The last half century has seen a dramatic expansion in access to primary, secondary, and higher education in many nations around the world. Educational expansion is desirable for a country's economy, beneficial for educated individuals themselves, and is also a strategy for greater social harmony. But has greater access to education reduced or…

Michael Levin argues that data from the study are consistent with a black/white IQ difference that is significantly genetic. Richard Lynn maintains that adoption by middle-class, white families has no effect on intelligence. Waldman, Weinberg, and Scarr respond to these criticisms and support the original conclusions. (SLD)