Why do people resort to plastic surgery to look young? Why are stepchildren at greatest risk of fatal abuse? Why do we prefer gossip to algebra? Why must Dogon wives live alone in a dark hut for five days a month? Why are young children good at learning language but not sharing? Over the past decade, psychologists and behavioral ecologists have been finding answers to such seemingly unrelated questions by applying an evolutionary perspective to the study of human behavior and psychology. Human Evolutionary Psychology is a comprehensive, balanced, and readable introduction to this...

What a big brain we have for all the small talk we make. It's an evolutionary riddle that at long last makes sense in this intriguing book about what gossip has done for our talkative species. Psychologist Robin Dunbar looks at gossip as an instrument of social order and cohesion--much like the endless grooming with which our primate cousins tend to their social relationships.

Apes and monkeys, humanity's closest kin, differ from other animals in the intensity of these relationships. All their grooming is not so much about hygiene as it is about cementing bonds, making friends, and...