If you have an architecture of control, let's say, where you select in advance everything that's going to affect your life, then you're going to live in a very small world that will have an echo chamber feature... Pandora, which I love, actually feeds into that.

When like-minded people, talking mostly with one another, end up thinking a more extreme version of what they thought before they started to talk... If you put a bunch of rebels in a room and ask them to discuss rebellion, they'll get more extreme.

Cass Sunstein Quotes