>>2969211Africa has relevance in this, simply because they are a prime example of genetic demographics.
Different conditions have lead to different approaches in tackling the task of propagating your species.
In short, due to abundance of food and mild climes, an approach of low intelligence/high fertility evolved over time, with great success as i might add. The "lack" of intelligence to put it bluntly, is simply because it was not needed to be successful.
Contrary to that, harsher climes and scarcity of food have called for less offspring with greater specialization, i.e rewarding teamwork, problem solving skills and baseline intelligence (as much as that can be measured). This was due to the enormous amount of energy needed to actually produce offspring.
In modern times, those evolutionary pressures have become irrelevant, it's a race of who can shit out the most babies, thus the low int/high fertility demographic always wins.
Beware, the proles are (literally) outfucking you.