The Georgia Guidestones told you why, when it said making the population more fit. It did not say make the population better. In context, being more fit can mean more appropriate for their function. In other words, 85-95 IQ as an average.
The globalists are probably being offered the world if they eliminate any possibility of opposition to that control and Europeans, because of their experience in war, are the only people who could stop the globalists.
Yes, the infamous guidestones. It appears the powers that be, aren’t making much of an effort to find the the guy who blew the guidestones up.