ABSTRACT
Professor Jensen almost singlehandedly shocked social scientists out of their dogmatic slumbers and forced them to adopt a scientific approach to racial and group IQ differences. Others will detail his positive contribution. Mine is the ungracious task of giving reasons for rejecting one of his conclusions. Speaking of the fifteen-point IQ gap that separates black and white school children in America, Jensen asserts: ‘All the major facts would seem to be comprehended quite well by the hypothesis that something between one-half and three-fourths of the average IQ difference…is attributable to genetic factors.’1 In other words, if the environments of black and white were rendered equivalent, the mean IQ of whites would still be approximately ten points above that of blacks.
