How Facebook warps our worlds

I enjoy my homogenous Facebook feed, full of people who share my views and my life circumstances, just as much as the next guy.

But I also sometimes enjoy reading posts I disagree with, and posts from people who aren't part of my "tribe". If Facebook had a knob that could amplify the stuff it thinks I won’t like (less Bernie Sanders, more conservative talk radio! less wedding pictures, more farmville invites!), I’d turn it once in a while, just to go on a little social vacation.