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The entire world outside of Africa is grappling with sub-replacement fertility rates and an inverted demographic pyramid.
What this practically means for everyone in the next 30 years is that unlike all of history, where you had 3 children supporting two elderly parents, we now have 1 child supporting two elderly parents. That is a 3x drop in labor force or 3x more labor needed for our elderly.
If you don't have kids, God help you in 30 years when everyone else's kid is too busy laboring to help their own parents...
Wow, can you share some studies that led you to that conclusion?