What is wild is comparing the distribution in some of these countries. Try Uganda:
https://www.populationpyramid.net/uganda/2026/
vs Bulgaria:
https://www.populationpyramid.net/bulgaria/2026/
or Japan:
https://www.populationpyramid.net/japan/2026/
... and you see why any remaining expansion in the human population will come from Africa.
Israel is an interesting exception to the rule: https://www.populationpyramid.net/israel/2026/