In our discussions of the Stand Your Ground principle, bogeymen and shadows predominate. We hear much of the National Rifle Association, of the conservative nonprofit “ALEC,” of “the South,” and, particularly ludicrously, of “white supremacy.” Disinformation and hyperbole, too, are rife. To take the more extravagant of the rule’s critics at face value would be to conclude that permissive self-defense regimes are recent inventions — a hijacking of the justice system by would-be vigilantes and their enablers. But all of this is rather silly. In truth, the Stand Your Ground principle, which holds only that one may fight back...