ABSTRACT
Every science consists of a number of true universal statements, and, if ethics is to be regarded as a science, it must include a number of moral judgements that are true not merely for one individual but for all men or for all men of a certain group. Subjective ethics is by far the most commonly held form of relative ethics, and so deserves a special consideration. A common theory, closely akin to those that have just been refuted, is the view that when the authors say ‘This action is right’, what they mean is that all normal human beings like it or feel approval of it, or have some such attitude to it. The most common form of naturalism holds that ethical notions can be explained entirely in terms of psychology, and this may be called psychological naturalism.
