Screw the political correctness. Western civilization is dumber because it has opened the floodgates to dumber people. Dumber people get in and the dumb ones who are already here are mollycoddled and supported by a welfare state -- and in America are soon to get free universal Odumbocare, to boot.
Want to make us smarter? Close those floodgates to new dumb people and stop giving dumb people a free ride. Instead, open the floodgates to smart people and give no one a free ride with an IQ below 110 (at a later date, perhaps to be moved up to 120).
I.Q. and heredity are known to be factual.
What we should be concerned with is the lack of moral clarity and personal responsibility.