C. D. Broad (1887-1971) on Ethical Naturalism
The question of analysis brings us to another question which is very closely connected with it. Are moral predicates, such as right, ought and good, unique and peculiar; or can they be completely analysed and defined in terms of non-moral predicates? Theories which answer this question in the affirmative are called naturalistic; those which answer it in the negative are called non-naturalistic. The following would be typical examples of naturalistic theories. “Better conduct means conduct that comes later in the course of evolution and is more complex and unified than earlier conduct of the same kind.” “Right action means action which tends to promote the stability and increase the complexity of society.” “To say that a person ought to do so-and-so means that, if he does not, he will be punished either in this life by his fellow-men or in the next by God.”
It should be noticed that, if any form of the Emotional Reaction analysis be true, the question is answered automatically in favour of naturalism. Ethics becomes a branch of psychology. Nevertheless, there would remain a somewhat similar question even for those theories. It would take the following form. “Is the emotion which we express, or assert ourselves to feel or to have a disposition to feel, or which we assert that most members of a certain class have a disposition to feel, when we utter a moral sentence in the indicative an emotion of a quite unique kind? Or is it just a combination of emotions, e.g. fear, love, hope, etc., each of which can occur in non-moral contexts?”
If the Objective Analysis be correct, the question of Naturalism v. Non-naturalism remains quite open, and special arguments are needed to answer it.
The importance of the question is this. If Non-naturalism be true, Ethics is an autonomous science with an irreducibly peculiar subject-matter, though it will still have very intimate connexions with certain other sciences, such as psychology, sociology, etc. But, if Naturalism be true, Ethics is not an autonomous science; it is a department or an application of one or more of the natural or the historical sciences. Now the reduction of a plurality to a unity is a source of intellectual satisfaction, and therefore philosophers have a strong motive for trying to produce a workable naturalistic theory[.]
(C. D. Broad, “Some of the Main Problems of Ethics,” Philosophy 21 [July 1946]: 99-117, at 102-3 [italics in original])
Note from KBJ: I’m an ethical non-naturalist.