"A revolution was never fought, throughout history, for ideals. Revolutions were fought for much more concrete things: food, clothes, housing, and to relieve intolerable oppression. … I know of no one, outside of Patrick Henry, willing to die for an abstraction."

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Accordingly, France Had Voltaire, and his school of negative thinkers, and England (or rather Scotland) had the profoundest negative thinker on record, David Hume: a man, the peculiarities of whose mind qualified him to detect failure of proof, and want of logical consistency, at a depth which French skeptics, with their comparatively feeble powers of analysis and abstractions stop far short of, and which German subtlety alone could thoroughly appreciate, or hope to rival.

— John Stuart Mill