In his book The Right and the Good Professor W. D. Ross states a theory that ethics is concerned with two distinct conceptions which are logically quite independent of each other and must not be confused: the right, viz. the act which we are under an obligation to do irrespective of our motives, and the morally good, viz. the good motives, desires and so on, irrespective of what actions they lead us to. In a later book, Foundations of Ethics, he repeats this theory somewhat altered and enlarged. Professor Broad says about the first book that it is “the most important contribution to ethical theory made in England for a generation,” and for the second book he proposes the nickname “the righter and the better.”