IQ scores in most of the Western world began reversing sometime from the 90s to early 00s. [1] That link is for the US but similar stuff has also been observed in most of every Western/OECD nation. By contrast they're still rapidly increasing in the 'Global South'. You'd expect this to manifest in reduced test scores and reduced quality of outcomes across a breadth of fields over time paired with the inverse happenin…
In my opinion we just have it too easy nowadays. Too much entertainment, screens and not enough challenges to keep kids thinking they need to be as sharp as they can be.