 He also argued in print that continued school segregation was desirable because of the genetic intellectual inferiority of Africans.In an article in the pages of the "National Review", one given pride of place on the magazine's front cover, Van den Haag dismissed recent research debunking innate ethnic differences in intelligence, and stated that he himself believed such differences to exist and to account for "much" of the poorer academic performance of black students, and that such differences necessitated separate schooling.This article in fact caused quite a shock among the readers of the "National Review", several of whom wrote angry letters against the decision to print such "bigotry."