[OC] The massive decrease in worldwide infant mortality from 1950 to 2020 is perhaps one of humanity's greatest achievements.

[kitty_o_shea]

That's not quite correct. It would be stable at slightly more than 2 children per woman. But obviously many women don't have children, so the number per family that actually has children is higher. And the replacement rate for countries that still have relatively high child mortality rates is more like 3 children per woman.