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- The exact constitutional text
- Why the militia clause matters
- Congress proposed twelve articles in 1789
- Ratification occurred on December 15, 1791
- Early doctrine was limited
- Heller, McDonald, Bruen, and Rahimi
- Definition is not the same as a case outcome
- Frequently asked questions
- When was the Second Amendment ratified?
- Was the Second Amendment originally Article Four?
- Does “well regulated” mean modern firearm regulation?
- Sources
Key Facts
- Text: The Second Amendment protects “the right of the people to keep and bear Arms” and begins with a clause concerning a well regulated militia and the security of a free State.
- Proposal: Congress approved twelve proposed amendments on September 25, 1789; the provision that became the Second Amendment was the fourth article in that proposal.
- Ratification: Virginia’s approval supplied the necessary threshold on December 15, 1791, when ten proposed articles became the Bill of Rights.
- Modern doctrine: Heller recognized an individual right to possess a firearm for historically lawful purposes including self-defense in the home, and McDonald applied the right against the states.
- Not unlimited: Current doctrine evaluates covered conduct through constitutional text and the nation’s historical tradition of firearm regulation; the right is not an exemption from every firearm law.
The Second Amendment is one sentence with two connected clauses. A useful definition must account for both its militia language and its protection of the people’s right to keep and bear arms, while keeping the 1791 text distinct from legal tests developed by the Supreme Court more than two centuries later.
It was ratified on December 15, 1791 as part of the Bill of Rights. Congress had proposed it in 1789, and the numbering changed because only ten of the twelve proposed articles achieved ratification at that time.
The exact constitutional text
The Second Amendment states: “A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.” Capitalization and punctuation vary slightly among authenticated historical copies, but those differences do not create a different amendment.
The opening militia clause announces a reason; the operative clause protects a right of “the people.” In District of Columbia v. Heller, the Supreme Court read the operative clause to protect an individual right that was not limited to active militia service, while treating the prefatory clause as announcing a purpose consistent with that guarantee.
“Keep” was analyzed as possessing arms, and “bear” as carrying them for confrontation. The phrase “the people” also appears elsewhere in the Bill of Rights, but the scope of protected persons and conduct remains a doctrinal question in concrete cases.
Why the militia clause matters
Eighteenth-century Americans inherited concerns about standing armies, disarmament, and control of the militia. State ratifying conventions proposed protections addressing arms and militia organization after opponents criticized the original Constitution for lacking an express bill of rights.
James Madison’s June 1789 draft protected the right to keep and bear arms, described a well armed and well regulated militia as the best security of a free country, and included language about religiously scrupulous people not being compelled to render military service in person.
The House rearranged and revised the clauses. The Senate removed the conscientious-objector language, rejected other proposed phrases, and produced the wording transmitted to the states.
Historical drafting explains why both clauses appear. It does not permit either clause to be deleted, and it does not by itself resolve every modern firearm regulation.
Congress proposed twelve articles in 1789
Madison introduced proposed amendments in the House on June 8, 1789. The House approved seventeen amendments in August; the Senate consolidated and revised them into twelve.
On September 25, 1789, Congress agreed to the twelve articles and submitted them to the state legislatures under Article V. The President did not approve or veto the proposal because constitutional amendments proposed by Congress do not follow ordinary presentment.
The arms provision was Article the Fourth in the enrolled proposal. The first proposed article concerned apportionment, and the second concerned congressional compensation.
Ratification occurred on December 15, 1791
States considered the package article by article rather than accepting it only as an indivisible whole. By December 15, 1791, eleven states had ratified Articles Three through Twelve, satisfying the then-required three-fourths threshold.
Virginia’s ratification supplied the decisive approval. The ten ratified articles became Amendments One through Ten, so proposed Article Four became the Second Amendment.
The original Article Two concerning congressional compensation remained pending and was ratified in 1992 as the Twenty-Seventh Amendment. That later event helps explain why the 1789 proposal’s numbering differs from today’s Bill of Rights.
December 15 is observed as Bill of Rights Day. Later symbolic ratifications by states that had not approved the amendments in 1791 did not alter the date on which the constitutional threshold was reached.
Early doctrine was limited
For much of American history, the Supreme Court decided few Second Amendment cases. Nineteenth-century decisions also reflected the then-prevailing rule that the Bill of Rights constrained the federal government rather than applying directly to the states.
In United States v. Miller in 1939, the Court addressed a federal prosecution involving a short-barreled shotgun and discussed whether the weapon had a reasonable relationship to preservation or efficiency of a well regulated militia. Later courts disputed how broadly to read that decision.
Heller, McDonald, Bruen, and Rahimi
In 2008, Heller held that the Second Amendment protects an individual right to possess a handgun in the home for self-defense. The decision invalidated the District of Columbia’s handgun ban and functional-firearm restriction as applied in the case.
Heller also said the right is not unlimited. It identified examples of longstanding regulatory measures that its opinion did not cast into doubt, without purporting to provide an exhaustive list or decide every future case.
In 2010, McDonald v. City of Chicago held that the Second Amendment right recognized in Heller applies to state and local governments through the Fourteenth Amendment.
In 2022, New York State Rifle & Pistol Association v. Bruen held that the right extends to carrying a handgun publicly for self-defense and rejected the lower courts’ two-step means-end scrutiny. When the Amendment’s plain text covers conduct, the government must justify regulation as consistent with the nation’s historical tradition of firearm regulation.
In 2024, United States v. Rahimi clarified that historical analysis does not demand a historical twin. The Court upheld the federal prohibition at issue as applied to a person found by a court to pose a credible threat to another’s physical safety, reasoning from the historical tradition of disarming dangerous individuals.
Definition is not the same as a case outcome
The narrow definition-and-history question differs from a full guide to the right to bear arms. A present dispute requires the current statute, the regulated conduct, the person and weapon involved, the relevant jurisdiction, and controlling precedent.
Federal doctrine establishes a constitutional floor, while federal, state, and local firearm laws operate within different spheres. A federal opinion does not establish the text of a particular state’s gun law or constitution.
Historical sources must also be used carefully. Founding-era sources illuminate meaning, but modern doctrinal holdings come from the courts, and later statutes cannot rewrite the constitutional text.
Frequently asked questions
When was the Second Amendment ratified?
December 15, 1791, when Virginia’s approval brought ten proposed amendments to the constitutional threshold.
Was the Second Amendment originally Article Four?
Yes. Congress proposed twelve articles in 1789. Because the first two were not ratified in 1791, proposed Article Four became Amendment Two.
Does “well regulated” mean modern firearm regulation?
The phrase historically described the militia, and its eighteenth-century usage cannot be equated mechanically with every modern regulation. Current constitutional analysis follows Supreme Court precedent applying text, history, and tradition.
Sources
- Constitution Annotated: Second Amendment text
- Constitution Annotated: Historical Background
- Constitution Annotated: Modern Doctrine Overview
- National Archives: How the Bill of Rights Happened
- National Archives: Bill of Rights proposal and ratification
- Supreme Court: New York State Rifle & Pistol Association v. Bruen
- Supreme Court: United States v. Rahimi
