Almost everyone has at least heard the phrase "the wisdom of crowds" by now. The most important part of the idea, and the one most people are not familiar with, are the (fairly severe) limits on its usefulness. I wrote a review of the book for Amazon, and one thing I pointed out is that it was a much better balanced treatment of the subject than I had expected from all the hype about the idea that I had previously read. The hype is already all over the place, and has been for years, there is no need to add to it.