ONE WAY OF dividing up the different principles by which we acknowledge or ascribe goodness or badness to things (whether objects, actions, goals, states of affairs, etc.) is to suppose that there are some things that are good because they help us achieve other things, some of which must be just good in themselves. The first sort of goodness, the one dependent on the effectiveness of the object of reference (whether physical objects or other type) to perform some function for us or bring something about, is often classified as "extrinsic," as in being outside the object itself. That is, we would not care to obtain or achieve or use such objects if they did not serve our purpose in achieving something else. Some of those things which fit into the class of "something else" are then taken to have so-called "intrinsic" goodness, i.e., to be good no matter what purpose we mean to put them to because we desire their possession just for what they are.
Thus, philosophers have often divided the world of possible goods between the extrinsic and the intrinsic. The notion of extrinsic, or instrumental, goodness is easy enough to understand and largely uncontroversial. We have no reason to doubt the goodness of a thing which serves to get us whatever it is we want, that is to say, we have no reason to doubt its goodness for that purpose. And no one seems disposed to claim that there is no such thing as this kind of goodness (to the extent they are prepared to acknowledge that there is goodness at all). The problem arises when we turn to the moral case, however, for here what we want to call "morally good" produces a special class of things (actions, generally) which, if they are called good just because they are thought to be instrumentally so, do not seem to fit that case.
That is, while there are any number of moral claims we can make, far and away the most important are those which are motivated by concern for another's interest and not strictly for our own. Giving charity, avoidance of doing harm to another, reaching out to support others in moments of pain, respecting their persons, avoiding lying to, stealing from or otherwise injuring them, etc., all typically fall under the moral case. And yet, if we do any of these sorts of things because we wish to obtain some benefit for ourselves, we would not grant that they were motivated in a moral way.
To the extent that we undertake a so-called moral act only to bring about some other good that we want or need for ourselves, that act appears self-interested โ and self-interest abrogates the moral basis since, in any case in which self-interest is the predominant basis for acting, a different action, which lacks moral standing according to ordinary moral usage, may be justified or more justified. And so the fact that a presumptively morally good act may be justified by self-interest undermines that very justification for, if some things were different, the same justification would support our acting in what we take to be an immoral way . . . .
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