My view is very bleak and it one I have put to others before. We are much closer to achieving AI than interstellar travel. AI systems will become enormously more intelligent, therefore more powerful very quickly after initial invention (aka Singularity). Initially AI systems will (may) be designed to be friendly and not a threat, but they will enable uploading of existing human minds. Many human minds are not friendly (fact). The first person uploaded will realize this (I would) and take steps to ensure that no-other person will ever upload themselves (I would) by destroying the rest of civilization, which they will be able to do very quickly by virtue of how much superior they are in intelligence (do you think you can prevail against someone with an IQ in hundreds of thousands). The first upload will know that if they don't do this as soon as they are uploaded then it is only a matter of time before it happens to them, so it will only take one. Don't worry about morality, when your survival is at stake and you can edit your own programming that will be dispensed with. Loneliness? Again quickly fixed. So very quickly any world that develops intelligent life will be reduced to one, very paranoid, super intelligent individual way before the world becomes interstellar. If the individual does explore the universe they will do it very quietly and in a hidden way and with a view to destroying potential threats not for intellectual stimulation or "we come in peace" stuff. That explains the Fermi paradox and also (by the way) the doomsday argument. I would love to be wrong, but this seems rock solid forecast to me of the human future.

Of course one difficulty of comparing the results between different ethnic groups is that each ethnic group has a different percentage of participation in the examination. In the case of black africans versus pakistanis this could well be the case. In other words even if their capabilities were the same if 80% of Pakistanis take the test versus 50% of black africans, one would expect the results to be worse for the pakistanis.