Whether the Second Amendment protects an individual right to keep and bear arms unconnected with service in an organized militia.
Holding
Yes. The Second Amendment protects an individual right to possess and carry weapons for lawful purposes, including self-defense, rather than only a right exercised through militia service.
Reasoning
The Court treated the Amendment's operative clause—"the right of the people to keep and bear Arms, shall not be infringed"—as the starting point. In the First, Fourth, and Ninth Amendments, references to a "right of the people" denote individual rights. The phrase therefore strongly indicates that the Second Amendment secures a right held by individual members of the political community, not merely a right held by a state-controlled institution.
The ordinary founding-era meanings of the operative terms supported that conclusion. To "keep Arms" meant to possess weapons, while to "bear Arms" meant to carry weapons for possible offensive or defensive confrontation. Although "bear arms" could sometimes be used in a military sense, the Court concluded that it was not limited to formal service in an organized militia.
Historical sources reinforced the textual reading. The English Bill of Rights, adopted after the Stuart monarchs disarmed political opponents, was understood to protect an individual right to possess arms for defense. Founding-era state constitutional provisions, early treatises, and nineteenth-century cases likewise commonly described arms-bearing as a right of personal defense.
The prefatory militia clause announces a purpose but does not restrict an otherwise clear operative guarantee. At the founding, the militia consisted broadly of able-bodied citizens. Protecting citizens' possession of arms helped preserve an effective citizen militia and guarded against a government that might disarm the people while relying on a standing army or select militia. Thus, the individual-right reading fit rather than contradicted the militia-related purpose.