It is simply indifferent. Readers turn to SF, primarily as a means of escape from the problems of the mundane world. We should do more than enjoy their stories. We should listen to what they are saying. Your bolts and bars are strong, but I always sleep with steel by my side.
Civilisation is unatural.
It is a whim of circumstance. And barbarism must ultimately triumph. Barbarism is the natural state of mankind. There is a coherent plan in the universe, though I don't know what it's a plan for. The mind boggles.