Sex at Dawn: The Prehistoric Origins of Modern Sexuality
Christopher Ryan, Ph.D. & Cacilda Jethá, M.D.
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Christopher Ryan, Ph.D.
Christopher received a BA in English and American literature in 1984 and an MA and Ph.D. in psychology from
Saybrook University, in San Francisco, CA twenty years later. He spent the intervening decades traveling around the world, living in unexpected places working at very odd jobs (e.g., gutting salmon in Alaska, teaching English to prostitutes in Bangkok and self-defense to land-reform activists in Mexico, managing commercial real-estate in New York’s Diamond District, helping Spanish physicians publish their research). Somewhere along the way, he decided to pursue doctoral studies in psychology. Drawing upon his multi-cultural experience, Christopher’s research focused on trying to distinguish the human from the cultural. His doctoral dissertation analyzes the prehistoric roots of human sexuality, and was guided by the world-renowned psychologist, Stanley Krippner.

Christopher has lectured at the University of Barcelona Medical School, consulted at various hospitals, contributed to publications ranging from
Behavioral and Brain Sciences (Cambridge University Press) to a textbook used in medical schools and teaching hospitals throughout Spain and Latin America. He’s been featured in major national media, both conventional (e.g., MSNBC, Canada’s CBC-TV, Oprah Radio, CNN, NPR, The Washington Post, Time, Newsweek, The Atlantic, Outside magazine) and Internet-based (e.g., Salon.com, Seed.com, Big Think, and Andrew Sullivan’s Daily Dish blog over a dozen times). He and his work have also appeared in many international newspapers (e.g., The Times of London, Toronto Globe and Mail, Israel’s Ha’aretz, The Sydney Morning Herald, SonntagsBlick) and television (U.S., Spain, Russia, Canada, Australia).

Christopher contributes to both
Psychology Today and Huffington Post.