It's only a problem if you view it as one. At current resource consumption rich countries would need half or even less of their population to exist sustainably

It's only a problem if you view it as one. At current resource consumption rich countries would need half or even less of their population to exist sustainably (https://en.wikipedia.org/wiki/List_of_countries_by_ecological_footprint https://en.wikipedia.org/wiki/List_of_countries_by_ecologica...). That said earth is beginning to self-correct so we may get there more violently than by the relative peacefulness of birth decline.