 This position that links happiness and virtue is called eudaimonism – a word based on the principal Greek word for happiness, eudaimonia. By eudaimonism, we will mean one of several theses: (a) virtue, together with its active exercise, is identical with happiness; (b) virtue, together with its activities, is the most important and dominant constituent of happiness; (c) virtue is the only means to happiness. However, one must be cautious not to conclude that ancient theories in general attempt to construe the value of virtue simply as a means to achieving happiness. Each theory, as we shall see, has its own approach to the nature of the link between virtue and happiness. It would not be advisable to see ancient theories as concerned with such contemporary issues as whether moral discourse – i.e., discourse about what one ought to do – can or should be reduced to non-moral discourse – i.e., to discourse about what is good for one.