“It is rare-actually, probably unprecedented-to find in a single volume discussions of the moral right to sell one’s kidney, of friends who enable an alcoholic’s benders out of a misplaced sense of empathy, of people who hoard animals (the not-at-all apocryphal crazy neighbor who lives with 87 cats), of the psychological motivations of suicide bombers, of the genetics of individualism and collectivism, and of the frequent failings of well-intentioned foreign aid programs. This is that rare, if not unique, volume. It manages the impressive feat of pulling together the best research from psychology, genetics, neuroscience, evolutionary biology, and law on well-meaning but ultimately harmful forms of self-sacrifice. It will forever change the way you look at altruism.”