I almost wish I’d read the summing up chapter of Republic.com rather than the whole thing. On the other hand, the benefit to be derived from exposing oneself to alternate viewpoints is what the book is about, and I wouldn’t have wanted to read it if I hadn’t been interested in the topic.
The idea is that technology increasingly allows us to filter the news we hear; thus we are in danger of losing touch with (or, worse, becoming polarized from) our fellow citizens and the very government we ought to be creating in conjunction with them. The book is a call for increased awareness of the potential problem but also for individual and private action to combat the tendency towards excessive filtering… and also for top-down policy change (regulation) coming from the government itself, if necessary.
See below for more on what I thought.