What is known as the reverse Flynn effect, human IQ going down globally, is the biggest issue we face as a species. The sad fact is is that only a small percentage of nations actually make scientific innovations, with the intelligence of these nations lowering we could soon see not just the fall of 1st world nations but the fall of all the poorer nations that rely on them. Science and advancement happen only because a group of people smart enough to do so exists, if suddenly people with an IQ of 120 stopped existing or became extremely rare we as a species are doomed.
What realistically could we do to prevent this?