Denver Post columnist David Harsanyi notes that in a new Rasmussen Reports poll, nearly 1 in 2 U.S. voters say the nation's best days are behind it. "How is it possible that so many people believe the next generation will be in worse shape when nearly every positive indicator of the human experience is on a positive trajectory — from our standard of living to our life expectancy to our technology to the health of the environment?" he asks.Another poll finds that "1 in 3 children ages 6 to 11 fears that the Earth will be destroyed by the time they grow up," he says — not surprising after a "steady diet of model-projection Armageddon their whole lives."He concludes: "This next generation almost certainly will live through a few glorious bubbles, followed by a few scary recessions. Yet just as certainly, they will live 'better' lives than we do."