When we were kids, our country was far less polarized. The U.S. president won the 1980 election won 49 out of 50 states—something unimaginable for any party in this year’s election. My mother was a Democrat and my father was a Republican, yet I never once heard them fight about politics. Before this age of on-demand news catered to our leanings, it used to be that the more someone watched TV the more they would be open to political compromise, so youth saw the adults around them modeling political tolerance.

Yet today is a different story. Youth see the democrats and republicans around them arguing (if the two sides are even speaking at all). Researchers at Brown University and Stanford University found that political polarization in the US has grown rapidly—and even faster than in other countries—in the last 40 years. But it does not have to be this........

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