In 1995, when Serbians chained some U.N. personnel in Bosnia to military targets as human shields, the U.S. secretary of state was mystified. Warren Christopher said: “It’s really not part of any reasonable struggle that might be going on there.” Anesthetized by their belief that peaceful reasonableness is natural among nations, statesmen from civilized nations often adjust slowly, if at all, to contrary evidence, which is always abundant.

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