但通过检测那些从考古遗址发掘出来的骨骼，我们发现有15%的史前人类是死于他人的暴力打击之下的（相比之下在20世纪上半叶，两次世界大战在欧洲导致的死亡率还不足3 % 。
But examination of skeletons found at archaeological sites suggests that as many as 15% of prehistoric humans met a violent death at the hands of another person. (For comparison, in the first half of the twentieth century, the two world wars caused a death rate in Europe of not much more than 3%.)