>>6
Well, race is not the only factor, but it is the overwhelming one in g-loaded IQ test scores, and changing your IQ is *very* hard and won't happened unless you didn't know how to read, are malnourished and several factors that don't matter. I can look for some studies proving that quite easily, Jensen and Rushton did some lately.
Starting from a 80% nature v. 20% nurture model would be good for now ;-)