Opening Paragraph: This paper is an attempt to introduce the subject of morality for scientific discussion after a new manner. It is inspired throughout by that part of Professor Malinowski's work which relates to Primitive Law, and which he has developed in Crime and Custom in Savage Society, in his introduction to Dr. Ian Hogbin's Law and Order in Polynesia, and in his oral teaching at the London School of Economics in recent years. In his analysis of law Professor Malinowski finds himself driven to the study of the whole body of sanctioned custom, and of all the various attractions and compulsions that lead men to conform to a social tradition of right behaviour. A certain portion of that field is here delimited for separate description, namely morality, which is that part of right custom that is sanctioned by religion.