In his victory speech, President-elect Obama singled out Ann Nixon Cooper. At 106 years old, she has borne witness to tectonic shifts in her society. Few of us would hesitate at a chance to live such a remarkably extended life. We can hardly imagine what our world will be like in forty, sixty, eighty years, but we’re certain it would be worth staying around to see. Today on Public Ethics Radio, we take a close look at that unhesitating certainty. What would a world in which everyone lived beyond 100 be like? Would it really be worth it for us?