I think it's rational if a bit cold. Subreplacement level fertility is bound to bound to bite you. We don't know of any way to turn subreplacement country (fer

I think it's rational if a bit cold. Subreplacement level fertility is bound to bound to bite you. We don't know of any way to turn subreplacement country (fertility rate < 2.1) into a above replacement country (fertility rate >= 2.1). Just how to mitigate it (immigration). Eventually pools of high fertility will run dry. Some think that it depends on replacing individualism with some form of collectivism. Some think it's related to hope for future. It's very hard to do any comparison.