The quality or state of being calm, objective, and free from emotional bias.
Formed from dispassionate + -ness (a suffix that turns adjectives into nouns describing qualities). This noun form became common in the 17th-18th centuries as philosophers emphasized the importance of impartial judgment in reasoning and ethics.
In the Age of Enlightenment, thinkers valued 'dispassionateness' as the gold standard for making good decisions. It shows how English created an entire vocabulary around the idea that emotions can cloud our judgment!
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