Edge.org [5] is a website where really smart people write about subjects that make most people's heads hurt. I check it out whenever I need to feel particularly stupid.

...This year's subject was suggested by the technology historian George Dyson: "What should we be worried about?"

Dyson's premise: "[P]eople tend to worry too much about things that it doesn't do any good to worry about, and not to worry enough about things we should be worrying about." This sounded good to me. My hobbies include worrying, moping and brooding. As I previously have confessed, I spend way too much time obsessing about grizzly bear attacks. ... I figured the Edge.org [5] piece could help me spend my leisure hours more effectively.... I figured wrong. ... First off, some 150 really smart people contributed things to worry about. Their essays ran to 168 printed pages. I got through maybe 50 of them before going catatonic. ...