They claim one resolution to the Fermi paradox is that civilizations tend to evolve toward a state that resembles nature (non-industrial or non-civilizational, I'm not sure).
So the idea of a highly advanced civilization requiring so little resource extraction, or even being able to entirely synthesize all its resource needs from energy, and manage global resources in a non-destructive way, while letting the natural ecology revert to as close as possible to a pre-civilizational state.
So you see small hubs of super-high-density cities, and vast expanses of "nature". Harder to detect from space that way, thus it could resolve the paradox?
You can see our own time moving that direction with urbanization and re-greening happening simultaneously, population growth falling, and a huge effort to abolish the use of one particular variety of extracted resource.
So the idea of a highly advanced civilization requiring so little resource extraction, or even being able to entirely synthesize all its resource needs from energy, and manage global resources in a non-destructive way, while letting the natural ecology revert to as close as possible to a pre-civilizational state.
So you see small hubs of super-high-density cities, and vast expanses of "nature". Harder to detect from space that way, thus it could resolve the paradox?
You can see our own time moving that direction with urbanization and re-greening happening simultaneously, population growth falling, and a huge effort to abolish the use of one particular variety of extracted resource.