Knowledge of the basic goods

Another central question that the natural law tradition has wrestled with concerns our knowledge of the basic goods. How can we come to know these fundamental goods?

Return to Aquinas's paradigmatic natural law position. His account of our knowledge of the fundamental goods has been understood in different ways (Murphy 2001, ch. 1). Some have understood Aquinas as affirming a theory of our knowledge of the fundamental precepts of the natural law that we can label ‘derivationism.’ The idea here is that we can derive from a metaphysical study of human nature and its potentialities and actualizations the conclusion that certain things are good for human beings, and thus that the primary precepts of the natural law bid us to pursue these things (cf. Lisska 1996). One can imagine a Hobbesian version of this view as well. One might say that by a careful study of the human being's desire-forming mechanisms, one can see that there are certain things that would be necessarily desired by biologically sound human beings, and thus that the human good includes these items. (Hobbes in fact produces such arguments at EL, I, 7.) While a natural law theorist might downplay the importance of derivationist knowledge of the natural law, it is hard to see how a consistent natural law theorist could entirely reject the possibility of such knowledge, given the view that we can provide a substantial account of how the human good is grounded in nature: for to show that the human good is grounded in nature is to show that human nature explains why certain things are goods, and it is hard to see how one could affirm that claim while entirely rejecting the possibility of derivationist knowledge of the human good (see Murphy 2001, pp. 16-17). Some have thought, echoing criticisms of natural law theory by those entirely hostile to it, that derivationist theories of practical knowledge fall prey to ‘Hume's Law,’ that it is impossible to derive an ‘ought’ from an ‘is,’ that is, any normative truth from any set of nonnormative truths. The most that this can show, though, is that the natural law theorist needs an account of those bridge truths that enable us to move between claims about human nature and claims about human goods.

It must be conceded, however, that a consistent natural law theorist could hardly hold that derivationist knowledge of the human good is the only such knowledge possible. For it is part of the paradigm natural law view that the basic principles of the natural law are known by all, and the sort of arguments that would need to be made in order to produce derivationist knowledge of the human good are certainly not had (or even have-able) by all. Another way that Aquinas's account of knowledge of the fundamental goods has been understood — and it is an understanding better able to come to grips with the widespread knowledge of fundamental goods — can be labeled ‘inclinationism.’ On this view, one's explicit grasp of the fundamental goods follows upon but is not derived from one's persistent directedness toward the pursuit of certain ends, which directedness involves an implicit grasp of these items as good. So human beings exhibit a tendency to pursue life, and knowledge, and friendship, and so forth; and reflection on this tendency occasions an immediate grasp of the truth that life, and knowledge, and friendship, and so forth are goods. The affirmation of the claims ‘life is good,’ ‘knowledge is good,’ ‘friendship is good,’ etc. makes intelligible the persistent pursuit of these ends by rational beings like us.

While inclinationism and derivationism are distinct methods, they are by no means exclusive: one can hold that knowledge of fundamental goods is possible in both ways. Indeed, it may well be that one way of knowing can supplement and correct the other. There may be some goods that are easier to recognize when taking the speculative point of view, the point of view of the observer of human nature and its potentialities, and some that are easier to recognize when taking the practical point of view, the point of view of the actively engaged in human life. Indeed, by connecting nature and the human good so tightly, the natural law view requires that an account of the good reconcile these points of view.

There are, of course, reasons to be worried about both of these ways of knowing basic goods — worries that go beyond general skeptical doubts about how we could know any normative truths at all. Derivationists have to explain how we come to know what counts as an actualization of a human potency, and have to explain how we connect these via bridge principles with human goods. Inclinationists have their own troubles. In particular, they need to deal with the fact that, even if they are not in the business of deriving goods from inclinations or identifying the goods precisely with what we tend to pursue, they take as their starting point human directedness. And it has been rightly noted that human directedness is not always a lovely thing. Power and prestige seem to be a matter of human directedness — at least as much so as, say, aesthetic enjoyment and speculative knowledge — but they do not make it to the natural law theorist's catalog of goods (though they do appear to be part of the good in Aristotle's picture; cf. the discussion in Hare 2001, p. 14). While these difficulties persist for inclinationist and derivationist accounts of knowledge of the basic goods, they may well be eased if one affirms both accounts: one might be able to use inclinationist knowledge to provide some basis for bridge principles between knowledge of human nature and knowledge of human goods, and one might be able to use derivationist knowledge to modify, in a non-ad-hoc way, the objectionable elements of the account that one might be bound to give if proceeding on an inclinationist basis alone.

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