The idiocracy theory was just Mike Judge poking fun with (he is good at that) a phenomenon that is somewhat obvious to those who observe but not so easily explained.
Personally, I would refine it a bit. I used the word darwinism in the colloquial sense, but that’s what modern civilization is eliminating. Yes, I suppose you could argue that with big cities and zooming automobiles, we have our own pitfalls, but sheltered and coddled modern people have no clue what having a bad day used to really mean to human beings.
“...and coddled modern people have no clue what having a bad day used to really mean to human beings.”
Saber Toothed Tigers? ;)