亚当·斯密认为,人与其他动物的一个重要区别是人有交换倾向。他在《国富论》中说到,“我们从未见过甲乙两犬公平审慎地交换骨头。也从未见过一种动物,以姿势或自然呼声,向其他动物示意说:这为我有,那为你有,我愿意以此易彼。”显然,交换的前提是占有。我用此物向你交换彼物,就意味着,我承 Adam Smith believes that one important difference between man and other animals is the tendency of people to exchange. He said in “Wealth of Nations” that “we have never seen a fair and cautious exchange of bones between armies A and B. I have never seen an animal standing or calling for something else to say to other animals, Yes, that is for you, I am willing to be easy. ”Obviously, the premise of exchange is possession. I use this thing to exchange things with you, it means, I promise