We've already touched ~all of the arable and non-arable land that's near to where people want to live. Forests clearcut, swamps (and deltas and the Netherlands) drained, rivers rerouted, reservoirs established, plains tilled, roads built, mountains conquered: We've been shaping and expanding the habitable Earth as it suits us for a very long time.

We're humans. We do that stuff.

And we're natural creatures like the rest of them are.