The Essential DifferenceThe Essential Difference is a 2003 book by Professor Simon Baron-Cohen, a psychologist at Cambridge University, which I read when it was first published. I took it to be a particular statement of what I call the market model of human personality . I aimed to make my summary of the work reasonably objective, while somewhat emphasising points of particular interest to this site. Comment from the perspective of this site I offered on companion pages. Baron-Cohen pages on this site: The Essential Difference | Summary | Comments | Classism | Five Brain Types |