Rushton argues that race is a valid biological concept and that racial differences frequently arrange in a continuum across 60 different behavioral and anatomical variables, with Mongoloids (Orientals, East Asians) at one end of the continuum, Negroids (blacks, Africans) at the opposite extreme, and Caucasoids ( Europeans,Middle Easterners) in the middle.

The book was generally received negatively, its methodology and conclusions being criticized by many experts. The aggressive marketing strategy also received a lot of criticism. The book received positive reviews by some researchers, many of whom were personally associated with Rushton and with the Pioneer Fund which funded much of Rushton's research The book has been examined as an example of Pioneer's funding of "scientific racist" research while psychologist Michael Howe has identified the book as part of a movement, begun in the 1990s, to promote a racial agenda in social policy."(Wikipedia)
*Because this promotes racism I will not provide links. Just posting so people can have a glimpse into the mind of how racists think.