" the hypothesis of value realism is superfluous—a wheel that spins without being attached to anything. From a Darwinian perspective our impressions of value, if construed realistically, are completely groundless. And if that is true for our most basic responses, it is also true for the entire elaborate structure of value and morality that is built up from them by practical reflection and cultural development—just as scientific realism would be undermined if we abandoned a realistic interpretation of the perceptual experiences on which science is based. Even a system based on the maintenance of coherence or consistency among one’s responses does not need the idea of mind-independent truth about value (as opposed to logic), "

― Thomas Nagel , Mind and Cosmos: Why the Materialist Neo-Darwinian Conception of Nature Is Almost Certainly False