It’s 500 million and from a long term as in century level time scales scientifically they are not wrong. The scientific term is carrying capacity the earth’s long term carrying capacity is around 500 million that’s just cold hard math. Humans will burn trough every liquid technically recoverable hydrocarbon in just under 50 years the numbers are something a 8th grader should be able to do. Coal adds in a century or two much less if 8+ billion try to have western energy consumption rates. There’s no need for drastic black Swan measures just taking the birth ratio to 2 or less for a century world wide would cut the population to the carrying capacity. Western countries already have under 2 for their reproductive ratio that is for every two reproductive partners they have less than two total.children that survive to adulthood. The bare minimum replacement rate is 2.2 the USA has been under 2 for decades, same for Russia, Japan and nearly all of the EU. China just went under 2 with their one child policy working in spades. India and Africa are the ones with 3+ rates and are producing all the useless eaters of the world. Getting them under 2 solves the problem in three or four generations. Most people on this planet will never produce in their lifetimes more benefits for society via productive efforts ,scientific research, or cultural assets than the resources they consume they are by definition unproductive eaters. It’s cold but an absolute fact.
You shouldn’t ramble/babble with run-on blurbs about whatever eccentric horse flop you wanna spew.
Your head is so far up your anus, you can’t even break a paragraph, yet you have the “math” on our extinction. According to you, we were at “peak humanity” ages ago.
You sound like the walkers I’d encounter in NYC years ago.
Back in 1971, we were told that there was only oil for the next 20 years.
We would be out of oil by 1991.
Yet, we still have oil in 2022.
What a miserable life you must lead.
Sitting in the dark calculating how many people must die in order for you to be satisfied.