Valerie Tiberius

In Plato’s dialogue the Republic, Glaucon challenges Socrates to prove that the just (or moral) life is better or more advantageous than the unjust one. Socrates’s answer to the challenge is notoriously unsatisfying. Could new research on well-being in philosophy and psychology allow us to do better? After distinguishing two different approaches to the question “why be moral?” I argue that while new research on well-being does not provide an answer that would satisfy Glaucon, it does shed light on the topic. Empirical research has different implications for our prudential reasons to be moral depending on which philosophical theory of well-being is accepted. Some well-being theories sustain stronger links to morality than others, but any theory of well-being can make use of empirical research to narrow the gap between prudence and morality to some extent.

Psychologists have recently shown an interest in certain thick concepts that used to be the domain of philosophy. In particular, they have proposed theories of well-being and wisdom and they have conducted many studies to determine the causes and correlates of their theoretical constructs. One might think that this research is irrelevant to philosophy because one assumes a sharp division of labor between philosophy and psychology. I argue that this is the wrong picture (as far as well-being and wisdom are concerned) and that things are more complicated than this. Once we see _how_ things are more complicated we can also see that thick concepts do hold out a special promise for making progress in moral theory, as Bernard Williams hoped.

When we are confronted with choices we take to be important, choices that affect our more important ends or goals, we usually attempt to judge what would be best for us. We reflect on what is best for us when we have to decide such things as which college to attend, whether to go to graduate school or law school, whether to marry, or whether to take our parents in when they need care. When we make such decisions, we think about what will contribute to the best life for us. In thinking about the best life for us, moral considerations matter, but they are not the only considerations we think are relevant. I will focus on aspects of these important choices that are not necessarily moral. The broad question that motivates this paper is this: what standards or principles govern good deliberation about choices of this kind?