The quality of being brutish; uncivilized behavior, animal-like stupidity, or coarse insensitivity.
From brutish + -ness (suffix forming abstract nouns). Describes the quality of acting without reason, like a brute animal.
Philosophers from Hobbes onward used 'brutishness' to describe the worst aspects of human nature—interestingly, animals aren't actually cruel like humans can be, so the insult is kind of unfair to actual brutes.
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