David Hume, the 18th-century Scottish thinker known for his philosophical realism--
Morality is nothing in the abstract nature of things, but is entirely relative to the sentiment or mental taste of each particular being.
--Philosophical Essays Concerning Human Understanding (London: Miller, 1748), 14. (Hume is relying on Francis Hutcheson when he makes the assertion)
One more indication that "postmodernism" is not as revolutionary as we've been taught.