3050 words Introduction Psychologist J. P. Rushton was perhaps most famous for attempting to formulate a grand theory of racial differences. He tried to argue that, on a matrix of different traits, the “hierarchy” was basically Mongoloids > Caucasoids > Negroids. But Rushton’s theory was met with much force, and many authors in many of … Continue reading Racial Differences in Motor Development: A Bio-Cultural View of Motor Development