Laura Carstensen , Professor of Psychology and the Fairleigh S. Dickinson Jr. Professor in Public Policy at Stanford University, talks about the positivity factor: How older people enjoy enhanced well-being in their later years. She believes that longer lives can and will improve quality of life at all ages.
The video is very inspirational and has great graphs and other visual aids.
See the video here (11:53): "TEDxWomen - Laura Carstensen" http://youtu.be/im0F91tUiek
Have a great day!