An armed society is a polite society.

“An armed society,” Nedivi wrote, quoting the science fiction writer Robert A. Heinlein, “is a polite society. Manners are good when one may have to back up his acts with his life.” It may be a bit odd to think of Israeli society as polite, but when it comes to guns it is, and for just the reason articulated by Heinlein: When everyone has a gun, guns are no longer seen as talismans by weak, frightened, and unstable men seeking a sense of self-validation, but as killing machines that are to be handled with the utmost caution and care. - Tablet Magazine