"Possibly the single greatest risk to human civilization is the rapidly diminishing growth rate. And the facts are out there for anyone to look at. But a lot of people are still stuck with Paul Illick's book Population Bomb, and it's like, uh, that was a long time ago. That is not the case today. And there was a massive notch in demographics last year because the growth rate plummeted, and also this year." - Elon Musk at CodeCon 2021 (September)