In political debates, it can be easy to dismiss the other side by turning them into stereotypes or rejecting their viewpoints as “dumb.” Sometimes, though, the rhetoric goes further, and people can accuse the other side of being immoral or even evil. Why is that? In this short video, Kurt Gray, a psychology and neuroscience professor at the University of North Carolina Chapel Hill, digs deep into human history to explain the evolutionary root causes of political polarization.
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