https://en.wikipedia.org/wiki/Second_Amendment_to_the_United_States_Constitution
Joseph Story articulated in his influential
Commentaries on the Constitution[131] the orthodox view of the Second Amendment, which he viewed as the amendment's clear meaning:
The right of the citizens to keep and bear arms has justly been considered, as the palladium of the liberties of a republic; since it offers a strong moral check against the usurpations and arbitrary power of rulers; and it will generally, even if these are successful in the first instance, enable the people to resist and triumph over them. And yet, though this truth would seem so clear, and the importance of a well-regulated militia would seem so undeniable, it cannot be disguised, that among the American people there is a growing indifference to any system of militia discipline, and a strong disposition, from a sense of its burdens, to be rid of all regulations. How it is practicable to keep the people duly armed without some organization, it is difficult to see. There is certainly no small danger, that indifference may lead to disgust, and disgust to contempt; and thus gradually undermine all the protection intended by this clause of our National Bill of Rights.
[132][133]
Story describes a militia as the "natural defence of a free country," both against foreign foes, domestic revolts and usurpation by rulers. The book regards the militia as a "moral check" against both usurpation and the arbitrary use of power, while expressing distress at the growing indifference of the American people to maintaining such an organized militia, which could lead to the undermining of the protection of the Second Amendment.
[133]