One of the most remarkable effects of the Internet is that it permits unlimited specialisation of contacts and information. If you’re looking for an out-of-print book on an esoteric subject, you can find out instantly where there are copies of it in second-hand bookstores from Iceland to Australia, compare prices and conditions, and order it in a few seconds. You can read what people...
Cass Sunstein seems to believe that exposure to unsought information or divergent opinions is for most people like advertising: they can’t avoid it, as the price of getting what they are really after; they read newspapers or magazines or watch television news for their own narrow purposes, and are then shown other things that they would not have included if they had the choice. Most people are not such control freaks, however: they have a general curiosity and desire that not everything in their lives be planned.