In a well-functioning democracy, people do not live in echo chambers or filter bubbles; rather, citizens are exposed to myriad ideas and perspectives even if not their own. Constitutional scholar Cass Sunstein suggests that our current obsession with social media and our online friend groups narrow the scope of the kinds of daily and serendipitous interactions that might otherwise broaden our perspectives, nurture our curiosity, and fuel our compassion. What happens to a society in which its citizens fail to listen to one another? Why does it matter?