If intelligence, whatever is meant by that, was the dominating factor in the emergence of power and social orders, then it ought to be quite trivial to show that this is the case by enumerating powerful people from the last century or so and making the case that they were generally very intelligent.
I don't think this is the case. And if Bostrom and whoever else in his clique actually wanted to empower intelligence, how come they aren't viciously fighting for free school, free food, free shelter, free health care and so on, to make sure that intelligent people, especially kids, do not go to waste?
They'll never give a clear definition of intelligence because if they did their claims could be falsified. Qualifying what "intelligence" can do in a formal sense is actually a very well-studied field called computational complexity theory. Computational complexity theory shows than many many real world problems and processes cannot be solved/simulated much better without an exponential increase in computational power, regardless of the program/"intelligence" used. Singulatarian cultists want you to believe that lower bound complexity classes don't exist, which is mathematically equivalent to telling you that AI can somehow magically make 1+1=3.