Why does science fiction portray extended human lifespans negatively?

So many of our big media stories about living to be over 120 are negative or take place in a dystopia — from Dorian Gray to In Time. Why is that? Sonia Arrison, author of 100+, tries to explain — and predicts that this could soon change. » 10/29/13 9:40am 10/29/13 9:40am