In Sex at Dawn: The Prehistoric Origins of Modern Sexuality renegade researchers Christopher Ryan and Cacilda Jethá debunk almost everything we “think we know” about sex and show how our promiscuous past haunts our current struggles regarding monogamy, sexual orientation, and family dynamics. Weaving together convergent, often overlooked evidence from anthropology, archeology, primatology, anatomy, and psychosexuality, Sex at Dawn shows how far from human nature sexual monogamy really is and unapologetically upends unwarranted assumptions and unfounded conclusions while offering a revolutionary understanding of why we live and love as we do.