The rest has come from better sanitation, diet, rising standards of living, more disease prevention. And, of course, it in many cases brings a great deal of misery to people. It keeps them alive too long and so forth. I really can't call it off. There's nothing I can say that is likely to stop it.
Science is always on the verge of great breakthroughs.
We're going to find ways to extend human life, but not inexpensively, so we're going to be backed up against the problem of having a lot of wonderful possibilities, but actually no way of paying for them, or at least no way of providing kind of equitable health care for people. Let's take cancer. Lung cancer is the great killer of men. We really know a lot less about how to change people's smoking behavior than we do about the genetics and physiology of lung cancer. Heart disease is a wonderful example.