I agree with you Carl, humans are the basic problem, by our nature. Kurt Vonnegut humorously called this disaster "the era of big brains " in one of his novels, saying humanity became dangerously clever, surpassing our limited intelligence, driven by evolutionary biology suited for beings with very limited reach. He knew we are intrinsically doomed.
I joke that if the starship Enterprise appeared in orbit, and scanned the earth for intelligent life, they would find none. Just a bunch of short thinking, dangerously clever prideful monkeys playing with fire on a planet killing scale. The next step would probably be to get out the giant can of bug spray…
And Pete is right, though increasing mortality will prevent us from ever seeing 15 billion, though we may see 10 by 2050, which will be the death warrant for the planet.
It’s a shame we can’t learn to live more humbly. I still believe permaculture is the only sustainable path, but agreed it was no paradise either, except in post cards. But it’s closer to what we are really built to do.