What if Facebook Gave Us an Opposing-Viewpoints Button?

With more information than ever at our fingertips, why has it become harder to fathom your neighbor’s point of view? Facebook contributes to an online echo chamber—but could also be part of a solution.

Imagine if you could flip a switch on Facebook, and turn all the conservative viewpoints that you see liberal, or vice versa. You’d realize your news might look nothing like your neighbor’s.

See for yourself: Using data from Facebook, The Wall Street Journal made an online tool that lets you explore two live streams of posts...