[botman]

It's worth noting that embryo selection might be coming really soon http://nautil.us/issue/18/genius/super_intelligent-humans-ar... and that will have a much bigger influence on the evolution of human intelligence than any effects related to natural selection.

What worries me much more than dysgenic effects is the fact that people in western countries tend to have a strong aversion to any discussion of genetics and intelligence, which means that these countries may end up being late adopters of embryo selection or genetic engineering technology.