 Aristotle’s theory, which we may call a Perfection in Functioning View, accommodates both pleasure’s generic unity and specific diversity by making pleasure and its value vary together, with the varying nature and value of animals’ various life activities, and these, in turn, with those of their objects or ends. It has had a deservedly great influence on later accounts, from later antiquity to recent philosophy and welfare  economics.[15]  Recently the prolific social psychologist Mihaly Csikszentmihalyi’s studies mainly of self-reports of the ‘flow experience’ of engaged absorption in activities have provided some empirical support for flow’s connection with enjoyment, but also, perhaps, for its not, despite its advertising, being the very same thing – as he, like Aristotle, in his improving exhortation, sometimes seems to want it to  be.[16]