The curious modern reluctance to discuss possible links between ethnicity and intellectual ability

Any attempt to explore possible differences in the average intelligence which might exist within and between different ethnic groups is regarded by many people today with abhorrence. It is thought to be the beginning of a slippery slope leading to eugenics. This squeamishness is wholly misplaced. Evans, Patrick D. et al (2005) Microcephalin, a Gene Regulating Brain Size, Continues to Evolve Adaptively in Humans, Science, Volume 309 9/11/2005, pp1717-20. Leakey, Richard E.; Lewin, Roger (1977) Origins: What New Discoveries Reveal About the Emergence of our Species and Its Possible Future, New York: E.P. Dutton.