But that's their very point: birth rates can't go down forever. The productivity gains of declining birth rates (which themselves are a product of scientific ad

But that's their very point: birth rates can't go down forever. The productivity gains of declining birth rates (which themselves are a product of scientific advancement and productivity gains leading to greater health and quality of life) might also be a relatively short-lived phenomenon. What if the population replacement rate starts to stabilize around 0? it's already happening in some places, and there are arguments to be made that is a desirable outcome.