Imagine that for the last thousand years governments had the ability to send to eternal hell anyone whose body they controlled. How big would hell now be?
Edit: Imagine that it was possible to create a hell ICBM that would strike a large area sending everyone in it to eternal hell. Given this technology, I bet the U.S. and Russia would have numerous launch-on-warning hell ICBMs aimed at each other.
http://www.theatlantic.com/technology/archive/2015/05/immortal-but-damned-to-hell-on-earth/394160/
With such long periods of time in play (if we succeed), the improbable hellish scenarios which might befall us become increasingly probable.
With the probability of death never quite reaching 0, despite advanced science, death might yet be inevitable.
But the same applies also to a hellish life in the meanwhile. And the longer the life, the more likely the survivors will envy the dead. Is there any safety in this universe? What's the best we can do?