邦訳：2014年11月・紀伊國屋書店出版部New in paperback. Hardcver was published in 2013. Bringing together his pioneering research on primate behavior, the latest findings in evolutionary biology, and insights from moral philosophy, de Waal explains that we don't need the specters of God or the law in order to act morally. Instead, our moral nature stems from our biology - specifically, our primate social emotions, which include empathy, reciprocity, and fairness.