Though I don’t agree with the argument, one could argue that richer people are more likely to be intelligent. And richer people today are undoubtedly having fewer kids. So one could draw the conclusion that natural selection on intelligence is dying.
On Monday night, I had dinner with friends Andy Choy and Fabrice Grinda and we got into a long discussion on natural selection, population trends, etc. Another interesting point: the more religious you are, the more likely you will have a bigger family. So one could say that the country is becoming more religious but more likely is that those who are more religious are contributing to a larger part of the new population.