Mankind is a bloodthirsty species. According to Steven Pinker, the academic, for much of history being murdered by a fellow human was the leading cause of death. Civilisation is largely a tale of man’s violent instincts being progressively muffled. A part of this is the steady withdrawal of actual human flesh from the battle zone, with front lines gradually pulled apart by the advent of long-range artillery and air power, and the decline in the public’s tolerance for casualties.
人类是一个嗜血的物种。根据学者史蒂文•平克(Steven Pinker)的说法，在历史的大部分时间里，被同类所杀是人类的头号死因。文明基本上是人的暴力本能被逐渐束缚住的故事。其中一个部分是有血有肉的人持续从战场撤出，前线逐渐被远程武器和空中军事力量拉远，公众对于伤亡的容忍程度也下降了。
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