Unfortunately, this book gives a reader unfamiliar with EP the impression that the ultimate causes of psychological adaptations actually reside in the "unconscious." The book is full of entertaining cartoons that show characters "thinking" of adaptationist "reasons" for their behaviour. The editors should have shown the difference between proximate and ultimate causes. The "reasons" for psychological mechanisms' existence lay in the mists of evolutionary time. The "reasons" for people's immediate behaviour is that it feels good, tastes good, should be avoided, etc. People don't have evolutionary history locked up in their unconscious somewhere. The book has much other stuff to recommend it, but the commission of such a grievous error--about a science that is under such fire from critics--is unfortuante.