Sam Harris speaks with Martie Haselton about sex and gender, the role of hormones in human psychology, “Darwinian feminism,” the unique hormonal experience of women, transgenderism, the Google Memo, and other topics. Martie Haselton is an interdisciplinary evolutionary scientist and Professor of Psychology at UCLA. She is the author of Hormonal: The Hidden Intelligence of Hormones – How They Drive Desire, Shape Relationships, Influence Our Choices, and Make Us Wiser. Twitter: @haselton