“Earlier wars, like World Wars I and II or the Franco-Prussian War, were limited by termination, by an ending that occurred before the period of greatest potential violence, by negotiation that brought the threat of pain and privation to bear but often precluded the massive exercise of civilian violence. With nuclear weapons available, the restraint of violence cannot await the outcome of a contest of military strength; restraint, to occur at all, must occur during war itself. This.”