[monomers]

Practically all models estimate peak population to happen somewhen in the second half of the 21. century. And most countries outside of Africa are likely to go the way of Japan far sooner.

[midoridensha]

Japan's birthrate (~1.3) is about the same or only slightly worse than most Western nations. The US is about 1.6.

The one that's really eye-opening is South Korea (~0.8).