Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
“It is my opinion that the Summa Theologica is one of the best sources we have for moral
philosophy, and moreover that St. Thomas’s ethical writings are as useful to the atheist as to the
dispositions good or bad, right or wrong, just or unjust, and it is almost impossible
confidence. Moral philosophers are typically charged with the task of giving an
account of these judgments, and thus of our entitlement to use words like ‘good’ and
‘ought’ regarding human actions and acts of will. More specifically, the moral
philosopher is supposed to show how there can be objective truth conditions for
such claims. What normative standard licenses these judgments, and how are we to
utilizing the concept of natural goodness and defect. To put the evaluative scheme
of natural goodness in the simplest possible terms, we can say that an action is
naturally good insofar as it exemplifies the life that is characteristic of the species in
question, and bad insofar as it fails to do this. Just as strong, deep roots are naturally
good for the oak tree, since they are necessary to carry out the activities that
constitute oak life, so too virtues like justice and prudence are naturally good for
human beings, since they are necessary to carry out the activities that constitute
human life. Life, on this account, is a form of intrinsic value, since the goodness of
1
Foot (2002, 2).
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Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
the activities that constitute a form of life does not go beyond the fact of the existence
of that very form of life. The promise of ethical naturalism, then, is that it will show
The ethical naturalist asks us to take seriously the idea that practical norms—
norms that license our talk about what it is good for us to be, do, and have in general
—are a species of natural norms.2 Or to put it another way, that moral goodness and
badness is a kind of natural goodness and defect in the life of a certain animal—viz.,
we human beings.
Philosophers have, by and large, balked at this suggestion, and for disparate
reasons. For the purposes of this essay, I want to focus on one particular line of
resistance. The objector I have in mind does not want to deny the ethical naturalist
her theory of natural normativity in general, nor does she want to deny that there
are natural norms that pertain to specifically human life. Rather, she denies that the
standards that govern the operation of a power of reason can be specified in terms of
the characteristic ends and activities of just one species of animal. Though it is of
course quite natural for human beings to reason about how to live and act (all mature
human beings have to think about what to do to a certain extent), the objector
contends that the account of whether one reasons well or badly has nothing to do
with any substantive facts about the material form of life we happen to bear. We
typically think of rational norms as formal canons that are universally binding on all
beings with a power of reason. If this standard account of the norms of right reason
is correct, then nothing about the vicissitudes of one form of material life over
another could possibly make a difference either to the constitution or force of such
norms.
2
Philippa Foot puts it this way: “Moral judgment of human actions and dispositions is one
example of a genre of evaluation itself actually characterized by the fact that its objects are living
things.” (2001, 4)
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Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
Besides looking to Kant as a source for this view, we might also look to
Aristotle himself.3 After all, in his ethical treatises Aristotle is not at all concerned
with different species of living things; instead, he focuses on different levels or kinds
argument is that the standard of good human life and action just is “activity of the
soul in accordance with reason.”4 Now, if living well as a human being just is to live
in accordance with the norms that govern a power of reason, then it looks the search
for the norms of good or bad human action is just the search for rational norms,
We can put this line of resistance into the form of an argument against ethical
In short, the objection questions the relevance of the concept ‘human being’ for a
‘naturalistic fallacy.’ But rather than crudely rejecting any move from ‘is’ to ‘ought’,
it merely blocks the inference at one crucial juncture—the inference from the ‘is’ of
the species, to the ‘ought’ that governs the rational will. Given the presumptive
authority of the objector’s conception of rational norms, the burden is on the ethical
naturalist to show that premises one and four of the argument are false. The ethical
3
This is Korsgaard’s reading of the function argument in the Nicomachean Ethics. See Korsgaard
(2009, chapter 4).
4
EN, I, 7, 1098a8-18.
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normativity from natural normativity. More specifically, she must argue that we
cannot understand the norms that govern the power of practical reason in a living
thing apart from substantive reflection upon the life form for the sake of which that
whether the two most prominent accounts of ethical naturalism on offer contain
within them the resources to address the irrelevancy objection, and conclude that
they do not. In the second section, I argue that this failure exposes a second, and
potentially more difficult version of the original objection. In the third section, I
articulate a dilemma for the ethical naturalist, and argue that any future attempt to
rehabilitate the view must show how this dilemma can be resolved. In the fourth
section, I argue that we can find a resolution to the dilemma if we reflect upon the
account of practical reason and will articulated by Thomas Aquinas. I claim that
Aquinas’s theory shows us how we can reconcile what on that face of it appear to be
two opposing teleological forms—that of life, on the one hand, and that of rational
choice on the other. Finally, I conclude that the only viable way to be an ethical
In order to answer the irrelevancy objection, we need an account that shows how
practically rational norms can be natural norms. In this section, I contend that
will not reach this conclusion by exhaustively canvassing the literature, but rather by
focusing on the two most prominent and influential proposals currently on offer: the
5
Of course, if we give a “naturalistic” account of a power of practical reason we must give the
same sort of account of theoretical reason. For the purposes of this essay, however, I limit my
argument to the practical case (and even then my aim is only to show how it is possible to
understand practical reason in this way).
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Setting aside many of the details, Hursthouse argues that virtues like charity and
justice are morally good character traits because they are necessary for the
attainment of the four ends that define the life of a general, goodness fixing kind
under which our own form of life can be subsumed: ‘sophisticated social animal.’
Thus, she argues that ethical evaluations of ourselves as rational social animals will
look like our evaluation of the lives of other sophisticated social animals we discover
in ethological field reports.6 Her account of the ends that govern this general
A character trait will be good, on this account, just in case it can be shown to serve
the four ends appropriate to higher social animals in general. And we can justify
our belief in the goodness of the traditional virtues by looking to this naturalistic
scheme in order to determine that these four common ends are promoted by
virtuous actions.8
And that’s exactly what Hursthouse sets out to do. Charity, on her account,
turns out to be vindicated as a virtue because it helps human beings “live longer,
avoid some suffering, [and] enjoy more.”9 Justice is also a virtue on this evaluative
6
Hursthouse, (2004, 268).
7
(2004, 268).
8
Hursthouse believes that this investigation will proceed from within our well formed ethical
outlook. By this she seems to mean nothing more than that we can only call particular virtues
into question one at a time, rather than throw out the whole lot in order to build them up from
scratch from a morally neutral perspective.
9
(2004, 269).
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One benefit of Hursthouse’s view is that it makes especially clear what the
natural standards of good reasoning are. Our practical reasoning (and thereby our
will and action) is excellent when it functions to attain the four natural ends she
identifies, and it is defective when it does not do this. The ends of right practical
reasoning are “natural” in some reasonably familiar sense: these are norms that
pertain to all higher social animals, and there is an empirically grounded literature
that can testify to this. Given this, we can say that virtuous activity is naturally good
because it is necessary for the attainment of these ends that we demonstrably share
Whatever benefits can be gained from the clarity of such an account do not
outweigh its substantial costs. I will argue these costs are threefold: (1) it gives us
account of human nature that is ultimately reductive and empirical, (2) the account
from our observational knowledge of all known species of social animals. Her idea
is that we know what the general ends that constitute human life are by extending
our observational knowledge of social animals in general to see that it is basically the
same for us. This means that, at bottom, fully justified ethical knowledge is a species
herself is deeply ambivalent about accepting.11 Most moral theorists will reject the
10
(2004, 270).
11
On this issue, Hursthouse seems to be speaking out of both sides of her mouth. She wants to
acknowledge to Aristotelian critics like John McDowell that naturalistic considerations do not
convince anyone to change their basic moral beliefs or motivate them to action. But at the same
time, she thinks that she can approach the Humean or the Kantian and argue for “the rational
credentials” of our moral beliefs based upon a “scientific” and “objective” naturalistic account. It
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idea that we can gain moral knowledge by investigating what is going on at a high
Hursthouse identifies are not species specific standards; the ends that govern right
practical reasoning are ends shared in common by all sophisticated social animals.
The goodness fixing kind that is operative in this account is not a flesh and blood
species such as ‘human being,’ but something far more general and abstract. This is
presented, and it difficult to square with its basic principles. 13 But the more pressing
concern from our perspective is this: once we have made this generalizing move,
why should we not think that the relevant generality lies somewhere higher up the
scala naturae than Hursthouse suggests? Certainly ‘sophisticated social animal’ is not
a category that Aristotle himself bothers with, and Hursthouse gives us no reason to
favor it over ‘rational life.’ Why should we not be worried about the ends shared in
common with members of that kind? Hursthouse has no compelling answer to this
animal,’ which brings us to the third and final complaint. The promise of ethical
terms. But moral judgments are typically thought to address the question of
intrinsic value—activities and actions whose goodness does not consist in the fact
that they are instrumental to some other good, but whose value is contained “in
is unclear how she is supposed to satisfy both parties at once, and the tension remains unresolved
in her own work.
12
I explore the metaphysical implications of reverting to generic forms of life in another paper,
“Practical and Natural Normativity” (unpublished manuscript).
13
The original suggestion comes from Anscombe (1958), and is later developed by Geach (1977).
The semantics of ‘good’ utilized by the theory is developed by Geach (1956) as well.
14
Hursthouse (2004, 272). This is a line of justification also pushed by Annas (2005).
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itself.” The value of the characteristic activity of one’s own form of life cannot be
explained by some good external to that form of life; the good of it just is that it is the
vital operation of the species in question. But Hursthouse’s picture is not like this.
According to it, our rational activity is good when it serves ends that go beyond a
We can bring this worry into sharper relief if we consider that Hursthouse’s
stated goal in providing this theory is to provide “a rational justification for one’s
ethical beliefs.”15 But her justificatory scheme yields that the wrong kind of reason to
hold a moral belief. To see this, consider a basic human activity, such as leisurely
play. Human beings engage in this kind of play from infancy on. 16 By play, I do not
mean highly competitive sports or the highly structured events when these take
place, but just the way we often are in our leisure time, when we are not actively
moments content merely to have fun and enjoy ourselves, for no particular reason.
Play is just one of a whole range of activities that lose their joy and goodness when
they are done for the sake of something else; other examples of such activities are
singing, making music, dancing, conversation, and telling and hearing stories.
Of course, we know that play is very important for proper intellectual, social,
moral, and even physical development in children, as well as for the overall health
However, it would destroy play if these were our reasons for playing. If you told a
child that you wanted her to play in order to increase her social and imaginative
15
(2004, 275).
16
Children, having a great deal of leisure time, are often engaged in play of this sort. In fact, this
sort of play is as natural to children as seeking nourishment and protection from their parents. A
child who does not know how to engage in imaginative play for no purpose (such as a child with
an autism spectrum disorder), is a child who has a noticeable defect and will need therapeutic
intervention. Such a child will have to be taught what other children naturally do, and such
instruction cannot merely be given by the parent, but comes in the form of theory-driven
techniques aimed at incremental results. Similarly, an adult who could not play with a child for
fun would be a sorry sort of man.
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cognitive capacities, you would no longer be asking that child to play. Because if
done for the sake of those further ends, then the child would no longer by playing at
all; instead, the child would be engaging in the work of becoming smarter, more
justification” for play—either for oneself or for one’s children—play has effectively
been denatured and destroyed. The only reason to play is because it is play—its
meaning and value is inherent to the known experience of the activity itself. If play
is an activity that exemplifies human life, then there can be no further ground of its
I would like to suggest that Hursthouse is doing the same thing to virtuous
activity that an overbearing parent might do to the play of the child in the nursery—
destroying what is good in itself by trying to make it for the sake of some external,
value. It is only to recognize that the meaning or value of the activity cannot be
explained outside the performance of the activity itself. By trying to show that
virtuous activity is good because it helps us to attain the ends common to all
virtuous.17
Thus Hursthouse goes very wrong, it seems to me, when she argues that her
naturalism will yield “motivating reasons” in children who are learning to acquire
virtue, and in those who already have some semblance of virtue but might need
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I think that there are, indeed, contexts in which naturalistic arguments play a role in
producing motivating reasons, most notably in the moral education of children.
When we are trying to inculcate the familiar virtues in them, indicating the
important virtues in them, indicating the important role that charity, justice,
honesty, etc., play in human life is, I suspect, an indispensable part of that training.
I might too, reflect on the naturalistic arguments to beef up my own motivation if I
thought it was getting a bit slack.18
I think this is a deeply wrong view of moral upbringing and moral motivation. If I
tried to curb my daughter’s selfish tendencies by telling her that she ought to love
others because if she does, she might “live longer, avoid some suffering, and enjoy
more things,”19 then I would obviously not be instilling charity in her. By providing
which is to take the good of another as one’s own without counting the cost or hope of
by telling myself that if I am not I will “miss out” on characteristic joys, then I am
not thereby becoming more, but rather less generous. It will not help me to seek
generosity for its own sake by being able to see how it instrumental to getting
something else that is really good (say, being a good ‘sophisticated social animal’). In
The problems with Hursthouse’s view are not slight. On her account of
moral judgment, human nature only enters into it from an alienated, third-personal,
utterly non-practical perspective, and only then as but one instance of something
18
(2004, 275).
19
(2004, 269).
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human form that will meet what she calls “Hume’s practicality requirement.” 20 And
she does not want to say that meeting the practicality requirement will require
ignoring the appeal to natural norms from a practical point of view. Foot is
concerned to show that the recognition of natural human goods can be practically
Foot’s account of practical rationality and will largely follows that of Warren
Quinn.21 Like Quinn, Foot argues that practical reason is distinguished from other
reasoning about human ends (i.e., goods). On this account, practical reasoning is
excellent when it arrives at true propositions about these ends. Quinn writes:
Practical thought, like any other thought, requires a subject matter. And for
human beings the subject matter that distinguishes thought as practical is, in the
first instance, human ends and action insofar as they are good or bad in
themselves […] practical thought deploys a master set of non-instrumental
evaluative notions: that of a good or bad human act, a good or bad human life,
a good or bad human agent, and a good or bad human action. Practical reason
is, on this view, the faculty that applies these fundamental evaluative concepts.22
According to Quinn, practical reasoning is reasoning about human ends and actions
that it has a species specific subject matter and deploys a species specific set of non-
concepts and to reason about this subject matter correctly. To judge that some
prospective action is truly good is to give oneself a practical reason to pursue it. 23
Foot accepts this account, but puts her own stamp on it by arguing that the
good and bad in question is natural goodness and defect. She writes that
20
(2001, 9).
21
Quinn (1994, chapters 11 and 12).
22
(1994, 233)
23
Quinn also argues that we need an account of the will which would make it clear that it is “the
part of human reason whose function it is to choose for the best,” though he leaves this “part” of
reason basically un-theorized. He seems to think it will naturally fall out of an account of
practical reason. See Quinn (1994, 240).
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What Foot adds to the view is that the objective concepts practical rationality utilizes
The basic account of practical reason that Foot and Quinn are working with is
a variant of what Berys Gaut has called the recognitional model.25 Gaut defines this
actions independently of their being objects of choice, and through that very
recognition actually bringing it about that such actions are performed. 26 There is no
are one and the same act. What makes the performance of a certain action rational is
the recognition that the action is really good, and this recognition is what primarily
together with her account of the sort of facts about human nature that interest Foot,
we arrive at the following picture of moral judgment within the schema of natural
goodness and normativity. The virtuous person is one who makes true judgments
about what is choiceworthy for human beings (the one who perceives the right
reasons to act), and she is able to do this because she knows the correct facts about
human life.
weds recognitional realism about practical reasons with a naturalistic account of the
24
(2002(b), 173).
25
Gaut (1997, 161-162).
26
For other variants of recognitionalism, see Shafer-Landau (2003), Nagel (1970), (1986), and
Dworkin (1996).
27
Foot (2001, 23).
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judgment as a practical-natural judgment. That is, they are judgments about what is
good or bad for a living thing, but since they are about the very living thing we are,
they function to produce or prevent voluntary actions. Action springs from insight
into human goodness, insight that is efficacious in itself and not because it is useful
for the sake of something else. According to the recognitional naturalist, a virtuous
person keeps her promises not because this is instrumental to being a good social
reason that shows us how its norms are norms of a species: practical reason is an
regarding the goods constitutive of human life. These goods are the standard of
right reasoning, such that the reasoning is good if it serves to secure human goods
and bad if it does not. The virtues are good because they dispose us to seek these
goods.
still worry that the “practicality requirement” has not been met in a plausible way.
Foot accepts the first two. According to her own theory of natural normativity,
natural historical judgments register third personal, theoretical facts about the life
form which falls under the subject term. It is no part of that view that such
judgments are practical or have any motivational upshot. Like any theoretical
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judgment they merely register facts about the way the world is. Given that, Foot’s
real problem is that she has to deny the third premise, and it is hard to see how she
can. Foot’s recognitional realism suggests that the difference in our evaluation of the
goodness of an oak tree’s roots and a human being’s action is a matter of the
propositional content one considers. Practical thought and judgment is thought and
judgment about a certain kind of thing—the very thing we are. Life thought is
practical, on Foot’s view, when it is thought about our own form of life. I will go on
I can think of at least three reasons to be doubtful that Foot has good grounds to
deny the third premise. First, suggesting that we can make a theoretical judgment
can explain how we know our own thoughts by taking our visual capacity to know
objects in the world and directing it inward, so that we can see the "inner" objects in
essentially the same way.28 The correct response to this sort of view is to point out
that the mode by which I know my own mind is formally quite different from the
mode by which I perceive objects distinct from myself. It is not a matter of directing
and inference) by virtue of its content. If this method of division were properly
mince pie syllogism,” which supposedly displayed the special form of reasoning
that occurs when our thoughts turn to mince pies. 29 But this is absurd.
about human goods is the same as having a goal to realize them. This might be true
for a theory that takes the explanation of action to come by way of appeal to
28
The locus classicus of this critique of theories of self-knowledge is Shoemaker (1996).
29
See Anscombe (2000, 58).
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instance—can explain how an event under the description that matches the
propositional content comes to be.30 But Foot does not seem to want to go in for this
kind of explanation, especially not a Humean version that would appeal to the
“direction of fit” of non-cognitive states. But if we leave the causal theory behind,
practically efficacious. After all, Alpha Centaurians could surely make true natural
historical judgments about the human life form and not be motivated by them, so
Foot simply takes it for granted that thought about our own life form is
intrinsically motivating because it is thought about us. We care about human goods
because we are human beings, so the comparison with the Alpha-Centaurian is not
apt. We humans are all necessarily in the business of living human lives, and so we
would argue that is not true that we are interested in them because we recognize that
they are human goods—i.e., because we have beliefs about them whose propositional
not seem true that the fact that the goods are the good of humankind enters into my
practical thought as its essentially motivating content. And for that very reason the
For instance, suppose that I know it is good for human beings to consume
Suppose I even judge that this gives me a reason to consume antioxidants whenever
I can. Nothing about action follows from this line of thought—I have merely had
30
For an especially clear exposition of the direction of fit view, see Smith (1987), and Velleman
(1992).
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three true thoughts. We do not need to say that I lack prudence, or am thoroughly
vicious or weak willed to explain why no action follows from my putting these
thoughts together. The explanation may just be that I am not thinking with a view to
action at all. Thus, taking a proposition about human goods, my good, or reasons to
be true is not the same as having a reason to act. We can contemplate practical
I am a human being
So I need antioxidants
We cannot say that the rational recognition of the need will lead to action. The
conclusion reached is just another true proposition. Suppose this line of reasoning
were to be taken up by someone who doesn’t give one whit about his health (this is
not only possible, but rather common). Suppose that he wants to “live free and die
young.” Would an appeal to health as necessary for the species help to change his
These are signs that the above mentioned line of reasoning is theoretical.
There’s nothing we could add here to make the reasoning practical. To see this,
consider that it will not help to suppose for the sake of argument that I actually want
I am a man
Does an action follow from this line of thought? I don’t see how. At best what
follows is the thought that I should want to consume some antioxidants, as a true
claim about the state I ought to be in given the presence of a certain desire. But it
isn’t even clear that this much follows, since there are plenty of other ways for a man
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to attain health other than this, and it may be that antioxidants are less preferable
given other considerations (such as cost, availability, and so forth). Moreover, the
appeal to human nature here is simply idle. It looks like we could take it out and not
The trouble the ethical naturalist faces at this point is pretty straightforward.
The third personal facts about what is good for the species have their natural home
in theoretical reasoning about what is truly good for a life form, rather than practical
thought about what to do. And it is mysterious how such facts are supposed to
make an appearance in practical thought. The considerations that Foot gives, such
as the fact that we are social animals or that we can’t get along without justice,
simply look out of place from a practical point of view. Thus, however thoughts
about the human life form are related to right practical reasoning, it simply cannot
enter into the picture at the level of content, that is, it cannot enter into the structure of
anyone’s practical reasoning as a premise. So long as that is the picture, then natural
We can at this point conclude that Foot’s attempt to show how norms of the
species are practical failed, because she put forward a model of practical reason that
looks too theoretical. It was for this reason mysterious how natural historical
judgments could play any role in a theory of good practical reasoning, deliberation,
and choice. This shows we do not yet know how a natural historical judgment about
the self-maintenance of human life can be a practical judgment. We only know that
the practicality cannot come just by shifting the subject matter to our own life form,
as Foot suggests.
We might think that it remains open to Foot to say that we can only have
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Then she could say that to possess practical wisdom is to know how a human being
should live, and to be able to see that general conception of how to live in the
particulars of one’s own life. Since we cannot have practical wisdom without moral
virtue, we cannot separate knowledge of the human life form from being inclined to
the ends that make up a human life. On this picture, knowledge of the facts of
human life, and the ability to specify those facts in true Aristotelian categoricals,
only comes on the scene once one has come to have a well-formed “second nature.” 32
This sounds promising, but let us follow the thought through. On this
picture, one can only know human goods if one already values them, and thus is
already strongly inclined to seek those goods. Coming to possess virtue is coming to
see and take enjoyment in doing certain things, which is coming into possession of a
human life properly so called. The virtuous person knows which actions accord
with virtue and which do not, and because the virtues characterize what goodness of
human action is, the virtuous person knows what counts as living and acting well.
This is knowledge of the human life form, and it comes through practical wisdom.
anthropologist who came to study human life could not come to make any judgment
of human life form, as presumably it will, by definition, lack the virtues necessary
for practical wisdom, which is necessary to have knowledge of human form. Thus
the alien anthropologist cannot know the human good anymore than a human being
can see the world in hyperspectral color by studying the lives of Mantis shrimp.
good of the life form is internal to itself, knowledge of the good of the life form is
obviously not. I can know the good of a sunflower, or a wolf, just by knowing what
it is. I do not, as it were, have to step inside that form of life, or to have the
significant, because ‘second’ nature norms are natural norms. For another attempt to collapse the
distinction, see Thompson’s “Forms of Nature” (unpublished manuscript).
32
For the full development of the idea of “second nature” see McDowell (1994).
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expect an alien anthropologist would be able to come to make true natural historical
judgments about human beings. Of course, it cannot come to know the subjective
bat.”33 But an alien anthropologist should be able to make true natural historical
judgments about human life—the very same ones that the virtuous person could
human life is just knowledge through virtue, however, then it is difficult to know
Notice that this is not just a problem for rational aliens. If only the virtuous
know human nature through virtue, then the non-virtuous also do not have
knowledge of their own form either. Perhaps one could come to discover one’s own
form, should one happen upon a virtuous community like the men of Athens and be
suitably instructed; or perhaps there is simply no hope for those who are not raised
in the right way to begin with, as they are completely outside the sphere of practical
wisdom. It seems as though Aristotle thought many humans were like this: slaves,
of the perception of human goods, I do not think it helps the Foot-Quinn model to
33
Nagel (1979).
34
I am not supposing that this would be easy, just not impossible. It is the potential to know
human life from a third personal point of view that distinguishes ethical naturalism from
constructivism. The constructivist argues that true normative judgments represent a normative
reality, but denies that the reality represented is in anyway independent of the normative
judgment itself. I take it that if ethical naturalism is supposed to be a meaningful alternative to
constructivism, it must deny that the normative reality it is concerned with is a reality that is
entirely constructed from acts of practical judgment and nothing more. For more on this
structural feature of the constructivist project, see LeBar (2008) and Street (2009).
35
It’s also pretty unclear how this person is responsible for his behavior. I find this view strange
in that it makes it seem as though being good is, to a large extent, being lucky that one was raised
in “the right way.” If you are raised by bad parents, perhaps within a political community that is
not governed by just laws, then you are forever doomed to remain ignorant of your own nature.
And it’s hard to argue that that sort of ignorance would not be exculpatory.
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Consider the irrelevancy objection. We must remember that the stated purpose of
should be determined by quite general facts about human beings.” 36 But if the idea
is that the virtuous alone have epistemic access to these facts, then it becomes
determination in question. On the one hand, if you are already virtuous, then from
your own perspective there is nothing to be determined. On the other hand, if you
have been raised to be non-virtuous, you have no epistemic access to these facts, and
then they cannot enter into your reflection and deliberation. Moreover, once you
come to know them, they immediately become superfluous to you. As for the alien
anthropologist, human life and action will, from its point of view, remain shrouded
cannot come to acquire human virtues. On this new version of ethical naturalism,
unnecessary.
In thinking through the claims of ethical naturalism, we have come to see that, so far
at least, we do not know how natural norms can be practical, or how practical norms
can be natural. We can put our problem in the form of a dilemma for the ethical
naturalist. If she takes the first horn and stresses that ethical naturalism provides
objective, natural norms of the species as the ground of our moral beliefs and
judgments about what is true of our own species are not necessarily practical. But
moral judgment must meet this requirement, so the theory is inadequate. If she
takes the second horn and stresses how ethical naturalism yields a picture of
knowledge of human life that is practical because it comes through the virtues, then
36
(2001, 45).
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we lose our grip on how the knowledge is based on natural, objective facts about the
standpoint. And then the theory fails because the norms no longer appear to be
natural—i.e., (at least potentially) accessible from outside that form of life.
The problem our dilemma poses is how we can reconcile what on the surface
teleology is a form of explanation that describes the way things are independently of
anyone’s thought about them. What was supposed to be useful about adopting this
model is that it provides a form of explanation that registers what is objective and
intrinsically valuable for something (the activities internal to a life form). Anyone
can come to see what is intrinsically good for some living thing just by coming to
know the species or life form it bears. But what is good here is an object of
perspective of theoretical thought and judgment, the facts about the life form are
prior and provide its measure. 37 This implies that the facts are independent of the
judgment that registers that good. And whatever the subject of the judgment wants
making features are independent of the thoughts and desires of the subject that
registers them, that is so difficult to map onto the teleology of practical deliberation
and reflection about action. In practical deliberation, one is concerned in the main
not with how things are, but with how one might make them, given what one is after
or what is wanted as an object of will. 38 This is why Aristotle says that practical
thought differs from theoretical thought in its end or aim, and not merely in its
objects (the latter distinction is logically secondary). Practical thought and practical
reason is thought and reason essentially aimed at action, not merely thought about
37
This fits with Anscombe’s famous account of theoretical knowledge in Intention. See Anscombe
(2000, 57).
38
Here we are talking about rational desire, but desire nonetheless.
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practical thought considers potential actions insofar as they are suitable to the
attainment of one’s ends. This is why practical thought cannot operate unless
Here we can notice a change in our use of ‘good’ that Foot does not account
for, and that is the change that we mark when we go from thinking of good as an
pursued. This sense of the word ‘good’ is untheorized by Foot, and it is mysterious
how it can enter into a schema of natural historical judgment. 40 We need to try to
In order to resolve the dilemma she faces, the ethical naturalist must be able
to show how these two seemingly opposed teleologies (the natural teleology of life
and the practical teleology of action) and these two seemingly different senses of
good (the good we can derive from an account of what simply is and the good as
practical goal) can be unified into one and the same account. That is, we need an
account of natural normativity that will show us how the relation between a general
judgment articulating some fact about a life form (a judgment about a fact that is
potentially known from the outside) and a judgment concerning a particular bearer
of that form in a particular situation, can take the form of a practical inference whose
conclusion is an action that exemplifies that very same form of life. 41 To comprehend
this, I take it, would be to comprehend the unity of the power of reason in a life
form. But that unity is only displayed when the very same material reality—say, the
ways.
39
This fact is shown very convincingly by Mueller (1979). See also Aquinas, ST I-II q. 8, a. 1, c.
40
Michael Thompson is aware of this. He writes, “We are thus, I think, as far as can possibly be
imagined from the category of intention or psychical teleology…” (2008, 78). Foot denies that we
are quite so far, as she argues “there is no change in the meaning of ‘good’ when it is used in
‘good roots’ and ‘good dispositions of the will’” (2001, 39).
41
I am indebted to conversations with Matthias Haase for coming to see the point in these terms.
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In the remaining part of this essay I am going to argue that we should take the
advice Foot offers in our epigraph seriously, and seek out Aquinas as a source of
insight into contemporary problems. To that end, I will argue that Aquinas’s
account of will and practical reason point us towards an acceptable resolution of the
dilemma the ethical naturalist faces by showing us that the supposed dichotomy
between nature and reason is a false one. First, I consider his theory of will. There
are two main respects in which his theory of will is useful to resolving our dilemma.
First, it is an account of the will as a natural inclination or tendency that has the
exemplification of form as its end. So the will has a natural standard of goodness or
badness, which is supplied by the life form as such. Second, the will is a rational
power, and its objects are determined through acts of practical reasoning. Thus we
can only attain our end (the exemplification of our form) through acts of reason. The
will then is a natural inclination towards the exemplification of form that necessarily
pursues its objects under the formal aspect of the universal good, through particular
this self-determination is not total. To see why it is not, I turn to Aquinas’s account
of practical reason. The starting points or first principles of practical reasons are the
natural ends that are constitutive of human life. Practical reason presupposes ends,
and our most general ends are constitutive of our form of life, and so shared in
common by all mature, sane members of the species. Aquinas thinks that we have
knowledge of them. Such knowledge is natural because all human beings have a
the knowledge is of the end qua end—we know these ends as objects to be realized,
and not as facts. This practical knowledge of our ends is compatible with the self-
necessary for the agent to order these ends, to determine the specific manner in
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which they will be attained, and by what means. On this account, self-determination
(and thus free choice) is in the space between the general ends and the particular
I conclude by pointing out that such a theory shows us a way to resolve our
dilemma, by showing us how we can conceive of rational powers along the same
basic model as all vital powers in a living thing: as ordered to the life form as such.
And the promise of such a resolution, and with it the collapse of one of modern
philosophy’s most sacred dichotomies, should be reason enough to give the theory
Aquinas, like Aristotle, argues that all living things are a self-sustaining system of
powers that functions to bring the living thing into being and to sustain its being.
The movement of any part of a living thing, at any particular moment, is necessarily
explained by reference to the movement of the whole thing towards a single end: the
coming to be, maintenance, or reproduction of that very form of life. Aquinas calls this
system of powers each tending to their own ends for the sake of the whole the
plant’s nature, and thus he speaks of there being a natural inclination in the plant that
explains each of the plants movements in terms of the single, unitary end for the
regulating power we can ascribe to the plant—it is not a kind of inner manager that
oversees the whole operation. Rather, natural appetite is simply the name Aquinas
gives to the system of essentially inter-related powers as a whole, what the ethical
naturalist calls the life form or species. We might call it a principle of explanation,
given that its role is to explain the movement and changes we see in the living thing
again, without it we simply cannot grasp what any movement of a living thing is.
42
DV q. 22.a.4
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Scholasticism, but we should resist. Notice that it is very difficult to deny the fact
that we need an account of that for the sake of which a natural movement is
Thompson’s point is that if we stay at the level of observation of the here and now
and do not take into account the determinate end towards which the vital, material
process is progressing, then we will in principle not be able to identify the kind of
process or change that is taking place. For the very same material process may be a
phase of growth in one life form, and reproduction in another. And we cannot know
whether what we see is growth or reproduction unless we know the end it serves:
is for the sake of the life form. When the sunflower leans towards the sun, when it
sinks its roots deep in the earth, when its cells split up and divide in such-and-such a
manner, all these activities occur for the sake of a sunflower life coming to be and
Aquinas invokes the concept of natural appetite (an inclination or tendency); it is not
enchanted idea of nature. Obviously plants don’t have desires or goals, and
Aquinas understood that as much as we do. In fact, he recognizes that plants don’t
43
Thompson (2008, 55).
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have a world at all. The attribution of appetite is made to account for the fact that
the movements of any part or process of a sunflower are all explained by reference
to a single, unifying end for the sake of which the system of powers itself comes to
be and operates: sunflower life. This shows that the concept in question primarily
Now animals do have feelings and desires, and thus Aquinas is happy to say
they have appetitive powers. In non-rational animals this is the power of perceptual
generally, which can be sub-divided into two distinct kinds, cognitive and
appetitive. Thus an animal is more than just an integrated system of powers that
operates for the sake of its own existence. An animal has external and internal
senses, and so it perceives a world distinct from itself and reacts to what it perceives
through its senses by moving itself through the world, in order to pursue some
things and avoid others. To have a perceptual powers is to possess a conscious form
of life.
under which one and the same material reality is apprehended qua object of that
their acts and objects. The act, operation, or exercise of a power is defined by its
formal object. For instance, the power of sight is defined by the object of its act, the
visible (or colored). The basic idea is that material things are cognized under some
specific formal aspect. For instance, the same material thing in the world, say a
as I see that it is red, it is an object of my visual power, which registers its visible
44
ST I q. 80, a.1, ad.2.
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which registers its audible properties. I cannot know that the bird is soft through
This diversity of formal objects is a diversity of genus, as these are all objects
of sensory powers. But the diversity between objects of cognition and desire is of a
higher order of generality: cognition and desire belong to diverse genera of powers,
under which particular species will be subsumed. Here the division is made
something stands to a power qua power of a living thing. Appetitive powers are
unified in virtue of their formal relation to the good. Cognitive powers, on the other
hand, are unified in virtue of their formal relation to truth (universal or particular).
There is much to be said here, but for our purposes it will be enough to stress
the basic differences between these formal relations between power and object. For
Aquinas, truth just is the name of the formal relation material things stand in with
related to material objects not as material objects, but in accordance with perceptual
the act of the cognitive and perceptual power directly, not to the material object of
the power—I have a true judgment or perception of a dog, not a true dog.
specific things in the world to itself, according to its own mode of apprehension, in
desire the animal is ordered or inclined to specific things in the world, as they are in
their material particularity. Here the goodness is not ascribed to the power in
exercise—it is not a good wanting—but rather to the object of the power: the thing is
45
A deaf person who claims to hear music through touch is not a counterexample to this claim.
Rather, I take it to prove the point. A bit of music is always a material reality (vibrations in a
medium) that can be accessible through other sense modalities. In the case of a deaf person who
can feel the vibrations and process that information in order to create music can be said to “hear”
it metaphorically. But her touch is not an act of hearing, it is an act of touch.
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wanted as good.46 For Aquinas, this is the essential meaning of good: that which is
the object of appetite, its terminus or that in which the wanting finds its fulfillment. 47
primarily, and only secondarily good as an object of intellect (i.e., considered under
apprehends, but reacts in accordance with what it perceives in a way that is good for
the whole animal. The sheep perceives the wolf as dangerous, and non-accidentally
so. An animal perceives particulars and is either inclined to seek or avoid them
insofar as they are good, not for the well functioning of any particular power, but for
the whole animal.49 It is because an animal goes after what it perceives as good for
itself that Aquinas says it has a perceptual appetite; and it is because we can
attribute this appetite to an animal that we can say that it acts. Though an animal has
a world and acts based on his interactions in the world, it is not up to the animal to
decide how to act, because it is not up to the animal whether it perceives any
46
Anscombe has a brief discussion of the distinction between intellect and appetite in Intention,
§40. I take her to be following Aquinas there. Though it is true that we sometimes speak of a
good desire (as when we say that the desire was good though what came of it was bad), we say
this only insofar as the object of the desire is truly good. But now we are making a judgment
about some object of desire, instead of actually desiring it!
47
SG 3.3 This is very different from what now passes as the “guise of the good” thesis. The
contemporary thesis is about propositional attitudes and the contents. For a critique of such a
view, see Boyle and Lavin (2008).
48
Though we can separate cognition and appetite these for the sake of distinguishing them and
noting the formal difference, but in actuality they are inseparable. For Aquinas, like Aristotle,
thinks that an animal does not apprehend anything without being inclined towards or away what
it has apprehended, and that an animal cannot inclined to anything in particular without
apprehension of it.
49
Aquinas entertains the idea that we needn’t attribute an appetitive power to animals, since each
individual power can be said to be a tendency to its own end that comes to be for the sake of the
whole. Aquinas responds that while it is true that each power, being of a certain form or nature,
has an inclination to its own object, there is still the need for an appetite following upon
apprehension by which the animal tends towards objects not just as suitable to a particular
power, but as suitable to the animal simply or as a whole. See ST I q. 80, a. 1, ad 3.
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For instance, if a sheep comes across a patch of grass, she will be inclined to
seek it, as a source of pleasure for itself (a relief of hunger). The sheep has a
directs her appetitive powers towards what is good for it. But the sheep is also
inclined to avoid what it perceives as dangerous. So if on the way to eat some grass
she encounters a wolf, the sheep will flee. The sheep cannot question whether she
ought to flee the wolf, nor can she decide to be brave and face it down. The reason is
that she cannot think of the particular harm (the wolf) in light of a general
conception of what is good for her (the good sheep life). 50 Though there is such a
thing as a good sheep life, the sheep herself neither knows it generally nor is
essentially guided by such knowledge in what she does. The sheep cannot acquire
general knowledge; it can only cognize and remember particulars, and use that
particulars, Aquinas argues that whether its life goes well is not really up to it.
because the animal is not able to develop the consciousness that other alternative
ways of going on are open to it, which is necessary in order for a decision to be
made. In order to develop that kind of consciousness one would need powers of
conceptual cognition and inference, which a mere animal lacks. To have conceptual
form of life.
Rational animals, like any animal, have a natural inclination towards its
good as a whole, and like lower animals this power is actualized through its
apprehension of things in the world. But Aquinas argues that a rational animal
relates to the world through the application of universal concepts, and thus it is
50
Aquinas has a sophisticated explanation of animal movement and sensitive appetite, both in us
and in lower animals. For present purposes I am simplifying the account. For further discussion,
see Pasnau (2002, chapters 6-7), and Miner (2009, chapter 1).
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them. Thus, Aquinas says that the will is inclined towards its objects under the
This means that a rational animal does not merely act on instinct, because it
rational creature to avoid it, does not determine it to flee. A rational animal can stand
in the face of certain death if he judges that a greater good than his own preservation
is at stake. And that is because a rational animal can put a certain distance between
itself and any of its particular judgments, perceptions, and desires. Part of what it
means to be self-conscious, I take it, is that one can reflect upon one’s own
operations, and assess whether the act is good or bad. So our decisions and our
inclinations can themselves become objects of rational reflection, and this implies
that our capacities are self-determined (or at least potentially so). For instance,
though I might immediately desire to eat the cake upon perceiving it, I can stop and
because of his skin color, but I can call these immediate judgments into question and
not just judge and desire in accordance with instincts; a rational animal needs a
reason to judge and to act. Consequently, its form of life is not determined, because
conceptual cognition is what makes possible a rational form of desire (i.e., the will).
Conceptual cognition brings with it, at minimum, the ability to apprehend particular
51
ST I-II, q. 1. a. 7. This is the parallel to the intellect regarding its object under the formality of
the universal truth, rather than particular, sensible truth.
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objects under general concepts, and thus under different descriptions that can be
inferentially related to other things he knows and pursues. For instance, whereas a
dog can only see a bit of meat on the table as food, and he is automatically inclined
to pursue it as such,52 a human being might see the same thing in a myriad of ways:
suitable vehicle of poison and the destruction of one’s enemy, and so on ad infinitum.
to other perceptions and other ends in a systematic way (or, it is at least potentially
so related). Therefore a rational animal is not inclined towards any particular thing
determined towards one end as opposed to another. An object of will, because the
means).53
Thus Aquinas argues that a rational animal must determine itself to move, in
cannot do this without relating its general conception of what is good to the
rational animal can be directly addressed to it, and an answer can be expected that
will appeal, not to some brute disposition or pre-determined inclination, but to the
52
Of course, a dog can be trained to avoid the food, against his instinct. Aquinas thinks this is
because the dog can remember the pain he associates with doing certain actions if he is
repeatedly punished for them. But the instinct to go after the food is still there, and its motive
force still very powerful. The impetus for food can only be overcome by memory of something
painful and to be avoided, such as bodily harm.
53
I discuss this idea of an object of will much more in another paper, “Knowledge of Action and
Knowledge of Human Form.” (unpublished manuscript, available for download at
http://jennfrey.wordpress.com/research)
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agent’s own understanding of his or her reasons for thinking, desiring, or acting as
she does. Thus Aquinas says that a rational animal determines its own inclinations,
and is free.54 And it also explains why he repeatedly insists that “goodness of will
depends on reason.”55
and therefore self-conscious and self-determined powers. This raises the question,
however, how such a power can be susceptible to natural norms. That is, if a
rational animal seeks its good in a critical, reflective, and self-determined way, then
is it not the sort of animal that can call the norms of its nature into question and hold
them up for rational scrutiny? Is it not thereby autonomous and free to decide for
itself what its good is? If nature decided such matters, a power of reason looks
utterly superfluous.56 How does this picture help us solve the problem facing the
ethical naturalist? The answer to this comes, I think, from reflection upon the nature
of practical reason.
We have seen that Aquinas believes that all living things act for the sake of a single,
unifying end: the exemplification of its life form, or nature. Human beings are living
things, and so the same is true for us, all of our properly human actions come to be
for the sake of living a human life. This end is not chosen by us, we are naturally
inclined to it. But our inclination to life is very general and basic, and it is up to us to
conception of human life. If we did not come into possession of such a general
conception, then we could not live a characteristically human life (a life of rational,
intentional action). Thus Aquinas takes it as a condition on acting for a reason that
the agent has knowledge of that its natural end: knowledge of specifically human
form.
54
DV q. 22. a. 4, ad 1. See also ST I-II, q. 1, a. 2.
55
ST I-II q. 19, a. 3.
56
This, of course, is Kant’s complaint at the beginning of the Groundwork (A: 395).
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agent know his end qua end. An animal knows it ends (the sheep knows that it is
fleeing the wolf qua danger), but this knowledge is not conceptual and general—it
does not have thoughts that are systematically connect to its other thoughts, because
they are positioned within a larger, inferentially related system. And so it neither
needs nor can have a reason to adopt one end over another.
A rational animal, on the other hand, must have a reason to flee or hold its
ground. Now this search for a ground is not confined to the space of the particular
circumstances. The search for a reason is grounded in its consciousness of its other
ends (general and particular), and how those ends hang together as a system of
ordered goods. One chooses the end, here and now, and the determinate means to
its achievement, in light of one’s other specific and more general ends. For instance,
I will not go to the store if it means I will miss class, and I’m the sort of person who
will not miss class, even it means I don’t eat and miss out on all sorts of other
goods of our life and a judgment about the particular in light of the general order.
Every action that is willed is willed in accordance with one’s sense of how the
particular fits into this general structure of ends—it is willed, as Aquinas would say,
under the aspect of the universal good. Without reference to that general structure,
the notion of a practically rational ground loses its intelligibility. 57 If I have no sense
of how what I do, here and now, fits into my general sense of how I ought to go on,
then my action is not rational, but based in some kind of sub-rational motivation. 58
57
Some philosophers are willing to give up on the notion of practical intelligibility altogether,
such as Setiya (2007: 63-65). I think to severe the notion of a reason from a robust conception of
intelligibility is a mistake, though I won’t argue for that here. I will return to the notion of
practical intelligibility, however, in the next section.
58
Of course, we are often motivated by sub-rational forces. But I do not see that as evidence
against Aquinas’s position, since Aquinas happily acknowledges such forces by allowing for
different forms of desire.
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particulars of the situation in which it finds itself. And when he chooses an end and
seeks to realize it, he knows that end in relation to this general system. But he also
live. In knowing his end, he knows what he is presently doing as a means to it, and
he knows this because he has reasoned that these are the means, here and now, to
attaining his end. He is realizing his will, and thereby realizing his life in accordance
this practical knowledge of one’s ends, and therefore of one’s life and actions.
These reflections are necessarily abstract and schematic, but my hope is that
they are sufficient to show that it is possible to understand the will as a power that is
naturally inclined to the human good in such a way that fits into the framework of
natural normativity. But since man’s end can only guide action through a rational
conception of it, we may still be inclined to think that such a conception could be
But Aquinas does not think that this general conception of the end is constructed in
accordance with formal principles of pure practical reason. He does not think that
“self-determination” goes all the way down. Some truths, he thinks we are naturally
apt to know, and some ends we are naturally apt to desire. Thus on his account of
practical reason, the determination of right reasons can never be given a formal
account. So let us now turn to his account of the principles of practical reason,
As we have seen, Aquinas argues that the will is a natural tendency towards the
exemplification of human life. But since appetite always follows cognition, the will
can only be moved by general, practical knowledge of this end. No human action is
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(and often is). Aquinas thinks that in coming to be a mature human being—i.e., one
raised in a community of other human beings, and thereby coming into the
necessarily comes into some such conception, and thus comes to act voluntarily, or
Now, having a general sense of how to go on, and bringing this general sense
to bear on this particular moment within the context of the rest of one’s life implies
that one has the capacity to order ends (and means to ends) and to adjust action and
desire in accordance with the ends given priority. This very idea of rational action
(the idea of ordering things to an end, and ordering these ends in light of an overall
Now Aquinas does think that practical reasoning takes place in accordance
philosophers don’t make use of a concept of first principle, 61 (it seems to be one of
those concepts that has simply fallen out of favor) but the concept is central to the
moral theories of Aristotle and Aquinas, and we need to lay hold of this if we are to
understand their theories of practical reason. For the purposes of this essay, I limit
myself to the task of showing that the concept of a first principle is necessary to the
59
I argue for this in much greater detail in “Knowledge of Action and Knowledge of Human
Form.”
60
Of course, not everyone thinks this. See Dancy (2004) for the opposing argument. I cannot
attempt a response to Dancy here, but for now I merely want the reader to notice that his
conception of a principle is very different from the one put forward in this essay.
61
For an interesting discussion of the reasons why, as well as an articulation of one path towards
a possible recovery, see MacIntyre (1990).
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notion of practical intelligibility that must underlie any theory of practical reason
that could possibly ground an account of ethical naturalism. I will not, however,
following Aristotle once again, thinks of first principles of reason as its “starting
points.” For practical reason, the starting points are the ends that constitute that for
the sake of which the power of practical reason comes to be and operates: the life
form as such. So, the starting points of practical reason—that towards which it
strives in its operation—are the ends constitutive of human life. Aquinas identifies
these ends: life, knowledge, friendship, family, political society, and so on. Aquinas
thinks that the human mind is naturally apt to know these ends as ends—as objects
of pursuit, and thus as good. And thus he says that the will is naturally inclined to
them.62
thought is necessary in order to see how such ends can be ordered and specifically
attained. Practical reason is reasoning towards the realization of a goal, and Aquinas
thinks it is obvious that some of our general goals are common to our nature as
human beings. Thus he rejects the idea that our most general ends can be objects of
choice themselves. And he rejects this because he does not seem to think that it is
to the idea of general ends or starting points. His thought seems to be that the very
or ground, such that some grounds must serve as the fixed parameters in which
62
I should note, in order to avoid confusion, that I am not saying that we are naturally apt to
know them because we are inclined to them. If we must insist on a logical priority, then
cognition is always prior (logically) to desire. Temporally, however, there is no priority. In
saying this, I reject Maritain’s highly influential reading of Aquinas.
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particular acts of practical reason are possible. These fixed parameters are not
merely formal by Aquinas’s lights—they are our natural ends (though as we shall
their truth, it is only insofar as they cannot seriously be doubted. Take, for instance,
the first principle of theoretical reason, which is known as the Principle of Non-
Contradiction.
(PNC) – It is impossible for the same thing to belong and not to belong to
the same thing, at the same time, and in the same respect. 63
For Aquinas, this is primarily a claim about the intelligibility of reality, and
secondarily a claim about our thought insofar as it is directed upon reality. 64 For
example, in order to doubt the truth of PNC, one would have to be able to conceive
of a particular instance in which the same attribute might, at one and the same time,
both belong and not belong to the same subject, in exactly the same respect. 65 And
one cannot conceive of this being the case. The idea is that one cannot truthfully
judge or assert that Socrates is both sitting and not sitting at the same moment, for
the simple reason that Socrates himself cannot be that way. The intelligibility of
thought presupposes the intelligibility of reality, of what is. The idea that we can
know the world presupposes that the world is such as to be known, that it contains a
63
The formulation comes from Aristotle. See Metaph. Iv, 6, 1001b13-14.
64
My discussion of these principles is heavily indebted to the work of Kevin L. Flannery, S.J., and
to several discussions with him. See Flannery (2001, chapter 6).
65
Metaph. IV, 3, 1005b19-20.
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Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
that we know through the senses, testimony, or any canon of evidence. Whatever
can be a thought must be in line with this principle (i.e., every thought must exclude
theoretical intelligibility in this sense: we do not have any hold on the nature of
The same sort of analysis must be given of the first principle of practical
reason.
The analogy is this: just as thought is not intelligible without the PNC, so too action
is not intelligible without the FPPR. This FPPR lays out the intelligibility of
one cannot judge that contradictory states of affairs equally hold at the same time in
the same respect, so also one cannot pursue what one considers, at the same time
and in the same respect, to be both good and bad. That is, it is impossible that
something can both be an object of will and not be an object of will at one and the
same time, while considered in the same respect, because one cannot apprehend a
goal as something that should be pursued and be avoided at one and the same
time.67 I cannot at the same time will to go to the store because I need food while I
will not to go there because I am tired. Practical reasons exclude their practical
66
ST I-II, q. 94, a. 2, c. bonum est faciendum et prosequendum, et malum vitandum.
67
Of course, in one moment I might see it as good in some way, at another moment as bad in
some other way, but only insofar as I attend to different aspects of the prospective action at
different times.
68
This is compatible with the fact that I can have contradictory desires. I just cannot hold in my
consciousness contradictory rational desires (i.e., acts of will).
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Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
The first principle of practical reason gives a determinate sense to the concept
reason for action if it speaks in favor of pursuing an action. It also gives us a sense of
Practical reasoning serves to preserve the good through the use of one’s own
powers, and to avoid what is harmful to any aspect of this good. FPPR contains
within it the idea that practical reasoning is goodness preserving, rather than truth
preserving.70
suggest that any rational animal would share this formal notion of practical
intelligibility. But the power of practical reason in operation always directs the
animal towards the good of its own form of life, and so any application of the
principle would depend on the ends that constitute “the good” in question. And
Aquinas thinks that reason is naturally apt to know these ends, and the will is
naturally apt to seek them. This is in keeping with his definition of a vital power in
general.
should expect if we divide the power of reason in the traditional way, according to
the difference in its ends or aims. Because the end of theoretical reason is to grasp
the truth of things, it makes sense that its principles are formal, since what is sought
is knowledge of things that transcends any particular perspective upon them (to the
greatest extent that this is possible for a finite agency). Indeed, the goal of theoretical
69
It is sometimes complained that philosophers with deeply Aristotelian sympathies often argue
by appeal to a notion of intelligibility that is itself not exactly transparent. For a nice articulation
of the worry, see Setiya (2007). I take this sort of complaint to be legitimate. However, the notion
of intelligibility is well worked out in Aristotle and those (like Aquinas) who follow him, and it is
far from indefensible.
70
This is an idea that Anscombe suggests but does not herself defend. See Anscombe (1989,
chapter 16).
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Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
reason is to transcend the subject and to comprehend the order of things. But this is
not true of practical reasoning. The work of practical reason is not to track the order
of reality, it is to create a practical order and to realize that order in reality. Its
objects are not things that already exist, but ends that are wanted. The goal of
practical reason is to preserve or attain what is wanted (or good). Now, if we define
the good in terms of the end, then it makes sense to think that practical reason will
be governed by species specific norms, because the ends of a life form just are what
define or constitute the life form. Therefore the ends that constitute the good that is
to be pursued and avoided can never be formal. Practical reason aims at human
So the norms are natural. Let me briefly say something about the manner in
which Aquinas thinks we apprehend them: qua good. To apprehend an end qua
to realize in action. Now, Aquinas says that our practical intellect is naturally apt to
know the ends that constitute the first principles of practical reason, and to know
them as ends, or as good. It is not by accident that every human community has
knowledge, friendship, and the like. We are naturally apt to know and seek these
goods. And we come to know them not through observation or inference, but just in
virtue of coming to be human beings, and coming to live the dimension of human
life to which that particular good pertains. We know them, as it were, from inside.
Thus, the grasp of these activities qua good does not require special instruction,
human life. Aquinas calls this sort of knowledge connatural, noting that we are
seek these ends in general; we only deliberate about whether to seek any one of
them in any particular instance of action. These ends are the fixed, unchanging
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Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
limits of practical reasoning. Something like this view can also be found in Aristotle.
Consider the opening of the Metaphysics, where Aristotle famously proclaims that
Aristotle recognizes that though they are obviously useful and we cannot get on
without them, we revel in the exercise of our senses for its own sake, precisely
because through them we attain knowledge, which we also value for its own sake
and naturally desire. Thus the delight we take in our senses is a kind of
demonstration (for one who came somehow to doubt it) that knowledge is one of
own nature—though imperfect and incomplete—is knowledge gained from the inside,
just in virtue of being a man and living a human life. Aquinas argues that our
knowledge of all the basic human goods is connatural in this way: we know these
Obviously, there is much more to be said about Aquinas on the will and practical
reason. I have only said enough here to show how we might resolve the dilemma
that ethical naturalists face. Remember that we began the second half of this essay
with the acknowledgement that we did not know how it was possible to be an
ethical naturalist, because we did not understand how practical and natural
normativity could be reconciled. We came to see that the ethical naturalist must be
able to show how the natural teleology of life and the practical teleology of action,
71
Metaph. I, 980a21.
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Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
and the two senses of good that come out of them (the good that corresponds to
what a thing is, and the good as goal or end) can be reconciled with one another. We
are now in a position to say how this is at least possible. If Aquinas’s view can be
made defensible, then we can say that there are goods that are objective because it
how they ought to be integrated as a whole. At the same time, these goods are
objects of a distinctively practical apprehension that orders the will to seek them.
Such goods depend on what a human being is, but they are known by human beings
as goals or ends, as their typical way of coming to mind is not in the form of some
abstract list, the members of which are known by mystical intuition, but in the
course of thinking about concrete situations of human life with a view to their
fulfillment. An alien anthropologist would not know them as ends or think of them
with a view to realizing them, but nevertheless could come to know them by being
do not need to show how facts about human beings can enter its structure as
knowledge of their most basic goods—define the starting points and limit of that
structure itself, but in a practical mode. Consequently, we do not now have to show
how knowledge of human life form enters into practical thought. On the account
provided here, we reason from our general conception of this life, which is an
incomplete practical knowledge of our own nature, down to particular actions that
are ordered to its more attainment. Practical thought itself is structured by and
ordered to human goodness, so there is no question of how it can fit into it.
Of course, I have not argued for the truth of Aquinas’s theory. My goal was
far more modest. I have only articulated a theory that demonstrates how it is
possible to be an ethical naturalist. The potential the theory holds for forging a
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Jennifer A. Frey How To Be An Ethical Naturalist Draft May 2014
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