What started out as an explanation for autistic behaviour has with twelve years of obsessive thought become the basis for a profound shift in thinking about psychology. The author takes the idea that we have been created by evolution and that gives us our psychology. He models this psychology layer on layer right from the start explaining everything from the cause of our fears, to friendship to the autistic and normal personality. This new model provides a twist in the tale. There isn't one normal personality there are two. The autistic personality is one of them the normal personality is the other. "Original and Tribal Minds" is essential reading for anybody that really wants to understand the autistic personality. It is essential reading for anybody interested in seeing psychology in a new light.