My friend Guy Molyneux, a progressive pollster, laid out how it could happen. “We need to build a social movement devoted to the simple proposition that owning handguns makes us less safe, not more,” he told me. “The evidence is overwhelming that having a gun in your home increases the risks of suicide, domestic violence and fatal accidents, and yet the number one reason given for gun purchases is ‘personal safety.’ We need a public health campaign on the dangers of gun ownership, similar to the successful efforts against smoking and drunk driving.”

The facts were on the side of those who battled the tobacco companies, and they are just as compelling here. When we talk about guns, we don’t focus enough on the reality, reported in the 2015 Annual Review of Public Health, that nearly two-thirds of the deaths from firearm violence are suicides. Yes, people can try to kill themselves with pills, but there’s no coming back from a gunshot to the head. Those in the throes of depression who have a gun nearby are more likely to act on their darkest impulses.