The US Constitution
A few thousand words, drafted in a hot Philadelphia summer, that still decide who gets to run the country and how.
By Greg Goodwin · Published October 17, 2026 · Updated October 24, 2026
Cheat Sheet
- Date and count: signed September 17, 1787; 55 delegates attended the convention and 39 signed.
- Structure: a preamble and seven articles; Articles I, II and III set up Congress, the presidency and the courts.
- Age minimums: 25 for the House, 30 for the Senate, 35 plus 14 years of US residency for the President.
- Ratification: Article VII required nine states; New Hampshire's 57-47 vote on June 21, 1788 was the ninth.
- Amending: two-thirds of both houses of Congress (or a convention called by two-thirds of the states), then three-fourths of the states.
- Holdouts: George Mason, Edmund Randolph and Elbridge Gerry were present but refused to sign.
The 60-Second Version
The US Constitution is the supreme law of the United States and the blueprint for its federal government. Written at a convention in Philadelphia in the summer of 1787 and signed on September 17 of that year, it replaced the looser arrangement of the Articles of Confederation with a stronger national government. It opens with the famous "We the People" preamble and then divides power among three branches: Congress to make laws, a President to carry them out, and federal courts to interpret them. Each branch is checked by the others, and power is split between the national government and the states. The document took effect after nine of the thirteen states ratified it, and it has been formally changed through amendments, the first ten of which form the Bill of Rights. It is short enough to read in an afternoon, and nearly every American political fight eventually points back to a sentence in it.
The Long Version
The Convention in Philadelphia
Of the 74 deputies chosen by the state legislatures, Britannica reports, only 55 took part in the proceedings, and 39 of them signed the finished document on September 17, 1787. George Washington appears at the top of the signatures as "Presidt and deputy from Virginia," and the signers also include Benjamin Franklin, Alexander Hamilton and James Madison. The National Archives notes that the count reached 39 because George Read signed on behalf of the absent John Dickinson. The parchment text was inscribed by Jacob Shallus and is on permanent display at the National Archives in Washington. The convention had been called to fix the Articles of Confederation, and it ended up writing something new.
The Blueprint
Article I gives all legislative power to a Congress of two chambers. House members serve two-year terms and must be at least 25; senators serve six-year terms and must be at least 30. Senators were divided into three classes so that one-third face election every two years. Article II vests executive power in a President serving a four-year term who must be at least 35, a natural-born citizen, and 14 years a US resident. Article III creates one Supreme Court and lets Congress create lower courts, with judges holding office during good behavior. Checks and balances run throughout: the President can veto a bill, but two-thirds of both houses can override; the House holds the sole power of impeachment and the Senate tries the case, where conviction needs two-thirds of those present.
Compromises and Moral Failures
The document is a bundle of bargains. Every state gets two senators, while House seats follow population, and the original text lists a starting number of representatives for each state. It also compromised on slavery. The three-fifths clause counted three-fifths of "all other Persons" for House apportionment and direct taxes, Article I prohibited Congress from barring the importation of enslaved people before 1808, and Article IV required the return of people escaping from "Service or Labour." The text avoids the word slavery, but the provisions are plain. Later amendments overrode these clauses, including the post-Civil War amendments. Understanding the Constitution means seeing both the structure it built and the injustices it tolerated.
The Ratification Fight
Article VII declared that the approval of nine states would be enough to establish the Constitution among those states. Three of those present, George Mason, Edmund Randolph and Elbridge Gerry, refused to sign, and a common objection was the lack of a bill of rights. New Hampshire became the ninth state to ratify on June 21, 1788, by a vote of 57 to 47, and one source dates the start of government under the Constitution to March 4, 1789. The first ten amendments, the Bill of Rights, followed.
A Living Document
Article V sets a deliberately high bar for change: two-thirds of both houses of Congress (or a convention called by two-thirds of the state legislatures) must propose an amendment, and three-fourths of the states must ratify it. Only 27 amendments have succeeded. They rewrote parts of the original, such as the Twelfth Amendment on presidential electors, the Fourteenth on the three-fifths clause, the Sixteenth on income taxes, the Seventeenth on electing senators by popular vote, and the Twenty-fifth on presidential succession. Beyond formal amendments, courts and Congress keep reinterpreting its short phrases, which is why the argument over what the text means never ends.
Why People Care
The Constitution defines who holds power, what government may not do, and how rules can change. Most US legal and political disputes, from elections to free speech to the limits of presidential authority, are arguments about what its words mean.
Glossary
- Preamble
- The opening 'We the People' passage that states the Constitution's purposes.
- Separation of powers
- Dividing government authority among legislative, executive and judicial branches.
- Article V
- The clause that sets out how the Constitution can be amended.
- Ratification
- Formal approval by the states that put the Constitution into effect.
- Supremacy Clause
- Article VI language making the Constitution and federal laws made under it the supreme law of the land.
Go Deeper
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- Alexander Fleming and Penicillin
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