Great discussion.
Worrying implications for western society though.<p>If Caplan is right, and the data says he is, the declining birth rate among the wests richest and smartest is a death knell.<p>Also, it would suggest we radically re-evaluate the usefulness of almost all redistribution programs.
If outcomes are almost entirely genetic, we get far more efficient results by getting the rich/smart to have more kids than by trying to uplift the downtrodden.