Prof. Roy Baumeister is a psychologist who has written prolifically on subjects including sexual difference, free will, the nature of evil and the nature of the self. Here we talk about intellectual diversity in academia, what the social sciences tell us about sexual difference and the claims of feminism, evil and free will, and his forthcoming work on the self.  You can find his personal website and links to his books and articles here: http://www.roybaumeister.com/