55:2.8
By the time a world attains the fourth stage of light and life, more than half the mortals leave the planet by translation from among the living. Such diminishment of death continues on and on, but I know of no system whose inhabited worlds, even though long settled in life, are entirely free from natural death as the technique of escape from the bonds of flesh. And until such a high state of planetary evolution is uniformly attained, the morontia-training worlds of the local universe must continue in service as educational and cultural spheres for the evolving morontia progressors. The elimination of death is theoretically possible, but it has not yet occurred according to my observation. Perhaps such a status may be attained during the faraway stretches of the succeeding epochs of the seventh stage of settled planetary life.