After Trump's remarkable win, can national reconciliation follow?

President-elect Trump has a critical role to play in setting the tone. But perhaps the road to healing starts with a million individual acts. On the eve of Election 2016, the signs of discord were everywhere.

Clinton supporters frantically warned of an American democracy in peril if Donald Trump won. Trump supporters warned against electing “Crooked Hillary,” shouts of “Lock her up!” ringing out at every rally.

Lawn signs were defaced or stolen. Friends were “unfriended.” Couples in “mixed marriages” had to negotiate truces.

And yet Americans are by nature...