IQ rates are dropping in many developed countries and that doesn't

Are we becoming more STUPID? IQ scores are decreasing

Intelligence quotient - Wikipedia

Average IQ of the European Population by Country (jakubmarian.com) : r/MapPorn

Has the average human IQ changed throughout time? - Quora

Why are there more countries with below average IQ than countries with above average IQ? - Quora

Intelligence, Complexity, and the Failed “Science” of IQ, by Sean McClure

Are IQ scores declining in developed countries? - Enigmatic Horizon

The Average IQ: What It Is and How It's Measured - Brainwonders

IQ, explained in 9 charts - Vox

Does Marijuana Use by Teens Really Cause a Drop in IQ?

American IQ Scores Rapidly Decline: What Is Reverse Flynn Effect?

Norwegian Study: IQ Scores Dropped for Decades