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How brothers become strangers, and vice versa

Two remarkable etymological maps show twin forces at work throughout human history.

Image by u/Virble, reproduced with kind permission.
  • These two maps capture the centrifugal and centripetal forces at work throughout human history.
  • See how the Proto-Indo-European word for 'brother' spreads and changes, in both sound and meaning.
  • And how the Proto-Germanic word for 'stranger' now is a familiar fixture of European toponymy.
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