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Dr. Christopher Ryan is 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\xa0(translated into 15 languages), alongside his partner-in-crime (and wife), Cacilda Jeth\xe1, MD.\xa0Drawing upon his multi-cultural experience, Chris' research focused on distinguishing the human from the cultural, first by focusing on shamanism and ethnobotony\u2014studying how various societies interact with altered states of consciousness and the sacred plants that provoke them\u2014and later, by looking at similarly diverse cultural perspectives on sexuality. His doctoral dissertation was a multi-disciplinary investigation of prehistoric human sexual behavior,\xa0guided by the world-renowned psychologist, Stanley Krippner, at Saybrook Graduate School, in San Francisco, CA.\nChris is finishing a new book for Simon and Schuster tentatively called Civilized to Death: Why Everything's Amazing but Nobody's Happy, \u2014and he puts out a weekly podcast, called Tangentially Speaking, featuring conversations with interesting people, ranging from famous comics to bank robbers to drug smugglers to porn stars to authors to plasma physicists. Visit\xa0https://chrisryanphd.com\xa0for more.