I've reached the point where I hardly care whether I live or die. The world will keep on turning without me, I can't do anything to change events anyway.
No silver saints, by dying misers giv'n, Here brib'd the rage of ill-requited heav'n; But such plain roofs as Piety could raise, And only vocal with the Maker's praise.
Not everyone wants to live forever, but every culture has always desired immortality in one way or another. Humans have always believed in the possibility of another life, of a second act. We've also always hoped that there might be a way to avoid dying. The term "cultural-universal" is a complicated one, but I've heard it come up on numerous occasions while researching immortality.