Eugene Volokh doesn’t think moral objections will provide much of a rampart against neo-eugenics, concluding:
… none of this responds to the ethical, philosophical, or religious objections to genetic modification of intelligence that are driving the high current hostility to such modification. (A response could be made, I think, but it’s not my goal here to offer it.)
My point is simply that competitive pressures, on the international level as well as the individual level, are pretty likely to swamp such objections in practice, at least unless someone shows that the objections are so overwhelmingly compelling that we are willing to risk permanent second-class (fifth-class?) status in order to adhere to them.