 Over the last few decades, so-called ‘positive psychology’ has hugely increased the attention paid by psychologists and other scientists to the notion of ‘happiness’. Such happiness is usually understood in terms of contentment or ‘life-satisfaction’, and is measured by means such as self-reports or daily questionnaires. Is positive psychology about well-being? As yet, conceptual distinctions are not sufficiently clear within the discipline. But it is probably fair to say that many of those involved, as researchers or as subjects, are assuming that one’s life goes well to the extent that one is contented with it—that is, that some kind of hedonistic account of well-being is correct. Some positive psychologists, however, explicitly reject hedonistic theories in preference to Aristotelian or ‘eudaimonist’ accounts of well-being, which are a version of the ‘objective list’ theory of well-being discussed below. A leader in the field, Martin Seligman, for example, has suggested that, rather than happiness, positive psychology should concern itself with positive emotion, engagement, relationships, meaning and accomplishment (‘Perma’) (Seligman 2011).