Analogy: If someone on a diet keeps losing weight, they will disappear too. But outside pressures and incentives change, and there's also internal regulation. Y

Analogy: If someone on a diet keeps losing weight, they will disappear too. But outside pressures and incentives change, and there's also internal regulation. Your weight will stabilize sooner or later. I think the same goes for populations. When people become scarce, making more of them will be rewarded in some way or another. I'm not sure the authors believe humanity will celibate itself out of existence. But I'm sure they'll sell more books with "extinction" rather than "stabilization" as a headline.