As the biological machine of our human bodies die, the forces of the universe that comprise it do not. Of these forces, the primary is conscious awareness. At death they separate. Consciousness as an eternal force cannot die, just like electricity and atoms, thus you "experience" death. And a birth. Again and again until you consciously change that path through understanding how it works in one of your infinite repeating lifetimes. The specific lives lived only mattered to the observer while they were alive within that body. In a sense, the only thing that matters is the infinite Now. This lifetime, and the understanding of it. And the ending of cyclic existence.