So make a point. That I have optimism for my lifetime doesn't mean I'm blind to there being real actual physical limits.

OP is talking like grim meathook future is coming quick (linking food production to petroleum production). I was answering that.

I dunno¹, but solar will probably make energy much cheaper in the coming decades.

1 - Of course, obviously I do know. The answer is just completely irrelevant to the discussion.

wow fascinating read.

If global resources are finite, it would explain the drive to colonize space.