Good NaturedTo observe a dog's guilty look. to witness a gorilla's self sacrifice for a wounded mate, to watch an elephant herd's communal effort on behalf of a stranded calf to catch animals in certain acts is to wonder what moves them. Might there he a code of ethics in the animal kingdom? Must an animal be human to he humane? In this provocative book, a renowned scientist takes on those who have declared ethics uniquely human Making a compelling case for a