Earlier quoted context omitted.
Signs point to the 10 billionth (concurrently living) human being never being born, birth rates have begun to stabilize worldwide as more countries modernize. Remember, more educated populations with better health care reproduce less. It’s not an issue of limitless growth of the population, it’s an issue of the population consolidating into a smaller footprint (which from an ecological perspective is a Good Thing) an…
We're already over the carrying capacity if the world wants first world lifestyle.
Cut out meat, suburban lawns, and the cars that go with them, and the earth could support 10B people right now, at the living standards of a typical Millenial in a cosmopolitan metropolis.
Unfortunately, there's pretty good indications that most people on earth want those meats, suburban lawns, and cars, so I think it's more likely we'll get war instead. But it's totally doable, at a standard of living that people will grumble at but could abide.