Longlisted for the Pen, E. O. Wilson Literary Science Writing Award "Every new book by Frans de Waal is a cause for excitement, and this one is no different. A breath of fresh air in the cramped debate about the differences between men and women. Fascinating, nuanced, and very timely. " -Rutger Bregman, author of Humankind- A Hopeful History In Different, world-renowned primatologist Frans de Waal draws on decades of observation and studies of both human and animal behavior to argue that despite the linkage between gender and biological sex, biology does not automatically support the traditional gender roles in human societies. While humans and other primates do share some behavioral differences, biology offers no justification for existing gender inequalities. Using chimpanzees and bonobos to illustrate this point-two ape relatives that are genetically equally close to humans-de Waal challenges widely held beliefs about masculinity and femininity, and common assumptions about authority, leadership, cooperation, competition, filial bonds, and sexual behavior. Chimpanzees are male-dominated and violent, while bonobos are female-dominated and peaceful. In both species, political power needs to be distinguished from physical dominance. Power is not limited to the males, and both sexes show true leadership capacities.