British philosopher and educator and an advocate of a Neo-Realist school of thought; he is noted for his proposals toward a general theory of personal and normative ethics (as against the purely descriptive). He proposed a theory of the intuitive knowledge of good and duty (“deontological”) that dispensed with the necessity for an essential concept or definition of the good. His principal writings include Kant's Treatment of Causality (1924); Reason and Intuition (1941); The Fundamental Questions of Philosophy (1951); Ethics (1953); and Non-Linguistic Philosophy (1968). His essays in philosophical journals emphasize Realist theories of knowledge and the possibility of a meaningful metaphysics.