Have you ever wondered why most news headlines are dire? Or why almost all news shows lead with tragedies? Or why so much of our idle conversation turns toward the difficult and dour rather than the hopeful and happy? I know I have, and I learned why in the following TedTalk by tech guru Peter Diamandis. We are by nature, he argues, programmed to pay attention to threats. While this made evolutionary sense at an earlier point in history when our species was beset by dangers, today it can cloud our view of the world so that we miss the incredible abundance and potential that surrounds us. Diamandis founded and now runs the X Prize, which...