[central_va]

Most third world countries have an average IQ < 90. That is the core problem.

[Harmless Teddy Bear]

I read that book too. It is a bunch of baloney pushed by people who did a very poor job doing research.

Funny but when the three things I mentioned show up suddenly the IQ apparently soars. When they vanish the IQ drops. Amazing how that can happen in just few decades.