Data from the General Social Survey (GSS) collected in the years 1990-1996 are examined for the relationship between fertility and intelligence as measured by vocabulary. The results show that the relation between fertility and intelligence has been consistently negative for successive birth cohorts from to 1900 to 1979, indicating the presence of…

Maintains that intellectual ability has become a more important determinant of occupational success in recent decades, resulting in increased social class differences. Finds that, contrary to the usual view, class differences have become smaller and current social problems cannot be ascribed to low-ability people in the lower classes. (CFR)