Why would our judgments, and our emotions, vary in this way? For most of our evolutionary history, human beings – and our primate ancestors – have lived in small groups, in which violence could be inflicted only in an up-close and personal way, by hitting, pushing, strangling, or using a stick or stone as a club.
为什么我们的判断和我们的情感会如此不同呢？在我们进化史的相当一部分，人类—和我们灵长类的祖先—都以小群体聚居。在小群体中，暴力只能通过击打、推搡、掐勒或使用棍棒或石头等近距离个人化的方式引发。