I think it's a very firm part of human nature that if you surround yourself with like-minded people, you'll end up thinking more extreme versions of what you thought before.
Cass SunsteinThe 'cash for clunkers' program was a big success in part because it gave people the sense that the economy was moving.
Cass SunsteinA system of limitless individual choices, with respect to communications, is not necessarily in the interest of citizenship and self-government.
Cass Sunstein