Harvard historian Jill Lepore has a piece attacking gun rights in the latest New Yorker, and a follow-up post on the magazine’s website. Most of it is basically what you’d expect: some numbers about gun violence, some horrifying anecdotes about people who’ve misused guns, some reporting from a gun range, some artsy writing (“a gun is a machine made to fire a missile that can bore through fleshâ€), and an overarching history of the gun-rights movement.More irksome, however, is Lepore’s analysis of the Second Amendment’s meaning. By leaving out or misrepresenting key historical details, she shortchanges the idea that...