Social Morality in Mill [DRAFT]
Piers Norris Turner1
[PLEASE DO NOT CITE WITHOUT PERMISSION – Final version forthcoming in Public Reason in Political
Philosophy: Classic Sources and Contemporary Commentaries, eds. Piers Norris Turner and Gerald Gaus
(Routledge)]
INTRODUCTION
A leading classical utilitarian, John Stuart Mill is an unlikely contributor to the public reason
tradition in political philosophy. To hold that social rules or political institutions are justified by
their contribution to overall happiness is to deny that they are justified by their being the object of
consensus or convergence among all those holding qualified moral or political viewpoints. For the
utilitarian, the existence of consensus or convergence might be evidence of a tendency to overall
happiness and help to establish conditions of security and coordination necessary for it, but it does
not constitute the fundamental choiceworthiness of the rules or institutions. In this chapter, I do
not mean to challenge that baseline utilitarian understanding of Mill’s moral and political
framework. But I do want to explore the surprising ways in which he nevertheless works to
accommodate the problems and insights of the public reason tradition, and the extent to which he
makes arguments that can help those working within that tradition. This is important not only for
1
Associate Professor of Philosophy and (by courtesy) Political Science, Ohio State University
a richer understanding of Mill’s utilitarian ethics and how consequentialists might address
themselves to the public reason project, but also for those interested in the ongoing significance of
Mill’s liberal principles after the turn to public reason in the work of Rawls, Larmore, Gaus, and
others.
In what follows I try to show how Mill’s utilitarian theory incorporates the claim that the
demands of social life require a publicly accepted set of normative expectations to govern
judgments about when one has met one’s obligations and, relatedly, about the appropriateness of
blame or punishment. For Mill, such a social morality properly regulates these judgments even if
it is not ideal, that is, even if it is not the set of rules the adoption of which would collectively
maximize utility. Importantly, however, social morality is not static. It shapes our collective
existence by defining the proper bounds of our practices of accountability even as it evolves over
time. And, as we shall see, Mill identifies principles of public reason that he believes should guide
the development of social morality.
Ultimately, I believe, Mill’s account of social morality remains consistent with his act
utilitarian commitment that what makes actions fundamentally choiceworthy is their expediency
or contribution to overall happiness (whether or not they are blameworthy). But seeing how Mill’s
discussion of social morality fits within his overall ethical theory helps to resolve debates about
passages in which he seems to endorse an account of moral right and wrong at odds with act
utilitarianism. With this unified account of Mill’s ethical theory on the table, we can explore the
extent to which it allows him to offer arguments about the shape of our social practices and political
institutions in the spirit of public reason liberalism, and not always by direct appeal to the principle
of utility.
In section 2, I begin to examine those places where Mill expresses the need for social
morality—publicly recognized social rules by which we appropriately hold each other
accountable—and addresses what is required to maintain its integrity as it develops over time. It
is hard to imagine anyone denying the value of such a social morality, but that is partly the point.
Because act utilitarianism is commonly caricatured as failing to respect social rules as the
appropriate governors of our actions, it is worth seeing how they are treated in a fully developed
“sophisticated” act utilitarian system such as Mill’s. 2 In fact, he makes a great deal of the fact that
maintaining the integrity of publicly recognized social rules is necessary for cooperative society
to exist at all.3 This justifies a general commitment, on one hand, to restrain our own actions in
accordance with those social rules and, on the other, to appeal to them in assigning blame or
punishment to others. Mill not only explores the historical circumstances necessary for stable
social rules to persist—most interestingly, in a non-despotic, liberal system—but also argues that,
except in exceptional cases, individuals’ practical deliberation and judgments of holding each other
accountable should extend no further than those social rules. 4
1. EXPEDIENCY AND BLAMEWORTHINESS
2
Peter Railton (1984) introduced the label “sophisticated” for consequentialist moral theories that
distinguish between the standard of correctness and the appropriate decision-procedure for human
conduct.
3
For elaboration of this point, see Turner (2015a), 728ff.
4
See his discussion in “Taylor’s Statesman” (1837), CW XIX.640, co-authored with George
Grote. Mill citations marked by “CW [volume #.page #]” refer to the Collected Works.
It is important to appreciate a complication for interpreting Mill’s overall ethical theory: that he
sometimes uses the terms “morality,” “moral,” and the like to refer to the utilitarian standard of
what makes actions fundamentally choiceworthy (namely, their expediency or actual contribution
to overall happiness) and other times uses those same terms to refer to a standard of
blameworthiness that does not involve direct appeal to the principle of utility (but rather to whether
a person has met social expectations in deciding to act).
There are numerous examples of the first sense of “morality” in Mill’s work. In chapter 2 of
Utilitarianism he summarizes his moral theory this way:
According to the Greatest Happiness Principle… the ultimate end, with reference to and for
the sake of which all other things are desirable (whether we are considering our own good or
that of other people), is an existence exempt as far as possible from pain, and as rich as possible
in enjoyments, both in point of quantity and quality… This, being, according to the utilitarian
opinion, the end of human action, is necessarily also the standard of morality; which may
accordingly be defined, the rules and precepts for human conduct, by the observance of which
an existence such as has been described might be, to the greatest extent possible, secured to all
mankind; and not to them only, but, so far as the nature of things admits, to the whole sentient
creation. (CW X.214; emphasis added)
In other passages he similarly refers to “the principle of utility—which is a theory of right and
wrong” (“Sedgwick’s Discourse” (1835), CW X.71) or notes in passing that “right means
productive of happiness, and wrong productive of misery” (“An Examination of Sir William
Hamilton’s Philosophy” [Hamilton] (1865), CW IX.456). In a summary of the argument of chapter
2 of Utilitarianism he writes, “The only true or definite rule of conduct or standard of morality is
the greatest happiness” (Diary (1854), CW XXVII.663).
These and related passages place Mill within familiar utilitarian territory, according to which
(ignoring some intramural disputes) actions are morally right insofar as they maximize overall
utility, and wrong to the extent that they fail to do so.
But Mill then goes on to make rather different claims, appealing to a second sense of “morality”
that is specifically about moral obligation or duty. He argues that moral duty is defined by those
standards of conduct to which competent individuals are appropriately held accountable in any
given state of society, even if reasons of expediency or overall utility speak against actually holding
someone accountable in a particular case. To fail to fulfill one’s moral duties in this sense is to
make oneself the appropriate target of blame or punishment:
No case can be pointed out in which we consider anything as a duty, and any act or omission
as immoral or wrong, without regarding the person who commits the wrong and violates the
duty as a fit object of punishment… even if there are preponderant reasons of another kind
against inflicting the suffering. (James Mill’s Analysis of the Phenomena of the Human Mind
[Analysis] (1869), CW XXXI.241-2)
We do not call anything wrong, unless we mean to imply that a person ought to be punished in
some way or other for doing it; if not by law, by the opinion of his fellow creatures; if not by
opinion, by the reproaches of his own conscience. This seems to be the real turning point of
the distinction between morality and simple expediency… Reasons of prudence, or the interest
of other people, may militate against actually exacting it; but the person himself, it is clearly
understood, would not be entitled to complain. There are other things, on the contrary, which
we wish that people should do, which we like or admire them for doing, perhaps dislike or
despise them for not doing, but yet admit that they are not bound to do; it is not a case of moral
obligation; we do not blame them, that is, we do not think that they are proper objects of
punishment.” (Utilitarianism (1861), CW X.246; emphasis added)
In these passages, moral wrongness is identified with blameworthiness, that is, with the failure
to do that for which the agent is appropriately held accountable. Mill here seems to reject the
utilitarian standard of moral wrongness because, surely, one is not always a fit object of blame or
punishment for failing to maximize utility. Though some have wondered whether he thereby gives
up his utilitarianism or holds two conflicting standards of moral rightness, I believe the difficulty
here is merely verbal. We should not get hung up on Mill’s use of “moral,” but rather accept that
he has identified two non-conflicting categories of evaluation that are both always relevant and
important to the assessment of any action. In the first category, we evaluate actions according to
whether they are expedient or conducive to overall happiness. In the second, we evaluate actions
according to whether they meet or exceed the expectations we have of each other (whatever
happens to be expedient), which we may enforce against each other through practices of blame or
other punishment. 5 This is the standard of social morality, the shared set of normative expectations
5
Peter Railton (1988, 2005) makes a similar distinction between what is expedient and what social
morality requires, and similarly argues that both categories of evaluation are always applicable.
For Railton, the fundamental level of evaluation for acts, practices, or institutions is their
among competent persons in a given state of society. 6 These shared normative expectations
comprise those “acts which the general experience of life… warrant us in counting upon”
(Analysis, CW XXXI.241) and define our moral duties. For most cases, they are encapsulated by
general practical rules.
I want to emphasize three features of making this distinction between expediency on one hand,
and social morality or duty or blameworthiness on the other. First, for Mill, the failure to perform
an action that maximizes utility need not count as a failure of moral duty. An action might be
inexpedient yet still not open someone to censure, given current social expectations. Conversely,
one might fail one’s moral duty even when one has maximized utility. One might act rashly or
otherwise fail to meet social expectations, yet perform the expedient action. 7
Second, the distinction allows for a domain of supererogatory action in which an individual
exceeds shared normative expectations. These actions Mill calls “meritorious,” and are part of a
contribution to the overall good, which he calls fortunateness instead of expediency. He then
introduces another standard: “The concept of ‘moral rightness’ comes to the consequentialist
already well-embedded in our moral thought and practice. If ‘morally right’ meant ‘optimal from
a moral point of view,’ ‘morally wrong’ would naturally be ‘less than optimal from a moral point
of view’. But moral wrongness goes with notions of blameworthiness, condemnation, resentment,
and guilt, and we do not typically dispense these for mere suboptimality” (2005, 495). This
standard, of social morality, is relative to social expectations in a given place and time.
6
For the articulation and defense of social morality as shared normative expectations, see Gaus
(2011), (2015), and (2016).
7
For discussion of these points, see Turner (2015a).
“region of positive worthiness” in which “there is an unlimited range of moral worth, up to the
most exalted heroism, which should be fostered by every positive encouragement, though not
converted into an obligation” (Auguste Comte and Positivism (1865), CW X.337, 339).
Third, for Mill, a person’s blameworthiness is not a matter of whether it would be expedient to
blame that person in the particular case. As he indicates in both passages quoted above, a person
can be blameworthy even if reasons of expediency or prudence ultimately tell against holding the
person accountable. What matters is that the person is a “fit” object of punishment and “would not
be entitled to complain” if he or she were held to account. 8 For Mill, our deserving blame or
punishment comes down to “our knowledge that punishment will be just: that by such conduct we
shall place ourselves in the position in which our fellow creatures, or the Deity, or both, will
naturally, and may justly, inflict punishment upon us” (Hamilton, CW IX.461). Mill emphasizes
that the word “justly” here does not refer directly to what is expedient or right, but (as I read him)
to the idea that others may rightfully decide this matter. It is true that, for Mill, any allocation of
rightful authority over certain matters will ultimately be justified by expediency. But with respect
to blameworthiness, his point is that others may rightfully judge a member of the community in
light of shared normative expectations. Within those limits it is under others’ discretion whether
to blame or otherwise punish that person. Thus, even if they hold that person accountable when
8
To my mind, Mill’s clarification that a person may be a fit object of punishment “even if there
are preponderant reasons of another kind against inflicting the suffering” tells decisively against
the indirect “sanction utilitarianism” reading of his account of the rightness of actions. Mill gives
us two direct standards.
doing so would not be expedient, it remains the case that their holding him or her to account was
rightful.
One thought justifying this claim about our rightful authority to hold each other accountable is
that any person “must recognise it as not unjust that others should protect themselves against any
disposition on his part to infringe their rights” (Ibid.). Social morality is constituted in part by the
shared standards that define rights and their corresponding obligations, and we are well placed to
hold others accountable for violations of our own rights even if we might choose not to do so in
certain cases and even if doing so might be inexpedient in certain cases.
In a passage unpublished in his lifetime, Mill makes the point that if there were no need to
enforce shared expectations, there would be no need for “morality” in the second sense – of social
morality. 9 Writing to Harriet, his future wife and collaborator, and praising her “higher nature,” he
remarks that:
If all persons were like these [i.e., had higher natures], or even would be guided by these,
morality might be very different from what it must now be; or rather it would not exist at all
as morality, since morality and inclination would coincide. If all resembled you, my lovely
friend, it would be idle to prescribe rules for them. By following their own impulses under the
guidance of their own judgment, they would find more happiness, and would confer more, than
by obeying any moral principles or maxims whatever… Where there exists a genuine and
9
My reading does not depend on this passage. But, following Robson, who included this piece in
the Collected Works, I believe we can treat it as providing some clue to Mill’s thinking, when
viewed in light of other evidence.
strong desire to do that which is most for the happiness of all, general rules are merely aids to
prudence, in the choice of means; not peremptory obligations.
…All the difficulties of morality in any of its branches, grow out of the conflict which
continually arises between the highest morality and even the best popular morality which the
degree of development yet attained by average human nature, will allow to exist. (“On
Marriage,” CW XXI.39; emphasis added)
Note that in the imagined case, in the absence of practices of blame and punishment, the principle
of utility would still provide a standard by which to praise our inclinations and decisions.
The rest of this chapter grapples with those passages in Mill that bear on the need for social
morality, how it changes, and its place within his overall ethical theory. I do not claim to provide
a complete account of this part of Mill’s ethical theory, but I hope to introduce the main features
of it and (given the aims of the present volume) highlight a variety of his writings that are not often
given their due. Why do we need social morality? Is it, in any interesting sense, independent of the
principle of utility? What should I do when social morality conflicts with my understanding of
what utility requires? In trying to answer these questions, I hope to show that Mill demonstrates a
remarkable sensitivity to the demands of public reason.
2. PRIVATE CONFLICT AND A “COMMON SYSTEM OF OPINIONS”
We have already noted that the rules of social morality are relative to a given “state of society.”
This is due in part to the fact that states of society differ in the prevailing beliefs, including moral
beliefs, of those living in them:
What is called a state of society, is the simultaneous state of all the greater social facts or
phenomena. Such are, the degree of knowledge, and of intellectual and moral culture, existing
in the community, and in every class of it; the state of industry, of wealth and its distribution;
the habitual occupations of the community; their division into classes, and the relations of those
classes to one another; the common beliefs which they entertain on all the subjects most
important to mankind, and the degree of assurance with which those beliefs are held; their
tastes, and the character and degree of their aesthetic development; their form of government,
and the more important of their laws and customs. The condition of all these things, and of
many more which will readily suggest themselves, constitute the state of society or the state of
civilization at any given time. (A System of Logic [Logic] (1843), CW VIII.911-12; emphasis
added)
For Mill, then, the rules of social morality vary not only with different economic and political
circumstances, but according to what the people in a given time and place commonly value and
believe. This is important because Mill believes that, if society is to exist at all and to persist over
time, it requires a widely-accepted set of opinions to serve as a public standard.
The problem, as Mill sees it, starts with a Hobbesian state of nature marked by “private
conflict” and devoid of the cooperative benefits that social morality and law allow:
A rude people though in some degree alive to the benefits of civilized society, may be unable
to practice the forbearances which it demands: their passions may be too violent, or their
personal pride too exacting, to forgo private conflict, and leave to the laws the avenging of
their real or supposed wrongs. (Considerations on Representative Government [CRG] (1861),
CW XIX.377) 10
In Mill’s account of social development, the path to “civilized” society—that is, to a
cooperative society within which most individuals are motivated to compromise and to engage in
joint endeavors 11—is uncertain. In fact, again echoing Hobbes, he suspects that cooperative society
cannot get a foothold without the help of some external power, such as a powerful despot, to begin
to train individuals to work together.
…a people in a state of savage independence, in which every one lives for himself, exempt,
unless by fits, from any external control, is practically incapable of making any progress in
civilization until it has learnt to obey. The indispensable virtue, therefore, in a government
which establishes itself over a people of this sort is, that it make itself obeyed. To enable it to
do this, the constitution of the government must be nearly, or quite, despotic. (Ibid., 394)
10
For Mill’s Hobbesian moments: “Civilization” (1836), CW XVIII.117–47; Chapters on
Socialism (1879), CW V.749; and “Use and Abuse of Political Terms” (1832), CW XVIII.10–11.
11
A “civilized” society is marked by: (1) “a dense population, therefore, dwelling in fixed
habitations,” (2) “agriculture, commerce, and manufactures,” (3) “human beings acting together
for common purposes in large bodies, and enjoying the pleasures of social intercourse,” and (4)
“the arrangements of society, for protecting the persons and property of its members, are
sufficiently perfect… to induce the bulk of the community to rely for their security mainly upon
social arrangements” (“Civilization,” CW XVIII.120).
Individuals, he suggests, must initially be forced to cooperate in order to overcome “the difficulty
of inducing a brave and warlike race to submit their individual arbitrium to any common umpire”
(Logic, CW VIII.921).
Part of the significance of these passages is that Mill seems to accept the basic Hobbesian point
that the state of nature is the worst state. Even living under a despot is better, because at the very
least it lays the groundwork for future possible improvements (“Civilization,” CW XVIII.120).
Unlike Hobbes, however, Mill argues that eventually individuals who have developed cooperative
tendencies will no longer require a despot to force cooperation. At that point, the despot should
make way for democracy and the vision of liberal society defended in On Liberty and The
Subjection of Women. But the need for a public standard or “common umpire” will always remain:
[S]ocial existence is only possible by a disciplining of those more powerful propensities, which
consists in subordinating them to a common system of opinions. The degree of this
subordination is the measure of the completeness of the social union, and the nature of the
common opinions determines its kind. But in order that mankind should conform their actions
to any set of opinions, these opinions must exist, must be believed by them. And thus, the state
of the speculative faculties, the character of the propositions assented to by the intellect,
essentially determines the moral and political state of the community. (Logic, CW VIII.926)
Without recognized general rules of social morality, we would be left with “perpetual
quarrelling” (Letter to Grote (1862), CW XV.762) and the threat of social dissolution: “The people
for whom the form of government is intended must be willing to accept it; or at least not so
unwilling, as to oppose an insurmountable obstacle to its establishment” (CRG, CW XIX.376). 12
Consistent with significant variations among social moralities and legal institutions in this
social development, Mill identifies three general historical requisites for any “society that has
maintained a collective existence” (Logic, CW VIII.920), each of which concerns the dispositions
and beliefs of the people living in those societies. The first requisite he identifies is a “system of
education” that, among other things, is able to carry on training each person in “restraining
discipline,” i.e. “that habit… of subordinating his personal impulses and aims, to what were
considered the ends of society” according to some shared or public standard (Ibid., 921). It calls
for compromise and deference to a common umpire in the form of recognized social or political
rules and authorities. This is a negative requisite insofar as it involves mainly forbearance on the
part of each individual.
The second requisite for social stability is more positive, namely, the existence of some
unifying principle or object that grounds a “feeling of allegiance, or loyalty.” This may be
generated by different things, such as a charismatic leader or national identity. In developed, non-
12
In some passages, Mill speaks directly to the need for social morality, and in others he speaks
to the need for law or government. For our purposes, I am glossing over that distinction because
he distinguishes them mainly in the means they employ and not in their basic justification. This,
one might note, is true also of Mill’s liberty principle, which applies to both government and social
authority, and concerns both “legal penalties” and “the moral coercion of public opinion” (CW
VIII.223). I here leave aside the question of which social expectations should be enforced through
formal mechanisms and which not.
despotic societies Mill hopes that this loyalty could “attach itself to the principles of freedom and
political and social equality, as realized in institutions which as yet exist nowhere…” (Ibid., 922).
This suggestion expresses an idea at the very core of liberalism, that what could unite a people is
equal respect for each other’s individuality.
The third general requisite for social stability is, he writes, “a principle of sympathy… a feeling
of common interest among those who live under the same government” (Ibid., 923). This is not
the same as the feeling of allegiance to a leader or ideal. It is the feeling of solidarity to each other,
“that they are one people, that their lot is cast together” (Ibid., 923). It supports community and
mutual concern, and opposes both invidious distinctions and free-riding. This is what Mill
elsewhere seems to mean by “sociality” (Letter to Ward (1859), CW XV.650).
None of these conditions is sufficient on its own for social stability; remove any of them and
the problem of conflicting propensities and judgments re-emerges. But together these conditions
allow for the existence of “public authorities” in the form of stable laws or social rules, functioning
tribunals, and “an organized force of some sort to execute their decisions” (Ibid., 920).
Undoubtedly, there will still be disagreements, but these will occur against a backdrop that allows
for a stable collective existence grounded in shared feelings, ideals, and procedures.
Not surprisingly, Mill also argues that the development of social morality and legal institutions
will require taking account of people’s happiness. But the present point is that the three requisites
make possible a kind of “fellow-feeling” around a shared set of beliefs and values, which—because
of that very fellow-feeling or coming together—constitute the standard by which we may hold
others accountable:
I feel conscious that if I violate certain laws, other people must necessarily or naturally desire
that I shd be punished for the violation. I also feel that I shd desire them to be punished if they
violated the same laws towards me. From these feelings & from my sociality of nature I place
myself in their situation, & sympathize in their desire that I shd be punished; & (even apart
from benevolence) the painfulness of not being in union with them makes me shrink from
pursuing a line of conduct which would make my ends, wishes, & purposes habitually conflict
with theirs. (Letter to Ward, CW XV.650)
In his own way, then, Mill introduces some of the basic elements of the public reason tradition:
that people each have an interest in submitting their private judgments to a social morality (or other
public authority); that a certain discipline of habit and thought is required to maintain that social
morality; and that social morality appropriately governs our practices of holding each other
accountable.
It will be wondered what Mill would say about a social morality that is not optimal from the
utilitarian perspective. Consider a case in which a different a set of normative expectations, if
widely accepted, would in fact be more expedient (and are known by some to be so) than the
current social morality, taking people as they are. As I understand the picture, Mill is committed
to the view that the less optimal social morality, if it is in place, must nevertheless provide the
basis for our practices of holding each other accountable. This is because the function of social
morality is to solve the problem of private conflict. Without a solution to this problem, there would
be no stable society at all. And to solve it, social morality must be publicly accessible and widely
shared. 13
Social morality grants individuals the right to enforce (through practices of blame or
punishment) the expectations contained in the common set of opinions. Others may enforce those
rules against you (and vice versa), and whether to do so is left to their discretion ultimately because
they have a right to self-protection. As noted before, they might err in the sense that exacting a
punishment might not be expedient in a given case, but so long as they are enforcing social morality
you would not be entitled to complain. Whether punishment is fitting—whether you have done
something “wrong” in that sense—is only a matter of whether others may rightfully blame or
otherwise punish you, given social morality. 14 If the expectations licensing these judgments were
not widely shared, they would neither solve private conflict nor maintain social stability.
The reliance on common opinion does not mean, however, that the existing social morality is
beyond criticism: “…bad as well as good institutions create moral obligations; but to erect these
into a moral argument against changing the institutions, is as bad morality as it is bad reasoning”
(“Newman’s Political Economy” [Newman] (1851), CW V.445). One important theme in Mill’s
work is that the progressiveness of social morality depends on the availability of some external
standard by which to criticize prevailing social morality. Following Bentham, this is one of his
13
I will address this issue at greater length in the final section.
14
There will of course be disagreements about the content of social morality, its interpretation,
and about the efficiency of each of us enforcing it and what enforcement measures are justified.
These problems give us reason to introduce systems of adjudication and enforcement associated
with what H.L.A. Hart called “secondary rules.”
main arguments for utilitarianism and against the intuitionism of Whewell and others. Although
intuitionists might be able to offer a social morality, they cannot provide a standard—at least not
a publicly accessible one—by which to revise social morality: “The contest between the morality
which appeals to an external standard, and that which grounds itself on internal conviction, is the
contest of progressive morality against stationary—of reason and argument against the deification
of mere opinion and habit” (“Whewell on Moral Philosophy” [Whewell] (1852), CW X. 179). He
argues in similar terms that the feelings associated with social morality, such as guilt and
resentment, should be shaped over time by the principle of utility:
We are as much for conscience, duty, rectitude, as Dr. Whewell. The terms, and all the feelings
connected with them, are as much a part of the ethics of utility as of that of intuition. The point
in dispute is, what acts are the proper objects of those feelings; whether we ought to take the
feelings as we find them, as accident or design has made them, or whether the tendency of
actions to promote happiness affords a test to which the feelings of morality should conform.
(Whewell, CW X.172)
In appealing to the principle of utility, then, Mill the reformer advocates for changes to the
social morality he shares with others. But he does not believe that blameworthiness—and moral
“wrongness” in that sense—can be divorced from social morality. Rather, those judgments must
evolve with social morality over time:
[I]nasmuch as every one, who avails himself of the advantages of society, leads others to expect
from him all such positive good offices and disinterested services as the moral improvement
attained by mankind has rendered customary, he deserves moral blame if, without just cause,
he disappoints that expectation. Through this principle the domain of moral duty, in an
improving society, is always widening. When what once was uncommon virtue becomes
common virtue, it comes to be numbered among obligations, while a degree exceeding what
has grown common, remains simply meritorious.” (Auguste Comte and Positivism, CW X.338;
emphasis added)
Here is perhaps Mill’s clearest statement that moral duty develops over time with changes in shared
social expectations. In an “improving society” we can expect more of each other, if we educate
our habits and thoughts at the same time that we work to reform our rules and institutions.
Three clarifications are called for before we consider Mill’s account of the way we should
engage each other within social morality. First, although Mill believes (following Bentham) that
one advantage of the principle of utility itself is its public accessibility, he also recognizes that it
is controversial. As we shall see, he therefore introduces mid-level principles that he believes can
win support not just from those who share his views, but from anyone who is sensitive to the main
lessons of history.
Second, although I have sometimes referred to social morality as a system of rules, the shared
normative expectations need not all be captured by rules. For Mill, the rules of social morality are
general rules not expected to cover every circumstance. Rather, he emphasizes that there are cases
in which individuals are rightly held accountable for failing to violate a general rule, and the
individual “cannot discharge himself from moral responsibility by pleading that he had the general
rule in his favor” (“Taylor’s Statesman,” CW XIX.640):
What should we say to a physician, who communicated an agonising piece of family
intelligence, in reply to the inquiry of our sick friend, at a moment when the slightest
aggravation of malady threatened to place him beyond all hope of recovery? In a case like this,
surely there is no man of common sense or virtue, who would think for a moment of sheltering
himself under the inexorable law of veracity, and refusing to entertain any thought of the
irreparable specific mischief on the other side. (Ibid.)
Some thorny cases involve conflicting general rules, but sometimes they involve only
“peculiarities of circumstances” (Utilitarianism, CW X.225). In what follows, I will sometimes
refer to social morality as a set of rules, but it should be understood that for Mill the rules of social
morality may have exceptions that are also part of our shared expectations.
Third, the social rules might themselves express normative expectations that vary for
individuals according to differences in position, influence, or capacity:
There are times when the grandest results for the human race depend on the public assertion of
one’s convictions at the risk of death by torture. When this is the case martyrdom may be a
duty; & in cases when it does not become the duty of all it may be an admirable act of virtue
in whoever does it, & a duty in those who as leaders or teachers are bound to set an example
of virtue to others, & to do more for the common faith or cause than a simple believer.” (Letter
to Young (1867), CW XVI.1328)
The fact of shared normative expectations does not imply that the expectations for each of us are,
in all ways, the same. Unfortunately, Mill does not develop this point in detail.
In general, then, the moral or social reformer has two projects: first, to propose new general
rules of social morality for individuals as they are currently constituted; second, to help educate
individuals to become capable of inhabiting an even better social world.
As we shall see, Mill argues that the first reform project must begin by critically evaluating
prevailing social morality. The main practical consideration is not where we start, but whether we
have the means to progress from where we are. Above all, Mill argues, in a civilized society, the
social conditions allowing for criticism and learning through experience must be protected against
interference: “the source of everything respectable in man either as an intellectual or as a moral
being,” he writes, “[is] that his errors are corrigible. He is capable of rectifying his mistakes, by
discussion and experience” (On Liberty (1859), CW XVIII.231). Because revising our beliefs is
“predominant, and almost paramount, among the agents of social progression,” Mill concludes
that “the order of human progression in all respects will mainly depend on the order of progression
in the intellectual convictions of mankind” (Logic, CW VIII.926, 927). Ensuring the conditions
for moral improvement through “discussion and experience” thus becomes the leading theme of
his moral and political philosophy, and shapes his account of the practice of public reason.
3. THE PRACTICE OF PUBLIC REASON
So far, then, we have seen that Mill regards social morality as more than a merely sociological or
descriptive phenomenon. Social morality must govern much of our moral decision-making,
specifically our holding each other accountable. Mill accepts a version of the practical problem
that animates the public reason tradition, the problem of conflicting private judgments, and the
corresponding need to establish a publicly justified standard or procedure by which to regulate our
social and political lives together.
But how are we supposed to accommodate disagreement about what social morality should be,
and how can we revise social morality, while maintaining its integrity? This is the question of the
practice of public reason, in which social morality is an ongoing construction project for a
community. 15 It is particularly important for Mill because he argues that we are never justified in
believing that our current social morality—even if it is unanimously accepted—is the best it could
be. 16
As I suggested at the end of the last section, Mill’s approach to the practice of public reason
begins with the observation that at any given time and place there are certain “received opinions.” 17
These, he seems to say, must be our starting points. But what emerges from his discussion of public
reasoning is that he is less concerned with the specific content of prevailing beliefs than he is with
preserving the conditions necessary for the effective criticism of those beliefs. Unlike some public
reason views, for Mill it is not problematic in itself that the prevailing beliefs are controversial, so
long as they can be, and are, sincerely held open to revision. 18 The continued openness to
discussion and social experimentation is what keeps social morality and legal institutions within
reason—what makes them reasonable—on Mill’s view. Call this Mill’s legitimacy constraint. A
15
For a partly Mill-inspired approach to morality along these lines, see Kitcher (2011).
16
This is the basic point of his “assumption of infallibility” argument in chapter 2 of On Liberty.
17
See extended quotation later in this section from “Lord Brougham's Defence of the Church
Establishment” (1834), CW VI.228.
18
See Eric MacGilvray (2004) for development of this important thought.
prevailing social morality violates that constraint by removing itself from those processes of public
reasoning that might lead it is own revision. 19 This is why he criticizes the French Assembly in
1848 for placing restrictions on the press.
It denies them free discussion. It says they shall not be suffered to bring their opinions to the
touchstone of the public reason and conscience. It refuses them the chance which every sincere
opinion can justly claim, of triumphing in a fair field. It fights them with weapons which can
as easily be used to put down the most valuable truth as the most pernicious error. (“The French
Law Against the Press” (1848), CW XXV.1118).
A good government, then, puts freedom of discussion first: “In government, perfect freedom of
discussion in all its modes—speaking, writing, and printing—in law and in fact is the first requisite
of good because the first condition of popular intelligence and mental progress. All else is
secondary” (Diary (1854), CW XXVII.661). A prevailing morality might be controversial in many
ways, but it is not illegitimate as long as it is sincerely held open to the processes of criticism and
social experimentation that could lead to its improvement.
19
This might happen in more or less significant ways. But to become separated from those
processes is to make the prevailing social morality a matter simply of the preferences of the
dominant group. This will undermine its tendency toward improvement and, relatedly, its claim to
offer a fair field of play to those who disagree.
In full view, Mill’s defense of the legitimacy constraint is grounded in his account of what is
required for social improvement, and our never being in a position to say here progress ends. 20 As
early as the age of eighteen, he criticizes the Edinburgh Review for seeming to argue “that morality
will never be better understood than at present; that morality will never be better practised than at
present; that mankind will never be more prudent than they now are; that vigour of intellect and
sound views of human affairs are oftener found and better listened to at this moment, than they are
likely to be at any future period” (“Periodical Literature: Edinburgh Review” (1824), CW I.318).
This constant refrain in his work culminates in his “assumption of infallibility” argument in On
Liberty and the claim that the power to silence discussion is “illegitimate”: “The best government
has no more title to it than the worst” (CW XVIII.229). Mill argues that, to the extent that a
government undermines free discussion, it removes itself from the means of criticism and
intellectual improvement that allow for its own future decision-making to improve. Insofar as it
does this, it takes up a position of epistemic superiority toward posterity which it is not entitled to
adopt – as if its decisions could not be improved upon (Turner 2013a). In a characteristic passage,
he concludes:
Until… somebody else can point out any existing state of society which it is desirable to have
stereotyped for perpetual use, we must regard as an evil, all restraint put upon the spirit which
never yet since society existed has been in excess—that which bids us “try all things” as the
only means by which with knowledge and assurance we can “hold fast to that which is good.”
(Newman, CW V.457; but see 454-7)
20
For examples, see Turner (2013a, section 3).
As individuals, then, our participation in the practice of public reason is exhibited
fundamentally by our ongoing support for the social conditions required for free, critical discussion
and associated experiments of living on a fair field of play. Call this Mill’s basic norm of public
reason. The practice of public reason is one in which we may propose any idea we like so long as
it remains open to criticism, and collectively we may adopt any new set of institutions so long as
they are consistent with, and responsive to, the ongoing critical enterprise. The core public reason
commitment just is to maintaining those (liberal) practices and institutions that facilitate that
enterprise. In this way, social and political arrangements are made consistent with the possibility
of progress, and ensure that any future “permanence” in those arrangements “will be the effect of
reason and free choice, not of irrevocable engagements” (Ibid., 456). 21
Undoubtedly, we will need formal mechanisms for settling disputes, and in Considerations on
Representative Government and related writings Mill designs a set of democratic institutions to do
just that. But the crucial thing for our purposes is understanding that those institutional designs
21
Gaus has claimed that Mill’s “master argument” in On Liberty is the broadly social epistemic
argument for open society that helps to justify what I call his legitimacy constraint and his basic
norm of public reason. Gaus argues that, despite differences in values and beliefs, openness to
discussion and social experimentation is a value shared “among all citizens who think that some
ways of living are better, that we have an interest in finding out which they are, and that we can
have justified beliefs about what they are” (Gaus 2008, 100; see also Turner 2017, 576-9). After
Mill, perhaps the most prominent versions of this argument are in Dewey (1927, 1939) and Popper
(1945, 2008).
must be consistent with his underlying commitment to preserving the conditions that allow for
public criticism, reasoned decision-making, and progress.
What the basic norm of public reason entails in practice for particular individuals is expressed
nicely by some of Mill’s writings on education, particularly those concerning the spirit in which a
teacher should present controversial material and the intellectual discipline that should then shape
the classroom discussion. In these passages, he emphasizes that controversial views are not
problematic as long as the material is taught in a way that is meant to engage and develop students’
critical capacities:
It is true mankind differ widely on religion; so widely that is impossible for them to agree in
recommending any set of opinions. But they also differ on moral philosophy, metaphysics,
politics, political economy, and even medicine; all of which are admitted to be as proper
subjects as any others for a national course of instruction. The falsest ideas have been, and still
are, prevalent on these subjects, as well as on religion. But it is the portion of us all, to imbibe
the received opinions first, and start from these to acquire better ones. All that is necessary to
render religion as unexceptionable a subject of national teaching as any of the other subjects
which we have enumerated, is, that it should be taught in the manner in which all rational
persons are agreed that every other subject should be taught—in an inquiring, not a dogmatic
spirit—so as to call forth, not so as to supersede, the freedom of the individual mind. We should
most strongly object to giving instruction on any disputed subject, in schools or universities, if
it were done by inculcating any particular set of opinions.
…Let the teaching be in this spirit, and it scarcely matters what are the opinions of the
teacher: and it is for their capacity to teach thus, and not for the opinions they hold, that teachers
ought to be chosen.” (“Lord Brougham's Defence of the Church Establishment,” CW VI.228)
The principle itself of dogmatic religion, dogmatic morality, dogmatic philosophy, is what
requires to be rooted out; not any particular manifestation of that principle.
…the object is to call forth the greatest possible quantity of intellectual power, and to
inspire the intensest love of truth: and this without a particle of regard to the results to which
the exercise of that power may lead, even though it should conduct the pupil to opinions
diametrically opposite to those of his teachers. We say this, not because we think opinions
unimportant, but because of the immense importance which we attach to them…
…We are not so absurd as to propose that the teacher should not set forth his own opinions
as the true ones, and exert his utmost powers to exhibit their truth in the strongest light… As a
general rule, the most distinguished teacher is selected, whatever be his particular views, and
he consequently teaches in the spirit of free inquiry, not of dogmatic imposition.
(“Civilization,” CW XVIII.144)
In On Liberty and other writings, Mill goes on to articulate a “real morality of public discussion,”
emphasizing candor, openness, and “giving merited honour to every one, whatever opinion he may
hold” (On Liberty, CW XVIII.259), while condemning intolerance, exaggeration, “casuistry and
imposture,” and “hypocrisy” (“Perfectibility” (1828), CW XXVI.433). If we could imagine a
community of public reasoners engaging each other in this spirit—each with their own beliefs and
values, but also fundamentally committed to the practice of free inquiry—we would go a long way
toward appreciating his vision of how social morality might improve over time without
undermining (and perhaps reinforcing) the requisites of social stability addressed above.
4. JUSTIFYING INTERFERENCE
To this point, I have tried to show, first, that Mill solves a version of the problem of private conflict
by appealing to the idea of social morality, and that he introduces a legitimacy constraint and basic
norm of public reason that are justified by the need to revise social morality over time. In this
section I want to examine three practical principles that Mill argues should enjoy public support
and shape revisions to social morality: the presumption in favor of individual liberty, the
presumption in favor of equality, and the liberty principle. 22 Consistent with his own utilitarian
commitments, but not dependent on them, he recommends these principles to the public conscience
as the fruits of common human experience.
If in the last section we glimpsed how Mill handles controversy within public reason, here the
question is the extent to which people can come to agree on certain principles. In an early essay,
Mill is very optimistic that there could be significant convergence on social rules, despite
foundational differences:
22
My discussion in this section is indebted to Gaus (2008).
The grand consideration is, not what any person regards as the ultimate end of human conduct,
but through what intermediate ends he holds that his ultimate end is attainable, and should be
pursued: and in these there is a nearer agreement between some who differ, than between some
who agree, in their conception of the ultimate end. When disputes arise as to any of the
secondary maxims, they can be decided, it is true, only by an appeal to first principles; but the
necessity of this appeal may be avoided far oftener than is commonly believed; it is surprising
how few, in comparison, of the disputed questions of practical morals, require for their
determination any premises but such as are common to all philosophic sects. (“Blakey’s
History of Moral Science” (1833) CW X.29)
We might wonder what overlap of “intermediate ends” Mill has in mind – what are the “secondary
maxims” that allow for a relatively stable social morality? Obvious candidates include general
rules such as those against taking innocent life and arbitrary violence, or in favor of truth-telling
and tending to the sick. Surely such widely accepted rules would be part of any social morality.
But Mill also spent much of his career addressing issues on which there was vigorous
disagreement, including (just to name some of his preoccupations) women’s rights, slavery,
domestic violence, free trade, and population control, some of which promised to cause significant
social strife.
In the rest of this section, I argue that Mill introduces three main public principles to help us
navigate disagreement. This is not to ignore Mill’s own utilitarian arguments for various practical
conclusions, but to highlight the principles he thought could help us find common ground. Two of
them are stated in the following passage:
The à priori presumption is in favour of freedom and impartiality. It is held that there should
be no restraint not required by the general good, and that the law should be no respecter of
persons, but should treat all alike, save where dissimilarity of treatment is required by positive
reasons, either of justice or of policy. (The Subjection of Women [Subjection] (1869), CW
XXI.262)
The first principle expressed here, the “presumption in favor of liberty,” 23 is a general “noninterference” principle according to which “the onus of making out a case always lies on the
defenders of legal prohibitions” (Principles of Political Economy [Principles] (1848), CW III.936,
938). In the context of free discussion and social experimentation, the presumption in favor of
liberty can help us choose among candidate social rules and legal arrangements. It is justified, he
argues, by at least two widely accepted considerations. First, the freedom to live one’s life as one
sees fit—at least in many respects—is a good felt by most or all individuals: “He who would
rightly appreciate the worth of personal independence as an element of happiness, should consider
the value he himself puts upon it as an ingredient of his own” (Subjection, CWXXI.336-7).
Whether a utilitarian or not, our commonly felt irritation at being interfered with reveals that we
all care about preserving a range of personal freedom. Second, Mill believes history has shown
that leaving activities to the voluntary action of individuals usually leads to better outcomes than
placing them under the control of government or social authority: “…freedom of individual choice
is now known to be the only thing which procures the adoption of the best processes, and throws
each operation into the hands of those who are best qualified for it” (Ibid., 273). Mill’s own social
23
See Gaus (2008, 91-2).
and political conclusions show that the presumption in favor of liberty can be overcome in a great
many cases, but he considers it an important guidepost in considering revisions to social morality.
An important extension of the presumption in favor of liberty is Mill’s claim that coercive
(what he calls “authoritative”) interference requires more justification than non-coercive
interference. The upshot of this extension is that social authority should be aware of when a noncoercive measure—one that merely provides us options or encourages us to do something—would
obviate the need for an authoritative measure that constrains our options: “When a government
provides means for fulfilling a certain end, leaving individuals free to avail themselves of different
means if in their opinion preferable, there is no infringement of liberty, no irksome or degrading
restraint. One of the principal objections to government interference is then absent” (Principles,
CW III.938-9). The hope is that non-coercive measures could be widely accepted as a path toward
social reform, even if the content of those reforms is otherwise controversial. Recently, this has
been revived and developed as a public principle in the libertarian paternalism of Sunstein and
Thaler (2008), which seeks to “nudge” us, instead of coerce us, to make better choices for
ourselves.
The second public principle expressed in the above passage is the presumption in favor of
equality. What Mill calls “impartiality” there is the principle that social morality and the law should
not make distinctions among persons except where there is good reason for it. This is a central
theme, for instance, in his rejection of women’s inequality:
…the course of history, and the tendencies of progressive human society, afford not only no
presumption in favour of this system of inequality of rights, but a strong one against it; and
that, so far as the whole course of human improvement up to the time, the whole stream of
modern tendencies, warrants any inference on the subject, it is, that this relic of the past is
discordant with the future, and must necessarily disappear. (Subjection, CW XXI.272)
The new default for all groups, Mill argues, should be a presumption of equality – it is inequalities
that require justification. He is aware of the motivated reasoning keeping certain prejudices in
place, but he argues that as social morality has developed, and whatever concrete rules we might
endorse concerning particular matters, it has increasingly been understood to embody respect
among equals:
[C]ommand and obedience are but unfortunate necessities of human life: society in equality is
its normal state. Already in modern life, and more and more as it progressively improves,
command and obedience become exceptional facts in life, equal association its general rule.
The morality of the first ages rested on the obligation to submit to power; that of the ages next
following, on the right of the weak to the forbearance and protection of the strong. How much
longer is one form of society and life to content itself with the morality made for another? We
have had the morality of submission, and the morality of chivalry and generosity; the time is
now come for the morality of justice. Whenever, in former ages, any approach has been made
to society in equality, Justice has asserted its claims as the foundation of virtue. (Subjection,
CW XXI.293-4)
In his clearest expression of an ideal of social morality—though, again, consistent with varying
social rules—Mill argues that complete equality offers something of an end-point:
[T]he true virtue of human beings is fitness to live together as equals; claiming nothing for
themselves but what they as freely concede to every one else; regarding command of any kind
as an exceptional necessity, and in all cases a temporary one; and preferring, whenever
possible, the society of those with whom leading and following can be alternate and reciprocal.
(Subjection, CW XXI.294)
At the very least, Mill rejects authoritarian arrangements and inequalities based on race, ethnicity,
religion, and gender, and he calls instead for respect for each other as free and equal citizens, in a
way that is that is characteristic of the public reason tradition. He suggests a picture of holding
each other accountable that respects the logic of reciprocity. Educating a community capable of
sustaining a social morality in this way would be a great achievement.
Mill’s third public principle, the most famous of them, is the liberty principle (aka the harm
principle). It introduces a strict anti-paternalism constraint on “authoritative” interference with
competent individuals, according to which “the only purpose for which power can be rightfully
exercised over any member of a civilized community, against his will, is to prevent harm to others”
(On Liberty, CW XVIII.223). While the presumption in favor of liberty is quite broad and
defeasible, the liberty principle is much narrower and absolute. Properly understood, it does not
make a claim about when social interference is justified, but about the scope of society’s rightful
authority: coercive interference may not even be considered by some social or governmental
authority except to protect others from harm. To the extent that the actions of competent adults
concern only themselves, they are “sovereign” and should be left free from authoritative
interference.
The justification of this principle is disputed territory, but I think it is important to see that Mill
offers it up, at least in part, as a principle of public reason to help direct our revision of social
morality in other respects. Gaus has argued that Mill’s strategy to justify this and other liberal
principles is to appeal to a “wide array of citizens’ beliefs and values” (2008, 84; see also Rawls
2007, 284–91). My view is that the liberty principle is justified primarily by a shared interest in
competent decision-making, and by evidence that individuals are the best judges of their own good
(Turner 2013b). However it is justified, the liberty principle has been an incredibly influential
public principle, shaping our notions of the appropriate limits of government and social
interference with personal choices – including, most notably, sexual morality.
Each of these three principles plays a significant part in Mill’s thinking, yet accepting them
does not require taking up the utilitarian perspective. Rather, they demonstrate the extent to which
he believes that we can collectively learn from experience and adopt principles to help us fashion
an ever-improving social morality that maintains its integrity over time, despite ongoing
disagreement on concrete matters.
CONCLUSION: THE CONNECTION TO UTILITY
I have tried to show that Mill recognizes both the problem of private conflict and the need for
social morality to solve it, that he articulates a practice of public reason to revise social morality
over time, and that he introduces certain public principles that he believes can enjoy broad public
support to shape that process. Despite this, Mill’s basic commitments undoubtedly remain
utilitarian. Social morality may define our moral obligations, but he also writes of “moral
obligation, which in itself, and independently of the purposes for which it exists, cannot be
accounted a good” (Newman, CW V.455). In this last section, then, I want to sketch how Mill’s
commitment to social morality fits within his utilitarianism and, in particular, what sort of
independence it has as a guide for individual moral agents.
Although Mill rejects rule utilitarianism (or so I have argued in Turner 2015a), his account of
social morality shares with it the thought that a practice could be justified on utilitarian grounds
and that subsequent decisions within that practice should then generally proceed without direct
reference to the principle of utility (see Rawls 1955). Unlike the rule utilitarian, Mill expects us to
appeal directly to utility in exceptional cases. 24 But he argues that our commitment to social
morality—to abiding by a shared set of normative expectations—is itself justified by the principle
of utility and that the integrity of social morality over time requires us to form of a habit of
deference, a sense of allegiance, and fellow-feeling. Moreover, because he believes that the state
of nature is the worst state, keeping our commitment to social morality outweighs most any other
utilitarian consideration. This is, I think, the significance of the following passage:
Scarcely any degree of utility, short of absolute necessity, will justify a prohibitory regulation,
unless it can also be made to recommend itself to the general conscience; unless persons of
ordinary good intentions either believe already, or can be induced to believe, that the thing
prohibited is a thing which they ought not to wish to do. (Principles, CW III.938)
24
E.g. “Thornton on Labour and its Claims” (1869), CW V.659. For other relevant passages, see
Turner (2015a).
New coercive measures that risk social unrest, and so the dissolution of social morality, can be
justified only in extreme circumstances. The effect of this is to give great weight to maintaining
our shared normative expectations. It means generally following the rules widely recognized in
society, and being aware of when an exception to those rules would also be expected. In some
cases, violating a social expectation might be justified—but it is important that doing so would not
threaten the general practice of conforming to social morality.
Certainly, at least in the great majority of circumstances, it entails a rejection of revolutionary
attempts at reform. Thus, despite endorsing socialist ideas, Mill strongly objects to the
“revolutionary Socialists” of the 19th century:
[T]hose who would play this game on the strength of their own private opinion, unconfirmed
as yet by any experimental verification—who would forcibly deprive all who have now a
comfortable physical existence of their only present means of preserving it, and would brave
the frightful bloodshed and misery that would ensue if the attempt was resisted—must have a
serene confidence in their own wisdom on the one hand and a recklessness of other people’s
sufferings on the other. (Chapters on Socialism, CW V.737)
One way to consider the place of social morality in Mill’s overall ethical theory is to think of
his utilitarianism being applied stepwise. In the first step, it justifies the move from the state of
nature to a state of society. And because it is hard to imagine that a return to the state of nature
could be justified, Mill’s basic commitment to utility is expressed practically by our support for
the social morality that keeps us out of the state of nature. We might accept some risk of return,
but Mill argues that the consequences of that would be so dire that we normally do better keeping
to social morality and to piecemeal reform efforts through the practice of public reason.
In the second step, then, Mill’s commitment to utility is extended as a practical matter to the
basic norm of public reason required for the rational revision of social morality. This is part of the
force of his claim in On Liberty that “I regard utility as the ultimate appeal on all ethical questions:
but it must be utility in the largest sense, grounded on the permanent interests of man as a
progressive being” (CW VIII.224). Mill does not have in mind a fully-formed, ideal social morality
that would allow us to reverse engineer social reforms. We can concentrate our attention on “the
immediate impediment to progress” (CRG, CW XIX.396; emphasis added), but beyond that the
key thing is to defend the free discussion and social experimentation that alone give us hope of
learning from experience and the assurance that future changes to social morality will constitute
improvements.
It bears repeating that, at any given point in time, social morality is unlikely to be optimal from
the perspective of any particular person. But it provides what Gaus calls a “moral constitution” –
a public standard that each of us has sufficient reason to endorse even though, like our legal
constitution, it is “not to be equated with any specific moral perspective, with its particular
understanding of values, rightness, and the morally relevant nature of the social world” (Gaus
2016, 179). On the view I have been defending, Mill accepts this basic picture and then emphasizes
that the moral constitution, like a legal constitution, must allow for its own revision through free
discussion and social experimentation. This latter thought animates his vision of the practice of
public reason. 25
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