Just follow the numbers.. muslims have around 3 kids, then u have the orthodox jews with ~7, Amish with maybe ~5, central asian countries like kyrgyzstan with still around 3, the "quiverfull" hardcore christians, and i guess mormons have above 2,1 as well. Those are the ones who will rule the future. The west has been dead since the late 60s. Thats over 50 years, over 2 generations. (1 gen is 25 years)
Heck, even the gypsys, by the numbers, will have more than 2,1 kids probably. And all the countryside people of the world who probably have 2,1 2,2+ kids compared to the city people. Its the normie middle class morons who are dying out.