Liberals and atheists have higher IQs, according to a new study.
Evolutionary psychologist Satoshi Kanazawa at the the London School of Economics and Political Science correlated data on these behaviors with IQ from a large national U.S. sample and found that, on average, people who identified as liberal and atheist had higher IQs.... Participants who said they were atheists had an average IQ of 103 in adolescence, while adults who said they were religious averaged 97, the study found. Atheism "allows someone to move forward and speculate on life without any concern for the dogmatic structure of a religion," Bailey said... The study found that young adults who said they were "very conservative" had an average adolescent IQ of 95, whereas those who said they were "very liberal" averaged 106.
Sadly for me researchers also found one other trait—but only in males—is linked to higher IQs: sexual exclusivity.
Kanazawa did not find that higher or lower intelligence predicted sexual exclusivity in women. This makes sense, because having one partner has always been advantageous to women, even thousands of years ago, meaning exclusivity is not a "new" preference. For men, on the other hand, sexual exclusivity goes against the grain evolutionarily. With a goal of spreading genes, early men had multiple mates.
But smarter guys, against-the-grain types, have just one. Because monogamy goes against the grain for men. Or it did. I would argue that honest non-monogamy is against-the-grainier these days than sexual exclusivity or, failing that (as so many monogamous folks do), maintaining the appearance of sexual exclusivity.