I have neither the "Malthusian or environmentalist worldview" nor the opposite, which seems to be dangerously close to a "nationalist or eugenics worldview". In

I have neither the "Malthusian or environmentalist worldview" nor the opposite, which seems to be dangerously close to a "nationalist or eugenics worldview". In other words: any grievances about birth rate on a population-wide level run the risk of spurning legislation or other changes with the purpose of forcing (with varying level of vehemence) individuals to make reproductive choices they otherwise wouldn't. Specifically, it's hard to interpret the universal drop in birth rates among societies as they advance on anything but women exercising their newfound freedom not to have children. Many attempts to reverse the trend will thus look to reverse these changes. To be sure, there are other policy ideas one could advance, and some examples of them working well, such as universal childcare, mandatory parental leave for both genders, and some others that share the distinction of having zero chance to become law in the US. I'm taking the liberty to advocate for ignoring any population-wide concerns about birth rates because even in the most extreme cases such as Germany or Japan, and even moreso in the US where it's relatively mild, the effect just isn't strong enough to lead to any insurmountable problems. Given a bit more automation and medical advances that keep people not just alive but fit, the problems of an ageing population seem to be solvable, especially as long as there is still significant will to immigrate, which does not seem likely to abate.