In philosophy, the textbook case for the discussion of human motivation is the examination (and almost always, the refutation) of psychological egoism. The arguments have become part of the folklore of our tribe, from their inclusion in countless introductory texts. [...] One of my central aims has been to define the issues empirically, so we do not just settle them by definition. Although I am inclined at present to put my bets on the reward-event theory, with its internalism, monism, and (...) causal primacy of satisfaction, I think we are very far from knowing enough to settle these questions concerning motivation, human or otherwise. The winds of science will blow where they may. In the meantime, we can be a bit more circumspect about what we put in our tribal folklore. (shrink)

To the question ‘Why do you try to realize this?’ your answer may be ‘Because I desire that and I think that the realization of this would involve the realization of that.’ Or your answer may be ‘Because I desire this.’ If ‘Why?’ is interpreted as ‘Desiring what?’ the question ‘Why do you desire this?’ is improper. The word ‘desire’ is, however, frequently used in such a way as to countenance the impropriety. It is so used not only when what (...) is pursued only as a means is said to be desired, but also when a desire for what possesses one character is said to be a desire for what possesses a a concomitant character. Strictly, perhaps, an object of desire is describable in terms only of the character immediately relevant to the desire. The expression ‘to desire what is X qua X’ is perhaps redundant; and the expression ‘to desire what is X qua Y’ is perhaps self-contradictory. But those who think, so must admit that such expressions are current among even careful speakers. (shrink)