I've argued that many of what philosophers call moral sentiments can be seen in other species. In chimpanzees, gorillas, orangutans and humans, you see examples of sympathy, empathy, reciprocity, a willingness to follow social rules. Dogs are a good example of a species that have and obey social rules; that's why we like them so much, even though they're large carnivores.
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About Frans de Waal
Frans de Waal was a 20th-century Dutch primatologist and ethologist. Franciscus Bernardus Maria de Waal was a Dutch-American primatologist and ethologist. He was the Charles Howard Candler Professor of Primate Behavior in the Department of Psychology at Emory University in Atlanta, Georgia, director of the Living Links Center at the Emory National Primate Research Center, and author of numerous books including Chimpanzee Politics (1982) and Our Inner Ape (2005). Read more on Wikipedia →