I've been under the belief for a long time that our planet is foolproof for the existence of humans, and that almost stems just from from existentialist speculation and an esoteric view on how our existence manifests.

But just things like how the Earth's crust is constantly renewing itself with new resources fresh out of the mantle, to me suggest that our planet is in a continuum, and pushing the envelope in one direction will cause a resistance which balances it out, I don't know.