By the start of WWII, the Nazis, guided by the best eugenic advice in the world, had unerringly separated the great Germanic civilizations into the wheat and the chaff ---- and by then either forced the chaff into exile or had had them murdered.
And in the seventy five years since, what have these former great civilizations ever produced - besides the cuckoo clock ?
The human ability to accurately predict winners and determine the universally and eternally 'right' answers is very limited.
Be the predictors being yesterday's Himmler or today's hot new geneticist.
For untutored geniuses emerging from the ranks of oppressed minorities are pretty much as common as universities having to baby sit the untalented offspring of first rate geniuses.
What the Nazis had actually exiled or murdered were all the various sorts of Germans who had shown a willingness to stir up the pot, for good or bad.
What was left behind was not just that pot - it was also seventy five million people as inert as that pot.
Luckily their postwar children and grandchildren are all over the map - smart, dumb and everything in between .
Life can resume in the new Germany with the full breath of humanity's wide diversity of beings and so we might once again see world culture and science enriched by contributions from the Germanic lands ...