There is one, and only one, form of gun control that has been shown to reduce murders: anything that reduces the number of handguns in general circulation. Handguns matter most because they account for at least two-thirds of gun-related murders and about half of all murders. No other affluent nation has anything approaching the level of lethal violence as does the United States. That is the case, quite simply, because other nations rigorously restrict handgun possession. Most so-called commonsense measures that U.S. politicians, and the gun control movement itself, promote have not been shown to reduce lethal violence. Moreover, the regulatory model that both gun rights advocates and gun control advocates support – denying guns to the untrustworthy while allowing the trustworthy to possess them – is patently unworkable. It is, and will always be, impossible to effectively differentiate between the two groups. That is the hard, simple truth about gun control.