It is not waiting. We are actively building it. Of course, we can be hit by a big asteroid, or the planet sterilized by a nearby supernova or some other totall

It is not waiting. We are actively building it. Of course, we can be hit by a big asteroid, or the planet sterilized by a nearby supernova or some other totally unexpected events out of our control, but we keep turning our present reality something unsustainable in many ways. We should not be surprised if we hit the barrier we built in front of us.