"Insanity" is a word we often use incorrectly. We use it to dismiss things we don't like or ideas that make us uncomfortable, and most of the time it's hyperbole. But when it comes to the uniquely American phenomenon of mass shootings, "insanity" is an understatement. It's insane that in American society today people face a non-insignificant risk of being mass-murdered on a random, callous basis - a reality to which we need few reminders. 20 first-graders in Connecticut. 59 concertgoers in Las Vegas. 49 people at a Florida nightclub. 17 kids in an American high school.