" reasons that one generation must give way to the next, as made clear in another of the letters Jefferson wrote to the equally venerable John Adams near the end of his life: “There is a ripeness of time for death, regarding others as well as ourselves, when it is reasonable we should drop off, and make room for another growth. When we have lived our generation out, we should not wish to encroach on another. "

― Sherwin B. Nuland , How We Die: Reflections of Life's Final Chapter