For native-born Americans, it means reminding ourselves that the stereotypes about immigrants today were said, almost word for word, about the Irish, Italians, and Poles. America wasn’t weakened by the presence of these newcomers; they embraced this nation’s creed, and it was strengthened.

　　So regardless of the station we occupy; we have to try harder; to start with the premise that each of our fellow citizens loves this country just as much as we do; that they value hard work and family like we do; that their children are just as curious and hopeful and worthy of love as our own.

　　None of this is easy. For too many of us, it’s become safer to retreat into our own bubbles, whether in our neighborhoods or college campuses or places of worship or our social media feeds, surrounded by people who look like us and share the same political outlook and never challenge our assumptions. The rise of naked partisanship, increasing economic and regional stratification, the splintering of our media into a channel for every taste – all this makes this great sorting seem natural, even inevitable. And increasingly, we become so secure in our bubbles that we accept only information, whether true or not, that fits our opinions, instead of basing our opinions on the evidence that’s out there.

　　This trend represents a third threat to our democracy. Politics is a battle of ideas; in the course of a healthy debate, we’ll prioritize different goals, and the different means of reaching them. But without some common baseline of facts; without a willingness to admit new information, and concede that your opponent is making a fair point, and that science and reason matter, we’ll keep talking past each other, making common ground and compromise impossible.

　　Isn’t that part of what makes politics so dispiriting? How can elected officials rage about deficits when we propose to spend money on preschool for kids, but not when we’re cutting taxes for corporations? How do we excuse ethical lapses in our own party, but pounce when the other party does the same thing? It’s not just dishonest, this selective sorting of the facts; it’s self-defeating. Because as my mother used to tell me, reality has a way of catching up with you.