Cruel and brutal behavior that shows a complete lack of compassion or kindness toward other people.
From 'in-' (not) + 'humanity.' First used in the 1600s to describe actions that violate human dignity and compassion.
The phrase 'man's inhumanity to man' became famous through a Robert Burns poem in 1784, and it's still quoted today because sadly, humans keep finding new ways to hurt each other throughout history.
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