Falling birth rates are now the bigger worry than overpopulation, and the shift looks bad for workers and good for whoever owns the AI and robots.

• Global birth rates have slid to roughly the replacement level, so population decline is becoming the default path rather than a distant risk.
• The old fear of too many mouths to feed has flipped: the shortage now is people, not resources.
• AI and robots are framed as the last major technology humans need to build, which would make much human labor unnecessary.
• The same technology could stretch human lifespans by decades, keeping people alive long past their working years.
• The likely result is wealth piling up with the small group that owns the machines, while ordinary earners lose their main bargaining chip — their labor.

Outlook: Expect the debate to shift from how to feed a crowded planet to who gets paid in a world where machines do the work.