“Pathological altruism? Sounds like an oxymoron, but this fascinating book quickly convinces you that altruism can go seriously mad and bad. The great breadth and quality of contributors to this book from psychiatry, psychology, and philosophy – and that’s just the ‘P’s’ – shed light on the dark side of our evolutionary propensity towards altruism, which can be subverted to a wide range of pathologies such as survivor guilt, drug co-dependency, personality disorders, and eating disorders. When within-group altruism is exploited to between-group hostility, it can lead to suicide martyrdom and genocide.”