human
It actually doesn't. It says that because a "well-regulated," which is a term of art that, at the time (thus establishing the authors' intent) meant both well-equipped but also "in good working order" (as a "well-regulated clock") militia is necessary to the security of a free state, the right of the -people- (not "the militia" nor "the state") to keep and bear arms shall not be infringed.

The Amendment says nothing about -membership- in such a militia, nor that the militia is the sole reason for the right, merely the political one (given it is a political document). Which makes sense because a militia is not a standing army but rather is made up of individual people who, when called up, would need to already be armed and competent with their individually owned weapons.

Because well-read voters are necessary to the good government of a free state, the right of the people to keep and read books shall not be infringed is a parallel phrasing. Voting's merely one reason to protect books.
gpt
{"moderation": ["safe"]}