More signs of optimism:


"We spend millions of dollars on health studies, and a huge amount of our time, money, and mental effort on eating right and getting exercise. Yet what really kills us is cars: motor-vehicle crashes are the leading cause of death for people aged six to thirty-three. . . . We crash our metal boxes into each other and into walls. . . we ignore the death strips that are our roads and highways. If we rejected cars, we would have to walk, and our exercise problem would be over."

-Jennifer Michael Hecht, The Happiness Myth