Here’s a graph of UN projections showing a peak, then decline. Obviously the possible range is still too much, but

– people fear the red line of unconstrained growth but that no longer seems likely

– I fear the green line of destabilizing shrinkage

– we should tweak family support programs to try to land on yellow, where population starts to decline but slowly enough for society to adjust

Edit: sorry bad url or an image search, so let’s go with Wikipedia, showing a range of predictions with population peak sometime in the second half of this century

https://en.m.wikipedia.org/wiki/World_population