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...in bygone years when international relations were less complex, and when it was possible for two countries to quarrel and “fight it out,” like schoolboys, without inflicting any widespread injury upon others, it is wholly different now; for the calamity caused by a modern war is so great that it hardly matters, to the world at large, who, in schoolboy phrase, “began it.” It takes two to make a quarrel; and the two are jointly responsible for the disaster that their quarrel entails upon mankind.