I don`t think prolonging life is the goal of most. (Just look at the unhealthy things we like to do - smoking, drinking, overeating.... mmm.... Timbits...) Rather, I think it is making life easier. Many of us are stuck in our routines, working to make life easy for ourselves, and we are relucent to take risks to help others. We might take risks (start up business, lottery, etc), but the goal of these risks is to be successful or make money in order to create a better life for ourselves or those we support. Fewer are those who work hard to make life better for others without receiving money in return.