I'm less worried about science in particular and more about politicians, CEOs, and other authorities. And society in general, for that matter; a lot of the impr

I'm less worried about science in particular and more about politicians, CEOs, and other authorities. And society in general, for that matter; a lot of the improvements that African-Americans, for example, have seen in the last 100 years have been down to the old bigots being displaced by more tolerant young people. Basically, whatever prejudices are popular when life extension becomes commonplace are going to be fixed permanently. And of course overpopulation becomes a huge issue if it's widely available. People seem to have a real thing about having kids, and even with dramatically advanced space travel it's just not possible to transport people offworld fast enough to make a dent in the population. We either wind up with crippling overpopulation or draconian birth control. > I think that's a problem we can tackle with other methods. Such as?