I just heard about this book; have not read it. In 2004 half of Americans lived in counties with a 20%+ margin between Bush/Kerry. 40 years ago it was only 1/5 of Americans. The show where I heard about this book was talking about how media has become similarly segregated. Apparently people want to be around and listen to like-minded people.
The tag-line for the book says this phenomena is tearing us apart. And I agree, but only because we have moved so much policy to the federal level.
If we moved the bulk of policy decisions to the county level, not only could live among the like-minded, you could live in the type of government you want. There'd be no reason to fight.
