...the tale that thus falls to be told is not in outline excessively complex, and can be seen as a quite intelligible sequence of distinguishable episodes. The major stages on the road are three in number. There is, first, Intuitionism, to be considered here as represented by G.E. Moore (Principia Ethica, 1903), H.A. Prichard (Moral Obligation, published posthumously in 1949), and W.D.Ross (The Right and the Good, 1930, and Foundations of Ethics, 1939). Second, in somewhat violent reaction to the undoubted shortcomings of that style of ethics, we have Emotivism; and here the chief spokesman is C.L. Stevenson (Ethics and Language, 1944). And, third, as an amendment of and an advance from Emotivism,... Prescriptivism, whose most lucid, persuasive, and original exponent is R.M. Hare....2