One of the arguments that authoritarian governments use to ward off the call for greater political freedom is to argue that American-style democracy is no guarantee of good policy.... Over the years, I’ve grown used to these arguments, and my response has rarely wavered: Sure, we might make dumb choices sometimes, but we will defend, to the end, the right to make choices at all, because we believe that our collective conscience, freely expressed, will eventually lead us in the right direction. When it comes to guns, it is getting harder to muster that argument abroad. Every new shooting, every new failure of will and citizenship, slashes another hole in our credibility as a way of life.