Number of states that ratified the Constitution | 11 |
| Number of states needed to ratify the Constitution | 9 |
| Number of states needed to ratify any proposed revision | 34 |
| Number of states that have built-in constitutional mechanisms for periodic revision | 20 |
| Number of petitions from state legislatures calling for a constitutional convention | 400 |
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What You'll Learn
- The US Constitution has been amended 27 times since 1787
- The first 10 amendments were adopted in 1791 as the Bill of Rights
- The US Constitution is the world's longest-surviving written constitution
- The Constitutional Convention in 1787 voted in favour of the Constitution
- The Constitution has been criticised for not protecting individual rights

The US Constitution has been amended 27 times since 1787
The US Constitution, written in 1787 and ratified by nine of the original 13 states a year later, is the world's longest-surviving written constitution. The Founding Fathers intended the document to be flexible in order to fit the changing needs and circumstances of the country. The US Constitution has been amended 27 times since 1787, including the first ten amendments adopted four years later as the Bill of Rights.
The US Constitution was drafted to "endure for ages to come". To ensure its longevity, the framers made it a challenging process to amend the document. Amending the Constitution requires a proposal by two-thirds of both houses of Congress or a national convention called by two-thirds of the state legislatures. The proposed amendment must then be ratified by three-fourths of the states, either through their legislatures or special ratifying conventions. This process has only been completed 27 times in over 200 years, demonstrating the difficulty of amending the Constitution.
The first ten amendments to the Constitution, known as the Bill of Rights, were ratified on December 15, 1791. These amendments protect various civil liberties, such as freedom of speech, religion, and assembly, as well as the right to keep and bear arms. The Bill of Rights also includes protections for accused criminals, such as the right to a speedy trial and the prohibition of cruel and unusual punishment.
Beyond the Bill of Rights, there have been 17 additional amendments to the Constitution. These amendments address a range of issues, including the election process, income tax, and the rights of citizens. For example, the 12th Amendment, ratified in 1804, mandated that electors vote separately for the president and vice president. The 17th Amendment changed the election process for the US Senate, giving Americans the right to elect senators directly. The 16th Amendment, ratified in 1913, granted the government the power to collect income tax, despite the prohibition against a "direct tax" in Article I of the Constitution.
While there has never been a new Constitutional Convention, some individuals have advocated for one. A retired federal judge, Malcolm R. Wilkey, argued that the Constitution has been corrupted by gridlock, interest groups, and members of Congress more focused on reelection than governing. However, others, such as Richard C. Leone, president of the Twentieth Century Fund, believe that efforts to amend the Constitution in response to dissatisfaction with the government may be overreactions.
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The first 10 amendments were adopted in 1791 as the Bill of Rights
The United States Constitution has been amended only 27 times since it was drafted in 1787. The first ten amendments, also known as the Bill of Rights, were adopted in 1791. James Madison wrote these amendments to limit government power and protect individual liberties.
The First Amendment protects the freedom of speech and the free exercise of religion. It also prohibits Congress from making laws that establish a national religion or abridge freedom of speech. The Third Amendment prohibits the quartering of soldiers in civilian homes without the owner's consent. The Fourth Amendment safeguards citizens' right to be secure in their persons, houses, papers, and effects against unreasonable searches and seizures. The Tenth Amendment reserves powers to the states or the people that are not delegated to the United States by the Constitution.
The Bill of Rights was added to the Constitution to address concerns about the lack of limits on government power. The amendments were proposed by Congress in 1789 and received the ratification of three-fourths of the state legislatures, becoming part of the Constitution on December 15, 1791. The process of amending the Constitution is deliberately difficult, requiring the approval of two-thirds of both houses of Congress or two-thirds of the states applying for a constitutional convention, followed by the ratification of three-quarters of the states.
While there have been efforts to revise or replace the Constitution throughout its history, none have been successful. The average lifespan of constitutions globally is just 17 years, and some argue that the US Constitution needs an overhaul to address issues such as congressional term limits, a balanced budget amendment, and the influence of interest groups. However, amending the Constitution is a complex and challenging process, and the document was written "to endure for ages to come".
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The US Constitution is the world's longest-surviving written constitution
The US Constitution, written in 1787 and ratified in 1788, is the world's longest-surviving written constitution. It has been amended only 27 times since it was drafted, including the first ten amendments, which were adopted in 1791 as the Bill of Rights. The Founding Fathers intended the document to be flexible to accommodate the changing needs and circumstances of the country.
The Constitution was created to replace the Articles of Confederation, which gave the Confederation Congress the power to make rules and request funds from the states, but it had no enforcement powers, couldn't regulate commerce, or print money. The disputes between the states over territory, war pensions, taxation, and trade threatened to tear the young nation apart. James Madison, Alexander Hamilton, and George Washington, fearing the country was on the brink of collapse, helped convince Congress to organize a Grand Convention of state delegates to work on revising the Articles. The delegates came up with a completely new form of government, creating a powerful central government.
The process of amending the Constitution is outlined in Article V of the Constitution. Amendments can be proposed by Congress with a two-thirds majority vote in both houses or by a constitutional convention called for by two-thirds of the states. Once an amendment is proposed, it must be ratified by three-quarters of the states to become part of the Constitution.
Despite the relatively few amendments, the Constitution has transformed in critical ways through these amendments and legal rulings. For example, the 12th Amendment, ratified in 1804, addressed a potential constitutional crisis by mandating that electors vote separately for president and vice president.
In recent times, there have been increasing calls for constitutional reform, with some arguing that the Constitution is in desperate need of repair. However, efforts to amend the Constitution have faced challenges due to the difficulty of the process, as intended by the framers.
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The Constitutional Convention in 1787 voted in favour of the Constitution
The Constitutional Convention of 1787, also known as the Philadelphia Convention, was a pivotal event in American history, culminating in the creation and ratification of the United States Constitution. The convention was convened in response to the weaknesses of the Articles of Confederation, which served as America's first constitution. The Articles had established the Confederation Congress, granting it the authority to request funds and make rules for the states, but it lacked enforcement powers, the ability to regulate commerce, and the capacity to print money. This resulted in disputes over territory, war pensions, taxation, and trade, threatening the cohesion of the fledgling nation.
The convention took place from May 25 to September 17, 1787, in the Assembly Room of the Pennsylvania State House, later renamed Independence Hall. Fifty-five delegates from 12 states participated, with Rhode Island being the only state not represented. The delegates, including prominent figures such as George Washington, Benjamin Franklin, and James Madison, sought to address the deficiencies of the Articles of Confederation and establish a more robust and effective system of government.
The convention was marked by intense debates, compromises, and the careful crafting of a new governing document. One of the most contentious issues was the balance of power between the states and the central government. The Federalists advocated for a strong central government, while the Anti-Federalists opposed a powerful central authority, reminiscent of the one they had recently overthrown. The delegates also grappled with the issue of slavery, with five of the states represented still practising it. Despite their differences, the delegates were committed to creating a government with limited powers, ensuring the division of power between the states and the nation to alleviate concerns about centralised authority.
The final version of the Constitution was voted on by the delegates and signed by 39 of them on September 17, 1787. The document was then sent to the states for ratification, with nine states needing to approve for it to come into effect. The ratification process was not without challenges, as Anti-Federalists continued to oppose the Constitution due to its lack of a bill of rights. However, the "vote now, amend later" compromise helped secure its passage in several states, and on July 2, 1788, New Hampshire became the ninth state to ratify, making the Constitution the law of the land.
While the Constitution has been amended only 27 times since its drafting, reflecting the framers' intention for it to endure, there have been calls for a new Constitutional Convention to address concerns about gridlock, the influence of interest groups, and the excessive focus of Congress on re-election. However, others argue that recent efforts to amend the Constitution are excessive and that the document has proven its longevity and adaptability over time.
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The Constitution has been criticised for not protecting individual rights
The Constitution of the United States has been criticised for not adequately protecting individual rights. The original text of the Constitution contained very few provisions protecting individual rights. This was likely due to the beliefs held by some framers that the central government they had created had limited powers and would not violate individual rights. Others feared that any list of rights might be incomplete and might later be used to deny rights not listed.
During the ratification process, several state legislatures expressed concern over the lack of protection of individual liberties. In response, the first Congress passed twelve amendments to the Constitution, ten of which were ratified by the states and became known as the Bill of Rights. The rights contained in the Bill of Rights were originally construed to apply only against the federal government and not against state or local governments. The rights of individuals were protected from state intrusion only by the state constitutions themselves.
The first ten amendments to the Constitution make up the Bill of Rights. James Madison wrote the amendments as a solution to limit government power and protect individual liberties through the Constitution. For example, the Founders saw the ability to speak and worship freely as a natural right protected by the First Amendment. The First Amendment also protects freedom of speech and of the press. It also protects the right of peaceful assembly and to petition the government. The Fourth Amendment safeguards citizens' right to be free from unreasonable government intrusion in their homes through the requirement of a warrant. The Sixth Amendment guarantees the right to a speedy and public trial, by an impartial jury. The Eighth Amendment prohibits excessive bail, excessive fines, and cruel and unusual punishments.
The coverage of most of the Bill of Rights has been expanded to the actions of state and local governments, but it does not generally apply to private conduct. With some exceptions, private persons and organizations do not have to comply with the Constitution. For instance, while a public university cannot unduly restrict the free speech rights of its students, private universities are not subject to this rule.
Despite these amendments, the Constitution has been criticised for not going far enough to protect individual rights. A retired federal judge, Malcolm R. Wilkey, called for a new convention, arguing that the Constitution has been corrupted by a system that has led to gridlock and excessive influence by interest groups. However, some believe that recent efforts to amend the Constitution go too far.
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Frequently asked questions
The US Constitution has been amended 27 times since it was drafted in 1787, including the first 10 amendments adopted four years later as the Bill of Rights. The Founding Fathers intended the document to be flexible in order to fit the changing needs and circumstances of the country. The US Constitution is the world's longest-surviving written constitution.
Article V of the US Constitution stipulates two ways to amend it. One way is for a member of Congress to propose an amendment. That proposal then needs two-thirds approval in both the House and the Senate before it goes to the states for ratification. The second way is for two-thirds of state legislatures to petition Congress for a constitutional convention.
One of the biggest early criticisms of the Constitution was that it did not do enough to protect the rights of individuals against infringement by the nation’s new central government. More recently, some critics have called for a complete rewrite of the Constitution, citing issues such as gridlock, the influence of interest groups, and members of Congress focusing excessively on getting re-elected.

























