Michael Agger in Slate:
Why is the Internet the place where civil discussion goes to die? It must be something in the tubes. Before there even was a mainstream Internet, in 1990, Electronic Frontier Foundation attorney Mike Godwin coined Godwin's Law: “As a Usenet discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches one.” If you put a group of slightly asocial, opinionated people behind usernames, the conversation descends into flame wars and miscellaneous insanity.
Which is why I am so impressed with Ask MetaFilter, a question-and-answer site that grew out of the MetaFilter community in 2003. It's one of the few places on the Internet where you can find sensible, accommodating, actually helpful discussion. For example, last October, the user “Hands of Manos” posed the following query: “How can I be less cynical?” He went on to explain, “I hate most movies, I lost faith in the God I was raised to believe in as a child and I find very little joy in most things now a days” and noted, “My wife is pissed because I'm so negative and doubtful of everything.”
Thoughtful replies were posted immediately, with suggestions ranging from volunteering to banjo playing to avoiding “emotionally toxic” people to reading David McCullough's book on John Adams to looking at a blog that collects examples of how the world is getting better all the time.