Take the time to read the entire story linked at the end of this excerpt. As an optimistic believer in the ability of humans to create their own fate, this is one of the most beautiful things I've read.
"Stories about aging have traditionally focused on the need for graceful accommodation. The recommended solution to diminishing vigor and impending death was resignation coupled with an effort to achieve closure in practical affairs and personal relationships. Given that nothing could be done to prevent or retard aging, this focus made sense. Rather than fretting about the inevitable, one could aim for peace of mind.
"Today we face a different situation. While we still lack effective and acceptable means for slowing the aging process, we can identify research directions that might lead to the development of such means in the foreseeable future. “Deathist” stories and ideologies, which counsel passive acceptance, are no longer harmless sources of consolation. They are fatal barriers to urgently needed action.
"Many distinguished technologists and scientists tell us that it will become possible to retard, and eventually to halt and reverse, human senescence. At present, there is little agreement about the time-scale or the specific means, nor is there a consensus that the goal is even achievable in principle. In relation to the fable (where aging is, of course, represented by the dragon), we are therefore at a stage somewhere between that at which the lone sage predicted the dragon’s eventual demise and that at which the iconoclast dragonologists convinced their peers by demonstrating a composite material that was harder than dragon scales.
"The ethical argument that the fable presents is simple: There are obvious and compelling moral reasons for the people in the fable to get rid of the dragon. Our situation with regard to human senescence is closely analogous and ethically isomorphic to the situation of the people in the fable with regard to the dragon. Therefore, we have compelling moral reasons to get rid of human senescence.
"The argument is not in favor or life-span extension per se. Adding extra years of sickness and debility at the end of life would be pointless. The argument is in favor of extending, as far as possible, the human health-span. By slowing or halting the aging process, the healthy human life span would be extended. Individuals would be able to remain healthy, vigorous, and productive at ages at which they would otherwise be dead."
The Fable of the Dragon-Tyrant