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Christopher Ryan

Christopher Ryan, Ph.D. is a psychologist, teacher, and author. Together with Cacilda Jethá, M.D., he is a co-author of Sex at Dawn: The Prehistoric Origins of Modern Sexuality (to be published by HarperCollins in 2010). They live together in Barcelona, Spain.
His PT blog is Sex at Dawn.
Current Issue
Heartbreak and Home Runs: The Power of First Experiences
How early life experiences shape our character.


