[nitrogen]

Consider the sorts of policies someone who wanted to maximise productivity in society would develop if it was found that genetics was a greater influencing factor...

Though I do realize that some people think this way, it strikes me as wholly bizarre. If you can identify a strong genetic component of intelligence, the obvious conclusion to me is to develop genetic therapies to boost the intelligence of the entire population, with the greatest gains to be had among those who would otherwise be on the lower end of the scale.