
On June 21, 1788, the US Constitution was officially adopted when New Hampshire became the ninth state to ratify it. The Constitution became the official framework of the government of the United States of America, replacing the Articles of Confederation, which had been in force since 1781. The Constitution was drafted by the Constitutional Convention, convened by Congress to address the shortcomings of the Articles of Confederation, which had proven inadequate in dealing with the challenges facing the young nation. The new framework defined the basic structure of the federal government, outlining the legislative branch and the manner of election and qualifications for members of Congress. One year after the Constitution was approved, ten amendments known as the Bill of Rights were ratified on December 15, 1791.
| Characteristics | Values |
|---|---|
| Date of adoption | June 21, 1788 |
| State that adopted | New Hampshire |
| Position of the state | Ninth state to ratify |
| Number of states required for ratification | Nine |
| Previous governing document | Articles of Confederation |
| Date the new government officially started operating | March 4, 1789 |
| Date the Bill of Rights was ratified | December 15, 1791 |
| Date all 13 states ratified the Constitution | May 29, 1790 |
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What You'll Learn

The US Constitution was adopted on 21 June 1788
On June 21, 1788, the US Constitution was officially adopted when New Hampshire became the ninth state to ratify the document. This was a significant moment in the history of the United States as it established the official framework for the government of the country. The Constitution replaced the Articles of Confederation, which had served as the first constitution of the United States but had been deemed inadequate in addressing the challenges facing the young nation.
The road to the adoption of the US Constitution was long and challenging. The Articles of Confederation, adopted in 1777 and effective from 1781, established a "league of friendship" between the 13 independent states. However, it became evident that a stronger, more centralised government was needed to ensure future stability. Alexander Hamilton led the call for a constitutional convention, and on May 25, 1787, representatives from all 13 states gathered in Philadelphia to begin the process of drafting a new constitution.
The Constitutional Convention, led by George Washington, engaged in months of debate and deliberation. The final document, signed by 38 or 39 delegates, created a strong federal government with a system of checks and balances. However, the battle for ratification was fiercely contested, with Anti-Federalists resisting the new Constitution in several states. Despite these challenges, by June 21, 1788, the required nine out of 13 states had ratified the Constitution, and it officially became the law of the land.
The adoption of the US Constitution set in motion a series of important milestones. The first federal elections were held between December 1788 and January 1789, and on March 4, 1789, the new government officially began operating. In September 1789, Congress adopted 12 amendments to the Constitution, known as the Bill of Rights, and sent them to the states for ratification. Ten of these amendments were ratified on December 15, 1791, further shaping the rights and freedoms guaranteed to Americans under the Constitution.
The US Constitution continues to be the oldest written constitution in operation today, guiding the government, protecting the rights of citizens, and inspiring democracies worldwide.
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New Hampshire was the ninth state to ratify the Constitution
On June 21, 1788, New Hampshire became the ninth state to ratify the United States Constitution, which then became the official framework of the US government. The road to ratification was not straightforward, and the outcome was uncertain.
The Articles of Confederation, which was the first constitution of the United States, was ratified in 1781. However, it became clear to some American leaders that a stronger, more centralized government was needed. Alexander Hamilton of New York led the call for a constitutional convention to reevaluate the nation's governing document, and representatives from all 13 states were invited to convene in Philadelphia on May 25, 1787.
The ratification process for the new Constitution began, and by early 1788, Delaware, Pennsylvania, and New Jersey had voted in favor. Connecticut and Georgia soon followed. However, there was opposition from Anti-Federalists, and the Federalists feared defeat in New Hampshire. They adjourned the convention, which sent shockwaves across the country.
When the New Hampshire convention reconvened in mid-June 1788, the Federalists had developed a contingency plan to minimize potential damage. Despite this, no one could predict the outcome. Ultimately, New Hampshire ratified the Constitution, becoming the ninth state to do so. This put the Constitution into effect, as Article VII stated that the ratification of nine states was sufficient for its establishment.
The Constitution was not ratified by all states until May 29, 1790, when Rhode Island approved it. The Bill of Rights, consisting of ten amendments, was ratified on December 15, 1791.
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The Constitution was ratified by all 13 states by 29 May 1790
The United States Constitution was ratified on June 21, 1788, when New Hampshire became the ninth state to approve the document. However, it took almost two more years for all 13 states to ratify the Constitution, with Rhode Island being the last state to do so on May 29, 1790.
The road to the ratification of the Constitution was long and arduous. The country was previously governed by the Articles of Confederation, which were established in 1781. The Articles gave significant power to the states, allowing them to act more like independent, sovereign countries. However, it became apparent to some American leaders that a stronger, more centralized government was necessary for future stability. Alexander Hamilton of New York led the call for a constitutional convention to reevaluate the nation's governing document.
The Confederation Congress endorsed Hamilton's initiative, and representatives from all 13 states were invited to convene in Philadelphia on May 25, 1787. The initial purpose of the convention was to amend the Articles of Confederation, but the delegates ultimately proposed and created a new form of government. The proposed government consisted of three branches—legislative, executive, and judicial—each designed to check and balance the power of the other branches.
The process of ratification was not without challenges. There were strong objections from anti-Federalists, who opposed the Constitution and favoured a weaker central government. On the other side were the Federalists, who supported the Constitution and advocated for a stronger central government. The Federalists worked to address concerns and secure the necessary votes for ratification.
By December 7, 1787, six states had ratified the Constitution, and by June 21, 1788, the required nine out of 13 states had approved it, making it the official framework for the government of the United States. However, it took until May 29, 1790, for all 13 states to ratify the Constitution, with Rhode Island being the last holdout. The Bill of Rights, consisting of the first ten amendments to the Constitution, was ratified on December 15, 1791.
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The Bill of Rights was ratified on 15 December 1791
The Bill of Rights, comprising ten amendments, was ratified on 15 December 1791. This was just over three years after the US Constitution was adopted.
The US Constitution was ratified on 21 June 1788 when New Hampshire became the ninth state to approve it. The Constitution was the official framework of the government of the United States of America, and it replaced the Articles of Confederation, which had been in force since 1781. The Articles of Confederation had established a league of friendship between the 13 independent states, but it had become clear to some of America's leaders that a stronger, more centralised government was needed.
The journey to ratifying the Constitution was long and challenging. The new framework for governance was crafted by the Constitutional Convention in September 1787, and it was then sent to the states for debate and ratification votes. The Federalists worked hard to collect votes, and Delaware, New Jersey, Georgia, and Connecticut quickly assembled their state conventions and ratified the document. However, there was strong opposition from Anti-Federalists in states like New York, Massachusetts, and Virginia.
The Bill of Rights, which was ratified just over three years after the Constitution, comprised ten of the twelve amendments sent by President Washington to the states for ratification in 1789.
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The US Constitution was the official framework of the government
On June 21, 1788, the US Constitution became the official framework of the government of the United States of America. This occurred when New Hampshire became the ninth of 13 states to ratify it. The road to ratification, however, was lengthy and challenging. Prior to the ratification of the new Constitution, the Articles of Confederation, which had been in effect since 1781, governed the country.
The Articles of Confederation were established as a "league of friendship" between the 13 independent states following the American Revolution. However, it became evident to some American leaders that a stronger, more centralised government was necessary for future stability. New York's Alexander Hamilton led the call for a constitutional convention to re-evaluate the nation's governing document. As a result, on May 25, 1787, representatives from all 13 states convened in Philadelphia.
The Articles of Confederation had proven inadequate in addressing the issues facing the new nation, including war debts, piracy in the Mediterranean, and rebellion in rural Massachusetts. The delegates emerged from the convention with a new framework for governance, and the fight for ratification in the states began. Nine states were required to ratify the Constitution, and the Federalists quickly gathered votes. Delaware, New Jersey, Georgia, and Connecticut were among the first states to ratify the document.
The ratification of the Constitution was not without opposition. Anti-Federalists fought fiercely in state conventions, particularly in New York, Massachusetts, and Virginia. However, their efforts were ultimately unsuccessful, and on June 21, 1788, New Hampshire became the critical ninth state to ratify. With this, the Constitution was officially adopted, and the new government officially began operating on March 4, 1789. The US Constitution has since guided the government, protected the rights of Americans, and inspired democracies worldwide.
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Frequently asked questions
21 June 1788.
On this date, New Hampshire became the ninth state to ratify the Constitution, making it the official framework of the government of the United States of America.
Before the US Constitution was adopted, the country was governed by the Articles of Confederation, which established a "league of friendship" between the 13 independent states.
One year after the US Constitution was adopted, on 21 June 1789, the new government officially started operating.

























