Here's a very interesting article on The Darwin Awards website, Stupidity should be cured — Watson.

The best bit from the stupidity story:

"If you really are stupid, I would call that a disease," he was quoted by The Times of London as saying. "The lower 10 percent who really have difficulty, even in elementary school, what's the cause of it?

"A lot of people would like to say, 'Well, poverty, things like that.' It probably isn't. So I'd like to get rid of that, to help the lower 10 percent."