This always strikes me as one of those "too busy thinking about whether they can to ask if they should" scenarios. The earth is already packed with billions of

This always strikes me as one of those "too busy thinking about whether they can to ask if they should" scenarios. The earth is already packed with billions of people, most of whom live rather miserable existences. It seems like there are nearly infinite other things we ought to improve before we start trying to keep them along for many extra decades. Reality is that so much research focuses here because the rich and powerful desperately want to defeat death, not because it will be good for humanity in general. On toward the age of the methuselahs, I suppose.