Is More Life Always Better? the New Biology of Aging and the Meaning of Life‪.‬

The social consequences of extending the human life span might be quite bad; perhaps the worst outcome is that power could be concentrated into ever fewer hands, as those who wield it gave way more slowly to death and disease. But the worry that more life would damage individuals' quality of life is not persuasive. Depending on what the science of aging makes possible, and on how people plan their lives, longer life might even facilitate a richer and deeper life. He had passed that great meridian, the age of forty, when for every man the process of spiritual evolution stops, and he goes on thenceforward working out to the end a character that has become fixed and unalterable."--G. Baker, in Tiberius Caesar