I have looked but never found any indication that the resources on Earth aren’t effectively unlimited. Water, oil, metals.

Tyrants do a great job of wiping out hundreds of millions every few centuries. There’s a good chance people are being exterminated right now. Natural resources running out should be the last of our worries.

My view is that if one is concerned about overpopulation, maybe stop artificially manipulating the natural order with welfare subsidies that try to overcome the survival of the fittest aspect of nature. The world would be far better off not having to wipe the asses of those who aren’t able to look after themselves, at the expense of those who can.