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What Is Xenophobia? Does the Fear of Foreigners ("Stranger Danger") Have a Genetic Basis?
There is evidence that xenophobia, the fear of people we would now call "foreigners" and other strangers who don’t look like us has an evolutionary history. In Palaeolithic times, our hominid ancestors, living in large groups for survival purposes, perceived strangers as threatening. They probably were. Research findings indicate modern humans appear to have retained this inclination of distrust and fear. The evidence points to a biologically-based propensity in all humans to discriminate against those “not like us” by virtue of everything from skin color to sexual orientation to religion. However, as discussed earlier, humans have the ability to override such instincts, and most of us do, at least some of the time.
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