Christopher Ryan

Author of NYTimes best-seller, "Sex at Dawn: The Prehistoric Origins of Modern Sexuality"

After getting his B.A. in literature, Chris rode his melting around the world, like a piece of ice on a hot stove (with apologies to Robert Frost). He spent twenty years in unexpected places, working at very odd jobs ranging from salmon fishing in Alaska to teaching conversational English to prostitutes in Bangkok to managing commercial real-estate in Manhattan’s Diamond District. He settled down long enough to pursue a Ph.D. in research psychology in the U.S. — and then moved to Spain.

Chris' insights into human sexuality appear regularly in publications ranging from Cosmopolitan to scientific journals, and he writes a popular blog for Psychology Today. Together with psychiatrist Cacilda Jethá, M.D., he wrote Sex at Dawn: The Prehistoric Origins of Modern Sexuality which challenges many of the assumptions central to evolutionary psychology. Sex at Dawn was an immediate bestseller in both hardcover and paperback editions, and has won several prestigious awards from professional organizations of sex researchers and therapists. Sex at Dawn is being translated into over a dozen languages worldwide. For more information on the book or its authors, please go to