People delay kids mostly because there's other stuff they want to do first (or instead). Travel, succeed in their careers, etc. This is especially true in a hig

People delay kids mostly because there's other stuff they want to do first (or instead). Travel, succeed in their careers, etc. This is especially true in a high-growth economy because early-life career advancement, investment, etc is more valuable because of compounding. In an austere, sustainable lifestyle, there are fewer things to do instead of have kids. The current economy both applies lots of pressure to delay kids and provides lots of alternatives to people on the fence about them. In an entirely re-imagined, sustainable, economy, will the invisible hand keep family sizes down the same way it does in developed nations today? I'm not sure.