Sex - just what is it all about? Don't other species just get on with it? What are the conflicts and jealousy, pain and disappointments, really all about? The 2010 book SEX AT DAWN tells us that this modern misery is due to our belief in a false evolutionary story about human pair-bonding and nuclear family units. Christopher Ryan and Cacilda Jethá claim that their evidence shows that before 10,000 years ago sexual constraints did not exist, paternity was not an issue, and men and women engaged in fairly free and casual bonobo-like sexual activity. Our ancestors, they argue, not only shared food, they shared sex. Are they right? Using predominantly the same sources, SEX AT DUSK takes another look at that evidence, fills in many gaps, makes many corrections, and reveals something far less candy-coated. Bringing together evolutionary biology, primatology, anthropology, and human sexuality, SEX AT DUSK shows that, rather than revealing important facts about our sexual evolution, Sex at Dawn shrouds it in a fog of misinformation and faulty logic that can only lead us further into the dark.