The Disturbing Return Of Scientific Racism
He and colleagues stated that as recently as 5,800 years ago (a mere heartbeat in evolutionary time), one genetic variant that was linked to the brain, among other things, had emerged and swept through populations as a result of evolution by natural selection. Lahn seemed to imply that the brains of different population groups might have evolved in different directions for the past five millennia, and that the groups with this special genetic difference may in consequence have become more sophisticated than others. Soon after the papers were published, the controversial Canadian psychologist John Philippe Rushton ran IQ tests on hundreds of people to see if the gene variants really did make a difference to intelligence or to brain size in those who possessed them.
Source: www.wired.co.uk