Christopher Ryan

Christopher Ryan

Christopher Ryan, Ph.D., is a psychologist, teacher, and author. Together with Cacilda Jethá, M.D., he is a co-author of the New York Times best seller, Sex at Dawn: How We Mate, Why We Stray, and What it Means for Modern Relationships (HarperCollins).

 

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Author of

Sex at Dawn

Exploring the prehistoric underpinnings of contemporary life.