When Kanazawa actually correlates measures of intelligence with views of particular issues, he finds that, controlling for various other variables, more intelligent General Social Survey (GSS) respondents are less likely to support government-mandated efforts to ” reduce the differences in income between people with high incomes and those with low incomes.” This is hardly consistent with claims that the more intelligent are more politically liberal in the conventional sense of the term.I suspect that much of the public interest in Kanazawa’s study is driven by a perception that political views endorsed by more intelligent people are more likely to be true. This, however, is a dubious inference. Even intelligent people have incentives to be rationally ignorant about politics and to do a poor job of evaluating the information they do know. I do think that, other things equal, a political view is more likely to be correct if it is more likely to be endorsed by people with greater knowledge of the issue (controlling for other factors that may affect their answers). While knowledge and intelligence are likely to be correlated, they are not the same thing. Ultimately, the fact that a political ideology is more likely to be endorsed by more intelligent people is only a weak indicator of its validity.
III. Are Ideologies Endorsed by More Intelligent People More Likely to Be Correct?
I suspect that much of the public interest in Kanazawa’s study is driven by a perception that political views endorsed by more intelligent people are more likely to be true. This, however, is a dubious inference. Even intelligent people have incentives to be rationally ignorant about politics and to do a poor job of evaluating the information they do know. I do think that, other things equal, a political view is more likely to be correct if it is more likely to be endorsed by people with greater knowledge of the issue (controlling for other factors that may affect their answers). While knowledge and intelligence are likely to be correlated, they are not the same thing. Ultimately, the fact that a political ideology is more likely to be endorsed by more intelligent people is only a weak indicator of its validity.