Why Are People Still Racist? What Science Says About America’s Race Problem

“An us-them mentality is unfortunately a really basic part of our biology,” said Eric Knowles, a psychology professor at New York University who studies prejudice and politics. “There’s a lot of evidence that people have an ingrained even evolved tendency toward people who are in our so-called ‘in group.’” But how we define those groups, and the tendency to draw divisions along racial lines, is social, not biological, he added. “We can draw those lines in a number of ways that society tells us,” he said.

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