Have you thought about mass killings when dropping your kids off at school or going to a movie lately? It’s hard not to, given the horrific shootings recently. But do you think of them every time you enter your house? Most mass shootings occur in private spaces, and involve families. Mayors Against Illegal Guns recently issued a report on mass shootings . In all cases where a shooter killed four or more people, 57% involved domestic violence: meaning the shooter killed their intimate partner, and frequently, their children and other family members. What surprised me about this report was not...