This. Something that gnaws at the back of my mind is that the survival of our species is contingent on absolutely nothing catastrophic happening to the single

This. Something that gnaws at the back of my mind is that the survival of our species is contingent on absolutely nothing catastrophic happening to the single planet we inhabit. All of our eggs are in one basket, so to speak. Until we have a viable network of colonies offworld, we will continue to have this problem.