Jason Fung Smith

“To the gene, however, faster aging is irrelevant, because aging and death generally occur long after reproduction. If the animal has offspring, the gene will survive even after the individual animal perishes. Evolution requires constant renewal, and longevity is a deterrent to this goal, so it can be considered somewhat “unnatural.” The gene “rejuvenates” itself by letting an older individual die and renewing itself in that person’s children. Evolution favors constant renewal over longevity.”
― Jason Fung, The Longevity Solution: Rediscovering Centuries-Old Secrets to a Healthy, Long Life