ABSTRACT
I shall follow the prevailing practice of taking ‘ethical’ and ‘moral’ to be synonymous. An ethical (or moral) system is a system of principles or values determining right and wrong. Such a system indicates what people must not do, what they are allowed to do and what they must not fail to do. It might also indicate how people ought to feel in certain circumstances – for example, it might hold that people are right to resent other people’s doing certain things and that they ought to feel guilty if they themselves do these things.
