I can’t find it right now, but I saw a yearly consumption and living standards chart for what would be universally sustainable for humans, and it was pretty sparse. It involved limiting electricity to four hours a day and cooking hot food something like 10 times/week.

That sounds, quite frankly, insane. We have so much ability to produce carbon free energy, just with our current level of tech, not even getting into things like fusion. With wind, solar and hydro we can provide effectively unlimited power to everyone on Earth, if we're not wasting it all on gigawatt scale data centres that no one needs. And with our recent advances in battery tech - especially sodium batteries, which can be produced with extremely widespread resources - and fusion power as a backstop there's no need for our energy to be linked to CO2.

Same goes for food; feeding everyone isn't actually that hard, we just need to stop seeing food as a profit source. The planet can easily sustain our current population.

Yes, there are some lifestyle changes required. We need to reduce - not eliminate, reduce - our reliance on animal protein. We need to learn to use local produce more in our diets. But these aren't exactly crippling conditions to live under.

But frankly, most of the changes needed for a sustainable world are actually positive for the average person. The things we use need to last longer and be repairable. We already know how to do that. The reason they're not is because it benefits capital holders to sell us crap that falls apart. A world where you buy a coat and keep wearing it for decades sounds pretty damn good to me.