[pron]

> A little predictive power can go very far.

Yeah, but I don't think intelligent people are better at predicting things (weighted by impact). Again, look at the current US president; or at stock traders.

> It was not charisma that cracked Enigma and built the A-bomb.

No, but arguably neither would have been done when they were done if it weren't for a war that started largely due to charisma.

> But united tribes of many hunter-gatherers can be slaughtered by a handful of machine guns produced by boring industrialized societies.

But it's not high relative intelligence that brought us industrialization. Those same people who were later industrialized had had hundreds of thousands of years of hunting-gathering.