World-renowned primatologist Frans de Waal draws on decades of observation and studies of both human and animal behavior in his book “Different: Gender Through the Eyes of a Primatologist”. He argues that despite the linkage between gender and biological sex, biology does not automatically support the traditional gender roles in human societies. De Waal challenges widely held beliefs about masculinity and femininity, and common assumptions about authority, leadership, cooperation, competition, filial bonds, and sexual behavior. Frans de Waal will discuss his thought-provoking approach to the long-running debate about the balance between nature and nurture, and where sex and gender roles fit in, on this installment of Leonard Lopate at Large on WBAI 99.5FM