sorry, but blacks have a lower average intelligence than other races. it doesnt matter if it is genetics or culture, it is reality. all any individual can do is make the best with what they were given.
unfortunately in black majority countries that means not much.
Your devil ancestors systematically kept blacks illiterate for 300 years. Despite this fact we were still the ones to pioneer open heart sugery, discover blood plasma, explore the North Pole, and discover the Grand Unified Theorem. How could we have done all this despite your devil ancestors attempts to keep us down if we are of "lower intelligence than other races"?