"A lively tour through the impulses that cause many of us to cheat, the book offers especially keen insights into the ways in which we cut corners while still thinking of ourselves as moral people." — Time

Dan Ariely, behavioral economist and New York Times bestselling author of Predictably Irrational and The Upside of Irrationality, returns with a thought-provoking work that challenges our preconceptions about

"Sex at Dawn challenges conventional wisdom about sex in a big way. By examining the prehistoric origins of human sexual behavior the authors are able to expose the fallacies and weaknesses of standard theories proposed by most experts. This is a provocative, entertaining, and pioneering book. I learned a lot from it and recommend it highly." — Andrew Weil, M.D.

"Sex at Dawn irrefutably shows that what is obvious—that