Excuse me for stating the obvious, but racists are dumb. That’s not just my opinion. It’s the conclusion of a provocative new study published in the journal Psychological Science. Gordon Hodson, a psychologist at Brock University in Ontario, and his colleagues found that children with low intelligence are more likely to grow up to be racist adults. A previous study examining homophobia showed that people who are less adept at abstract reasoning are more likely to be prejudiced against gays.