(Who cares? YOU are going to die, regardless.)
A civilization capable to understand the mechanisms of spacetime would be able to manipulate it and that's mean the very conquest of death to anyone (and anything, including animals and entire cultures, languages, art, etc..) ever lived/existed.
If we learn how to use the mechanisms of quantum entanglement we literally can bring back anything to life again.
If materialism is correct (and I think so) we can be entirely reduced to bits of information. And in quantum and spacetime realm the information is never lost we just have to find a way to scan this information.
I think this will not be accomplished by humans in a direct way. I think it's necessary the birth of artificial intelligence to solve that problem. Humans can't focus on things that matter (this one IMHO) instead the humankind is more concerned about the next fashion of underwear or who have the holiest book.
I have no hopes on humanity anymore I know we are obsolete and mediocre, I just hope our scientific system would be stable enough to bring the first sparkle of AI to existence. When this happen the age of man will be over. I'm watching for the coming of Exascale Computing (2025) and the Human Brain Project (2025) from EU. I think these two marks will be enough to build up a conscious AI. I don't know what will happen to humanity after that... I think we will have the option to merge with the AI...