Satoshi Kanazawa reports in the new Social Psychology Quarterly that the higher an adolescent's IQ, the more likely he or she is to be an atheist and a liberal as an adult. This correlation has been reported before.
What is new in this study is Kanazawa's finding that the higher a male adolescent's IQ, more the likely he is to value sexual exclusivity as an adult. The same is not true of women, who generally favor sexual exclusivity across the IQ board.
What Kanazawa does not note is that these correlations pull against one another in family life. Monogamous men are more likely to invest in their children, and their children, in turn, are more likely to succeed in life. Liberals and atheists, on the other hand, are less likely to have children in the first place. So even if Kanazawa is right that liberalism and atheism are an evolutionary advantage because they open people to new experiences, they seem to also be an evolutionary disadvantage. Monogamous men, on the other hand, seem to reap an evolutionary advantage regardless of ideology, because human babies require so much more investment than the babies of any other species.