“they at the same time initiate programs that Thwart Darwin at every turn”
The thing about Darwin is that, so far as this particular theory goes, he can’t be thwarted, sort of by definition. Despite the popular understanding, fitness does not refer to strength, intelligence, cunning, or what-have-you. “Fittest” does not mean best. Whoever survives is “fittest”.
Therefore, if liberals were somehow able to overturn human nature (for argument’s sake), and allowed only stupid, ugly, weak, lazy, insane dupes with stumps for hands to reproduce, Darwin would still be in force. For whoever passes their genes along, by whatever means, are the fittest. In this case, ugly, stupid, crazy sloths are fit.