What is good, how do we know, and how important is it? In this book, one of our most respected analytical philosophers reorients these questions around the notion of what causes human beings to flourish. Observing that we can sensibly address what is good for plants and animals no less than what is good for people, Kraut applies a general principle to the entire living world: what is good for complex organisms consists in the exercise of their natural powers.

Dan Haybron has argued by counterexample that perfectionism fails as a theory of well-being. I respond by articulating two different versions of diachronic perfectionism, which takes into account the level of development and exercise of essential human capacities over the course of an entire lifetime.

Perfectionism, or the claim that human well-being consists in the development and exercise of one’s natural or essential capacities, is in growth mode. With its long and distinguished historical pedigree, perfectionism has emerged as a powerful antedote to what are perceived as significant problems in desiderative and hedonist accounts of well-being. However, perfectionism is one among many views that deny the influence of our desires, or that cut the link between well-being and a raw appeal to sensory pleasure. Other views (...) include, for instance, the “objective list” view,1 the so-called “restricted achievement” view,2 and various hybrid views that combine an appeal to desire or pleasure with an objective standard of evaluation of those desires or pleasures. (shrink)

In this paper, I investigate David Hume’s theory of well-being or prudential value. That Hume was some sort of hedonist is typically taken for granted in discussions of his value theory, but I argue that Hume was a hedonist of pathbreaking sophistication. His hedonism intriguingly blends traditional hedonism with a form of perfectionism yielding a version of qualitative hedonism that not only solves puzzles surrounding Hume’s moral theory, but is interesting and important in its own right.