In the western word, today's environment seems to select against IQ -- number of children anti-correlates. This wasn't true 200, 300 years ago. So that's one ex

In the western word, today's environment seems to select against IQ -- number of children anti-correlates. This wasn't true 200, 300 years ago. So that's one example of two environments which value this trait very differently. Sure, one of them is highly unusual... The flores island hobbits are another example, where it seems that humaniods evolved quite dramatically smaller brains. But islands are also unusual, obviously.