Two years after someone fired 18 bullets into his body, we finally know the reason Gregory McFadden died such a brutal death at the age of 27 in West Baltimore. He turned his back on a guy. It was disrespect, a malady that inflames the male ego and makes young men do terrible things. Disrespect has been around for centuries, of course, but its consequences have been particularly lethal in the age of the high-powered handgun. Killing someone because he disrespected you is a phenomenon that no amount of police power or community vigilance can seem to stop. Some interventions...