 For purposes of this entry, it will not be assumed that value monism rules out incomparability. In any case, many philosophers argue for some form of value pluralism (Berlin 1969, Finnis 1981, Nagel 1979, Raz 1986, Stocker 1990, Taylor 1982, Williams 1981). Although this entry will not assume value pluralism, most philosophers who argue for incommensurability or incomparability are value pluralists, so it will be simpler to present their views by talking of separate values.