" Far from being irreplaceable, we should be replaced. Fantasies of staying the hand of mortality are incompatible with the best interests of our species and the continuity of humankind's progress. More directly, they are incompatible with the best interests of our very own children. Tennyson says it clearly: "Old men must die; or the world would grow moldy, would only breed the past again. "
― Sherwin B. Nuland , How We Die: Reflections of Life's Final Chapter