I bought this book when it came out (dear God -- 20 years ago?) thinking I might use it in a class I planned to teach; the class got scuttled and I never got around to reading it, but plucked it off a shelf recently out of curiosity. Sunstein makes an excellent and chillingly accurate case for the power the internet has to silo political speech in ideological echo chambers and, in so doing, radically threaten democratic society by striking at it's foundation -- informed conversation among a range of participants. When Sunstein sticks to this he's brilliant and -- not persuasive, exactly, since we have the benefit of hindsight, so let's say visionary; that's even more striking when you remember that he's making his argument in the infancy of social media -- before Facebook, before Twitter, before YouTube, before even MySpace, when internet conversation was largely confined to bulletin boards and Usenet groups.
Where he falls down, however, is in his prescription. It's exactly what you would expect from a technocratic liberal who later worked in the Obama White House (and married Obama National Security Advisor/Biden USAID Director Samantha Powell): an overly optimistic faith in good speech driving out bad, coupled with naïve calls for regulations reminiscent of those the FCC applied to broadcasting in the pre-Reagan era. It may be very unfair to ding him for this naiveté, given how spot on much of what he is saying is; but we can only read this in the present, and in the present his prescription is so obviously politically impossibly, philosophically dubious, and inadequate to the crisis at hand that it made me want to hurl an otherwise good book across the room in frustration. There's a dire need for a current meditation on these issues by someone this thoughtful; if Sunstein has a Republic.com 2.0 in him, I'd read it.