All countries. It just takes a while before the effects kick in.

Exactly, we're all in this together. There is only one Earth and the only way to move forward is to work together and help each other out.

International politics does not need to be a zero sum game, a little bit of mutual assistance can go a long way.

No, India and China are both below replacement rate. Most of South America is. Rates are evening out in sub Saharan Africa as well.

This is a misconception that should be corrected. Fertility rates are falling everywhere, even in places with the current highest rates like sub-Saharan Africa: https://www.afd.fr/en/actualites/dramatic-drop-fertility-acr...