i.e. "But what if I turn by brain off and assume everything?"
Race Realism as an explanation for society has been proven wrong already, and anyone reading this would do well to note that I added terms and conditions here, it's just en vogue among some now because the disproof of it happened during an ill-studied piece of American history, that being the interim between the Civil War and WWI where the modern welfare state didn't exist. Furthermore, you can get a disproof of it not from African-Americans, but the Scots-Irish in Appalachia who followed a similar rapid gain in intelligence seemingly out of nowhere, indicating that if we're boiling things down to achievement, ascribing it all to race is just plain not correct. Assuming it was correct, China would be the superior state of existence (They're not.), there wouldn't be a litany of Scottish inventors and geniuses (There were.) and things like the massive diversion of Cubans between mainland and refugee wouldn't all be notable. (Even though they are.)
I will give them credit insofar as blank slate theory is objectively incorrect. But that just means 100% nurture is false. I'd sooner plant my flag on, "We know there's nature, and we know there's nurture, and that's genuinely about all we know." The Rat Utopia experiment is one easy explanation for this, given if you give a bunch of rats everything they need to survive comfortably and no outlet for anything, you get a bunch of "beautiful ones" who spend all day grooming themselves and all the other rates fuck, kill, and make life miserable for each other. Sounds like an inner city ghetto where welfare keeps the niggas fed and ambitions nil.
Welfare state dies tomorrow, you'd see a bunch of infighting for a decade as people figure out the new pecking order, but what will result is a vastly different culture and society simply because the biggest tamp on achievement just got nuked.