One in three Americans knows someone who has been shot. As long as a candid discussion of guns is impossible, unfettered debate about the causes of violence is unimaginable. Gun-control advocates say the answer to gun violence is fewer guns. Gun-rights advocates say that the answer is more guns: things would have gone better, they suggest, if the faculty at Columbine, Virginia Tech, and Chardon High School had been armed. That is the logic of the concealed-carry movement; that is how armed citizens have come to be patrolling the streets. That is not how civilians live. When carrying a concealed weapon for self-defense is understood not as a failure of civil society, to be mourned, but as an act of citizenship, to be vaunted, there is little civilian life left.