Like his PhD advisor Quine, he is well-known for his belief that philosophy and science are continuous, and for his defence of ethical relativism, most recently and comprehensively in "Moral Relativism and Moral Objectivity" (Oxford: Blackwell, 1996).
Like his PhD advisor Quine, he is well-known for his belief that philosophy and science are continuous, and for his skepticism about conceptual analysis. In moral philosopher, he is best-known for his explanatory argument for moral anti-realism and for his defence of ethical relativism, most recently and comprehensively in "Moral Relativism and Moral Objectivity" (Oxford: Blackwell, 1996).