Christopher Ryan

Christopher Ryan is an American author and psychologist known for co-writing Sex at Dawn with his wife, Cacilda Jethá.

The book, published in 2010, challenges conventional ideas about human sexuality and monogamy.

Ryan has a Ph.D. in Psychology from Saybrook University and has been a featured speaker at TED conferences.

He hosts a podcast called "Tangentially Speaking" and has written for various publications, including Psychology Today and Huffington Post.

Ryan's work often explores themes of sexuality, relationships, and human nature, drawing on anthropology, psychology, and evolutionary biology to support his unconventional perspectives on human behavior.