Yeah, I don’t want that world.

And more to the point, there is literally no way to make that happen. None. It’s as pointless as suggesting we summon magic fairies to cool the earth.

The totalitarian government required to get humanity to return to the lifestyle you’re suggesting here would itself consume vast amounts of energy and resources.

We can’t go back, and almost none of us even want to. We have to figure this out with the tools we have now.