There’s an obvious logic to your fundamental argument in favor of a steady-state economy, which is that the economy, like everything else on the planet, is subject to physical limitations and the laws of thermodynamics and as such can’t be expected to grow forever. ...

That's right, like the law of thermodynamics. That's the law that perpetual motion machines violate. So this just hit us, "Hey, you know a continuously growing economy...Einstein would not approve."?