It seems to me that eugenics is going to make a comeback, for one specific reason: the more we come to understand the human genome, the more we will be able to isolate those components of it that have to do with intelligence. Very few experts in psychometrics or neuroscience doubt that there is a significant genetic component to intelligence. To the extent that the human species can now control its own evolution, we will move in the direction of being an ever more intelligent species, particularly the kind of mathematical-logical intelligence that is the basis of science and technology.
This means that we will probably have a much smaller human population because it requires so many resources to raise and educate children and young people to a high level. But it will be a uniformly more intelligent population. And that's a good thing.
