显然，移情仅存在于人类社区中，而在某种程度上，智能在包括蛛网膜在内的每个门和秩序中都可以找到。一方面，同理心教师可能需要一个不受影响的群体本能。诸如蜘蛛之类的孤独有机体将没有用。实际上，它往往会流产蜘蛛的生存能力。这将使他意识到渴望生活在自己的猎物中的愿望。因此，所有捕食者，甚至高度发达的哺乳动物，例如猫，都会饿死。
(Empathy, evidently, existed only within the human community, whereas intelligence to some degree could be found throughout every phylum and order including the arachnida. For one thing, the empathic faculty probably required an unimpaired group instinct; a solitary organism, such as a spider, would have no use for it; in fact it would tend to abort a spider's ability to survive. It would make him conscious of the desire to live on the part of his prey. Hence all predators, even highly developed mammals such as cats, would starve.)
