Courtesy Reuters

Ever since there have been organized societies-whether tribes, city-states, nation-states or empires-there has been war among them. Indeed, the conduct of war, if only for defense, was what brought such societies into existence to begin with, and until recently it has remained one of their principal functions. Until our own times, therefore, such societies have felt no compunctions in principle about the open resort, with due formality, to organized physical violence against one another. Now, however, as the twentieth century approaches its last quarter, a combination of developments raises questions about the future of this traditional activity, not excluding the

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