Hmm! Very good read, and worrying for the US (and potentially here).
Asking why has been part of my daily routine for as long as I can remember, hence days lost forever in Wikipedia.
I'm going to say I have to disagree with this throw-away statement though:
One likely culprit is the number of hours kids now spend in front of the TV and playing videogames rather than engaging in creative activities.
TV? Sure, science shows that your brain does less when watching TV than it does when sleeping.
Videogames? Not so much. Even a lot of the seemingly monotonous violent shooters tend to encourage creative problem solving. Medical researches wouldn't be creating game-like representations of unsolved problems if they didn't recognise the kind of thinking that it promotes, and thinker that it attracts.