A Philosophical Inquiry into the Fragmentation and Loss of Moral Rationality
Preface and Introduction: Setting the Question
We open with MacIntyre’s own framing of the task: this work examines not merely what moral philosophers said in the twentieth century, but what happened *to* moral philosophy itself as a discipline. The book is an attempt to understand why moral philosophy entered a state of deep disagreement about its own purposes and methods, and why that disagreement reflects a larger crisis in moral reasoning.
MacIntyre begins by stating that the twentieth century opened with moral philosophy in a condition of relative confidence, but closed in a state of radical fragmentation. The dominant traditions at the start—utilitarianism, Kantianism, and intuitionism—each appeared to offer systematic accounts of moral judgment. By the century’s end, however, these traditions had been subjected to such thorough criticism that their foundations were widely regarded as unstable, and no new consensus had emerged to replace them. As MacIntyre puts it:
“The history of moral philosophy in the twentieth century is a history of successive failures, but failures that are nonetheless instructive.”
He clarifies that this is not a history of error to be dismissed, but a history that reveals something essential about the nature of moral thought. The failures are not accidental—they are the outcome of deep structural problems in how modern moral philosophy conceives of itself. The introduction thus sets up the central claim: that the twentieth-century crisis in moral philosophy is a symptom of the loss of a shared moral vocabulary and rational framework that earlier ages possessed.
What this means is that MacIntyre is not simply cataloguing philosophical positions. He is arguing that the very terms in which twentieth-century moral philosophers conducted their debates—terms like “right,” “good,” “obligation,” “value”—had become detached from any coherent context that could give them determinate meaning. The book will trace how this detachment occurred and what its consequences are.
Chapter 1: The Legacy of the Nineteenth Century — Nietzsche and Marx
MacIntyre begins his substantive narrative in the nineteenth century, because the problems that structure twentieth-century moral philosophy originate there. He locates the reader at the point where the great systematic moral philosophies of the Enlightenment—Kantianism and utilitarianism—had already begun to break down under internal and external pressures. The key figures who diagnosed this breakdown were Friedrich Nietzsche and Karl Marx, and their critiques set the agenda for everything that follows.
MacIntyre presents Nietzsche’s critique as the more directly philosophical. Nietzsche argued that the moral systems of Kant and the utilitarians were not rational discoveries but expressions of will—specifically, of a “slave morality” that had inverted the values of earlier aristocratic cultures. For Nietzsche, moral judgments were not objective truths but instruments of power, and the pretense that they were rational was itself a form of deception. MacIntyre quotes Nietzsche’s famous claim that “there are no moral phenomena at all, but only a moral interpretation of phenomena.” This means that what we take to be moral facts are actually interpretations imposed by particular psychological and historical forces.
Marx’s critique operated on a different level. Marx argued that moral philosophies are products of class interest and material conditions. The Kantian emphasis on duty and the utilitarian calculus of happiness both reflected the needs of bourgeois society. Moral systems, in Marx’s view, functioned as ideology—they disguised the exploitation inherent in capitalist social relations. A truly just society would not need moral philosophy in the old sense, because the conditions that generate moral conflict would be overcome.
MacIntyre then clarifies the significance of these critiques: together, Nietzsche and Marx posed a challenge that twentieth-century moral philosophy never fully answered. If morality is merely an expression of will (Nietzsche) or a mask for class domination (Marx), then the entire project of rational moral justification collapses. The rest of the century can be read as a series of attempts to rebuild moral philosophy in the face of this double challenge—attempts that, MacIntyre argues, all ultimately failed because they never fully confronted the depth of the problem.
Chapter 2: The Rise of Analytic Moral Philosophy — Moore and the Naturalistic Fallacy
With the nineteenth-century critique established, MacIntyre turns to the early twentieth century and the emergence of analytic moral philosophy in the English-speaking world. The pivotal figure is G. E. Moore, whose 1903 work *Principia Ethica* inaugurated a new way of doing ethics. MacIntyre walks the reader through Moore’s central argument: that the concept of “good” is a simple, indefinable, non-natural property, and that any attempt to define it in natural terms—such as “pleasure” or “desire”—commits the “naturalistic fallacy.”
Moore’s method is crucial. He argues that if someone says “good” means “what we desire,” we can always ask: “But is it good to desire that?” This question shows that “good” is not identical with any natural property, because the question remains intelligible after the identification is made. Therefore, “good” names a unique property that we grasp by intuition—a direct, non-inferential awareness. Moore’s famous example is that of a beautiful world: even if no one were ever to experience it, its value would still be real, because beauty is good in itself.
MacIntyre then presents Moore’s impact. *Principia Ethica* was taken by many as a liberation from the confusions of utilitarianism and Kantianism, which had both attempted to reduce goodness to something else. Moore’s intuitionism—the view that moral truths are known by direct intuition—became the dominant approach in British philosophy for several decades. Philosophers like H. A. Prichard and W. D. Ross developed Moore’s insights into elaborate systems of prima facie duties, each known intuitively.
But MacIntyre also points to the problem that Moore’s position creates. If moral truths are known by intuition, and different people have conflicting intuitions, how is disagreement to be resolved? Moore himself had no answer—he simply insisted that those who disagreed with him were “confused” or “not seeing clearly.” This sets the stage for the collapse of intuitionism later in the century. MacIntyre notes that Moore’s claim that “good” is a non-natural property does nothing to explain how such properties fit into a scientific worldview. The next chapters will show how this tension exploded.
Chapter 3: The Emotivist Challenge — Ayer and Stevenson
MacIntyre now moves to a direct confrontation with Moore’s legacy. In the 1930s, a new generation of philosophers, influenced by logical positivism, argued that Moore’s “non-natural properties” were metaphysical nonsense. The key text is A. J. Ayer’s *Language, Truth and Logic* (1936), which advanced the emotivist theory of moral language.
Ayer argued that all meaningful statements are either analytic (true by definition, like mathematics) or empirically verifiable (testable by sense experience). Moral judgments fall into neither category. When someone says “Stealing is wrong,” they are not stating a fact that can be verified or falsified. They are, Ayer claims, simply expressing an emotion—something like “Stealing—boo!”—or issuing a command—”Don’t steal!” Consequently, moral judgments are not true or false. They are not *about* anything objective at all.
MacIntyre presents Ayer’s argument in detail. Ayer acknowledges that moral language appears to be factual—we say “is wrong” as if we were attributing a property. But this is a grammatical illusion. Under logical analysis, the apparent property disappears. This is emotivism: the doctrine that moral utterances are expressions of attitude, not statements of fact.
MacIntyre then brings in C. L. Stevenson, who refined emotivism in his 1944 book *Ethics and Language*. Stevenson argued that moral language has both descriptive and emotive meaning. When I say “This is good,” I am both describing my approval and expressing that approval to influence others. The persuasive function is primary. Stevenson’s famous example is the difference between “This is red” (purely descriptive) and “This is good” (emotively charged). The former can be settled by looking; the latter cannot, because it expresses a *conflict of attitudes*.
What MacIntyre shows here is that emotivism is not merely a theory about language—it is a radical challenge to the possibility of moral reasoning. If moral judgments are no more than expressions of feeling, then rational argument about morality becomes impossible. Disagreements can only be resolved by persuasion, manipulation, or force. MacIntyre notes that this conclusion was deeply unsettling to many philosophers, who saw it as a betrayal of the very purpose of moral philosophy. The rest of the century can be understood as a struggle to escape from the emotivist conclusion without returning to Moore’s untenable intuitionism.
Chapter 4: The Politics of Moral Language — C. L. Stevenson and the Will to Persuade
We are now in the heart of the emotivist project, where MacIntyre examines how Stevenson transformed the simple theory of Ayer into a full-blown account of moral language as an instrument of social influence. This section is where emotivism becomes not just a semantic theory but a political and psychological one.
Stevenson’s key innovation is to distinguish between disagreement in belief and disagreement in attitude. Disagreement in belief is about what is true or false—two people might disagree about whether a table is three feet wide. Disagreement in attitude, by contrast, is about whether something is desired or approved of—two people might disagree about whether a particular painting is beautiful, not because they differ on the facts, but because they have different emotional responses to it. Moral disagreements, Stevenson argues, are primarily disagreements in attitude, though they may also involve disagreements in belief. When two people argue about whether abortion is wrong, they are not ultimately arguing about the facts of fetal development or the law; they are expressing opposing attitudes toward abortion and trying to change each other’s attitudes.
Stevenson then develops a detailed account of how moral language works. A moral judgment like “This is good” is not a statement of fact but an expression of approval combined with a suggestive or emotive meaning that tends to evoke a similar attitude in the hearer. As Stevenson puts it in one of his central formulations, the meaning of a moral term is not its descriptive content but its “quasi-imperative” force. To say “This is good” is roughly equivalent to saying “I approve of this; do so as well.” The moral judgment is thus a tool of persuasion, aimed at coordinating attitudes and actions.
What MacIntyre draws out here is the subtlety of Stevenson’s position. Unlike Ayer, Stevenson does not think moral arguments are meaningless or pointless. Rather, he thinks they are rational in a limited sense: they can change attitudes by changing beliefs about the facts. If I disapprove of capital punishment because I believe it does not deter crime, you might change my attitude by showing me evidence that it does. But at the fundamental level—where attitudes themselves are at stake—there is no rational method of resolution. As MacIntyre notes, Stevenson’s account makes moral argument into a kind of psychological manipulation, where the persuasive force of language is used to bring others into alignment with one’s own attitudes. The distinction between rational persuasion and irrational coercion begins to blur.
Chapter 5: The Rehabilitation of Practical Reason — Anscombe, Foot, and the Return to Virtue
We now encounter a major turning point in MacIntyre’s narrative. In the 1950s, a group of philosophers, most notably G. E. M. Anscombe and Philippa Foot, began to challenge the entire framework of emotivism and its assumptions about moral language. This section is where MacIntyre shows the first serious attempt to recover what had been lost in the twentieth century.
Anscombe’s 1958 paper “Modern Moral Philosophy” is the decisive text. She argues that the very concepts of “moral obligation,” “moral duty,” and “moral rightness” are survivals from an earlier world-view—specifically, from a theistic framework in which morality was understood as divine law. Once you abandon belief in a divine lawgiver, these concepts become meaningless. As MacIntyre presents her argument, Anscombe claims that modern moral philosophers are trying to use terms that have no coherent application outside their original theological context. The idea of a “moral law” without a lawgiver is, she suggests, as incoherent as the idea of a legal system without a legislator. This is why, for Anscombe, the whole enterprise of deontological ethics—from Kant to Moore—is fundamentally misguided.
“It is not profitable for us at present to do moral philosophy; that should be laid aside at any rate until we have an adequate philosophy of psychology, in which we are conspicuously lacking.”
Anscombe’s proposed alternative is to return to an Aristotelian framework of virtue ethics. Instead of talking about moral rules or obligations, we should talk about what it means to be a good human being—what the virtues are, how they are acquired, and how they relate to human flourishing. MacIntyre notes that Anscombe’s argument is not merely a negative critique; it opens the door to a positive project. She insists that we need a philosophy of psychology that can give an account of human action, intention, and character—something that emotivism, with its focus on isolated expressions of feeling, entirely lacks.
Philippa Foot then extends this project in a different direction. In her essays from the 1950s and 1960s, collected in *Virtues and Vices*, she argues that moral judgments are not simply expressions of attitude but are rational evaluations of human action in light of human needs and purposes. Foot famously challenges the emotivist claim that you can change someone’s morality by changing their feelings. She argues that moral evaluations are like evaluations of other natural qualities—you cannot call something a “good knife” simply because you like it; it must actually perform the function of a knife. Similarly, you cannot call something a “good human action” simply because you approve of it; it must actually contribute to human flourishing.
What MacIntyre emphasizes is that Foot is attempting to reconnect moral language to objective human goods—to facts about what humans need and desire. She argues that there are certain things that any human being must want: life, health, knowledge, friendship. These are not just subjective preferences; they are necessary conditions for any meaningful human life. Moral judgments, then, are about what actions and character traits are conducive to achieving these goods. This is a direct challenge to the emotivist claim that moral judgments have no truth-value. For Foot, a moral judgment can be true or false in exactly the same way that a judgment about a knife’s quality can be true or false—by reference to objective standards of human functioning.
Chapter 6: The Failure of the Linguistic Turn — Hare, Rawls, and the Return to Rules
We are now in the 1960s, and MacIntyre traces a parallel development: the attempt by R. M. Hare and others to construct a non-emotivist account of moral language that still maintains its autonomy from facts. This section shows how the linguistic turn in moral philosophy reached its limits and began to collapse under its own weight.
Hare’s *The Language of Morals* (1952) and *Freedom and Reason* (1963) represent the most sophisticated attempt to build a moral theory on the foundation of prescriptivism. Hare argues that moral judgments are prescriptive—they tell us what to do, not what is the case. But unlike emotivism, Hare insists that moral judgments are universalizable: if I say that an action is wrong, I must be willing to apply the same prescription to all relevantly similar cases. This gives moral language a kind of rationality: it requires consistency and impartiality. However, MacIntyre points out that Hare’s universalizability is purely formal. It does not tell you what to prescribe, only that your prescriptions must be consistent. In practice, this means that two people could disagree about fundamental moral principles—one prescribing equal distribution of resources, another prescribing the survival of the fittest—and both could be using moral language correctly.
“The fundamental principles of morality are not open to rational justification. They are simply what we choose to prescribe universally.”
This is MacIntyre’s crucial observation: Hare’s prescriptivism, despite its formal rationality, ends up in the same place as emotivism. The ultimate choice of moral principles is a matter of decision or commitment, not of reason. Hare calls this the “decision of principle,” and it is precisely the point where rational argument stops. MacIntyre argues that this is a sign of the failure of the whole project: if moral philosophy can only tell us how to speak consistently about our choices, without being able to evaluate the choices themselves, then it has abandoned its traditional task of guiding human action toward the good.
MacIntyre then turns to John Rawls, whose *A Theory of Justice* (1971) is the most ambitious attempt in the analytic tradition to construct a substantive moral theory. Rawls avoids the linguistic turn entirely and returns to the tradition of social contract theory. He asks us to imagine choosing principles of justice behind a “veil of ignorance”—a hypothetical situation in which no one knows their own social position, talents, or conception of the good. Under these conditions, he argues, rational people would choose two principles: equal basic liberties for all, and the fair distribution of social and economic goods (the difference principle).
MacIntyre’s treatment of Rawls is characteristically skeptical. He notes that Rawls’s argument relies on a very specific conception of rational self-interest—the idea that people would choose principles that maximize their own expected outcome under uncertainty. But this conception of rationality is itself a moral assumption, not a neutral fact. Moreover, MacIntyre argues that the “veil of ignorance” strips away precisely what is most important in moral deliberation: our particular identities, commitments, and histories. The Rawlsian contractor is a disembodied rational agent, exactly the kind of being that emotivism had shown to be impossible. MacIntyre’s point is that Rawls represents a last-ditch effort to save the Kantian project of a universal, rational morality, but he does so by ignoring the very problem that emotivism had exposed: that there is no neutral, objective standpoint from which to evaluate competing moral claims.
Chapter 9: The Unresolved Tension — MacIntyre’s Own Critique of the Twentieth Century
We are now in the final movement of the book, where MacIntyre turns from surveying the works of others to articulating his own diagnosis of what has gone wrong in twentieth-century moral philosophy and what remains to be done.
MacIntyre begins this chapter by returning to the question that has haunted the entire book: why has moral philosophy in the twentieth century been so spectacularly unsuccessful? His answer is that the discipline has been trapped in a series of unresolved tensions that it has refused to acknowledge. The central tension is between the emotivist theory of moral language and the actual experience of moral agents who continue to make claims that they take to be objectively true. MacIntyre writes:
“The consequence is that twentieth-century moral philosophy has been a series of attempts to escape from the implications of its own findings, attempts that have invariably failed because they could not bring themselves to confront the real nature of the problem.”
The problem, as MacIntyre sees it, is that the major figures of the century—from Moore to Ayer to Hare to Rawls—have all accepted, at different levels, the emotivist premise that moral judgments are not straightforwardly truth-apt in the way that empirical or logical claims are. But they have also all been unwilling to accept the radical consequences of this premise: that morality would then be merely a matter of subjective preference. Each philosopher has tried to find a way of restoring objectivity to moral discourse without confronting the fact that the philosophical foundations for such objectivity had been systematically destroyed. MacIntyre traces this pattern across the century: Moore tried to ground morality in non-natural properties that no one could actually perceive; Ayer and Stevenson embraced emotivism but then tried to salvage moral reasoning through non-cognitive means; Hare tried to create a logic of universal prescriptivism that would constrain moral judgments without grounding them in truth; Rawls tried to derive principles of justice from a purely procedural conception of rationality that had no substantive moral content. Each attempt failed, MacIntyre argues, because it refused to acknowledge that the problem was not one of technique but of moral epistemology—we no longer had any way of knowing whether our moral claims were true or false.
What this means for the reader is that the entire trajectory of twentieth-century moral philosophy has been a kind of systematic evasion. The discipline has been unwilling to face the possibility that its own premises lead to moral nihilism, and so it has created ever more elaborate intellectual structures to hide this fact from itself. MacIntyre’s presentation is not merely a critique of individual philosophers but a diagnosis of a collective failure of intellectual honesty. The result is a moral philosophy that is both technically sophisticated and existentially bankrupt—capable of endless refinement of arguments but incapable of giving anyone a reason to be moral.
Chapter 10: The Question of Truth — And the Wager of Tradition
The penultimate chapter of the book shifts from diagnosis to the beginning of a constructive proposal. MacIntyre introduces what he calls the tradition-constituted conception of moral enquiry, which he presents as the only viable alternative to the failed projects of the twentieth century.
MacIntyre begins by arguing that the central question for any moral philosophy is whether there is such a thing as moral truth. The twentieth century, he argues, has been unable to answer this question because it has been working with an inadequate conception of what truth is and how it can be known. The dominant view has been that truth is a property of propositions that correspond to an independently existing reality—what MacIntyre calls the correspondence theory of truth. On this view, a moral judgment can be true only if there are moral facts that exist independently of our beliefs and practices. But as the emotivists and their successors have shown, there is no good reason to believe in such facts. The consequence is that the correspondence theory of truth, when applied to morality, leads inevitably to some form of non-cognitivism.
However, MacIntyre argues that this is not the only possible conception of truth. He draws on the work of Thomas Aquinas and later Thomistic philosophers to develop an alternative: truth as the conformity of intellect to reality, but understood not as a relation between a proposition and a mind-independent state of affairs, but as a relation between a mind and reality that is always mediated by a tradition of enquiry. On this view, we cannot step outside of our historical and cultural situation to compare our beliefs directly with reality. Instead, we can only test our beliefs against the standards of rationality that are internal to the tradition in which we stand. The key is that a tradition is not a closed system but a living, developing body of enquiry that can identify and correct its own errors. MacIntyre writes:
“A tradition is an argument extended through time in which certain fundamental agreements are defined and redefined in terms of two kinds of conflict: those with critics and enemies external to the tradition who reject all or at least key parts of those fundamental agreements, and those internal, interpretative debates through which the meaning and rationale of the fundamental agreements come to be expressed and by whose progress a tradition is constituted.”
What this means is that moral enquiry cannot be conducted from a neutral, universal standpoint—the dream of Kant and his twentieth-century followers—but only from within a particular tradition of moral reasoning. MacIntyre identifies three major traditions: the Aristotelian-Thomistic tradition, the Nietzschean tradition, and the liberal individualist tradition (which includes most of the analytic philosophers discussed in the book). Each tradition has its own standards of rational justification, its own conception of the good, and its own criteria for what counts as a successful argument. There is no neutral, tradition-independent standpoint from which to adjudicate between them.
The clarification needed here is that MacIntyre is not advocating a simple relativism. He does not think that all traditions are equally valid. Rather, he argues that traditions can be evaluated in terms of their ability to solve their own problems, to respond to challenges from rival traditions, and to provide their adherents with a coherent account of moral experience. The Aristotelian-Thomistic tradition, MacIntyre believes, has proven itself superior in these respects—but this is a claim that can only be made from within that tradition, not from a neutral standpoint. The point is that moral philosophy in the twentieth century has failed because it has tried to escape from the need to be part of a tradition, seeking a universal rationality that does not exist.
Chapter 11: The Future of Moral Philosophy — A Conclusion Without Resolution
In the final chapter of the book, MacIntyre confronts the implications of his argument for the future of moral philosophy. The chapter is not a triumphant conclusion but a somber reflection on what has been lost and what might yet be recovered.
MacIntyre begins by summarizing the situation that the book has described. Twentieth-century moral philosophy has been a story of repeated failure: the failure of intuitionism, the failure of emotivism, the failure of prescriptivism, the failure of contractarianism. Each philosophical project has collapsed under the weight of its own internal contradictions, and no new project has emerged to take their place. The result is that moral philosophy in the late twentieth century is in a state of disarray, unable to provide either a convincing account of moral reasoning or a practical guide to moral life. MacIntyre writes:
“We have been left with a moral vocabulary that we continue to use—words like ‘right,’ ‘wrong,’ ‘good,’ ‘bad,’ ‘just,’ ‘unjust’—but we no longer have any coherent understanding of what these words mean or how they are to be justified. We are like people who continue to use the tools of a craft long after the craft itself has been abandoned, without knowing why the tools were shaped as they were or what purposes they were meant to serve.”
This is MacIntyre’s most powerful image: the disappearance of the craft of moral reasoning. The twentieth century has not refuted morality—it has simply forgotten how to do it properly. The technical apparatus of analytic philosophy has given us sophisticated methods for analyzing moral language, but it has not given us any way of using that language to actually reason about what we ought to do. We have the vocabulary but not the practice.
What then is to be done? MacIntyre’s answer is both modest and radical. He argues that the first task for moral philosophy is to acknowledge its own failure. This means giving up the ambition of finding a universal, tradition-independent foundation for morality. It means accepting that any viable moral philosophy will have to be part of a tradition of enquiry, with its own history, its own texts, its own exemplary figures, and its own standards of rational justification. The second task is to recover the traditions that have been lost or suppressed by the dominant liberal individualist culture. For MacIntyre, this means above all the recovery of the Aristotelian-Thomistic tradition, which he believes offers the most coherent and adequate account of moral life.
But MacIntyre is not optimistic about the prospects for this recovery. He notes that the social and political conditions that sustained the Aristotelian-Thomistic tradition—the existence of communities with shared conceptions of the good, the practice of the virtues, the authority of moral exemplars—have largely disappeared in modern liberal societies. The task of rebuilding these conditions is not primarily a philosophical task but a political and social one. Philosophy can diagnose the problem and point to possible solutions, but it cannot by itself recreate the conditions for genuine moral enquiry. The book ends not with a program for reform but with a call to intellectual honesty: to face the fact that we have lost our moral way and to begin the long, difficult work of finding it again.
Chapter 7: Liberalism and the Problem of Neutrality — Rawls, Nozick, and the Limits of Justice
We are now in the middle of the work’s examination of the dominant moral and political theories of the late twentieth century, turning to the debate between liberal egalitarianism and libertarianism as exemplified by John Rawls and Robert Nozick.
PRESENT: MacIntyre presents Rawls’s *A Theory of Justice* as the most systematic attempt to construct a moral and political theory that does not depend on any particular conception of the good life. Rawls’s central idea is that principles of justice should be chosen under a veil of ignorance, where no one knows their social position, talents, or conception of the good. From this original position, Rawls argues, rational individuals would choose two principles: (1) equal basic liberties for all, and (2) social and economic inequalities are acceptable only if they are attached to positions open to all under conditions of fair equality of opportunity and if they are to the greatest benefit of the least advantaged (the difference principle). MacIntyre notes that Rawls claims these principles are neutral between competing conceptions of the good—they do not favor any particular view of what makes life worth living.
MacIntyre then presents Nozick’s response in *Anarchy, State, and Utopia* as a radical critique from the right. Nozick argues that Rawls’s difference principle violates the fundamental rights of individuals to their holdings—what they have legitimately acquired through original acquisition or voluntary transfer. For Nozick, any pattern of distribution that requires continuous redistribution to maintain it is unjust, because it treats individuals as mere means to the satisfaction of others. Nozick defends a minimal state limited to protecting individual rights against force, fraud, and theft, and argues that any more extensive state violates the side constraints that protect individuals from being used as resources for the benefit of others.
CLARIFY: MacIntyre’s purpose in presenting this debate is not to choose sides but to show that both Rawls and Nozick fail in their attempt to provide a neutral, universally valid account of justice. Both theories, he argues, presuppose specific conceptions of the self and of social life—Rawls assumes a self that is essentially separate from its ends and capable of choosing them from an impartial perspective, while Nozick assumes a self defined by its property rights and individual autonomy. Neither theory can provide a rational basis for resolving disagreements between these competing visions because each starts from premises that the other rejects. The liberal project of constructing a moral theory that can be accepted by all rational persons, regardless of their substantive commitments, is revealed as an illusion.
“The liberal attempt to provide a justification for morality and politics that is independent of any particular conception of the good fails, because the principles of justice that liberal theorists defend already presuppose a particular conception of the good—one that gives priority to individual rights and autonomy over other goods.”
Chapter 8: The Fragmentation of Morality — The Proliferation of Disagreement
This chapter shifts from the detailed analysis of particular theories to a broader diagnosis of the moral condition of the late twentieth century, focusing on the phenomenon of systematic and apparently irresolvable disagreement.
PRESENT: MacIntyre identifies three features of contemporary moral disagreement that distinguish it from earlier periods. First, disagreements are interminable—they do not tend toward resolution through rational argument but instead become more entrenched over time. Second, the arguments used by each side are incommensurable—they appeal to fundamentally different premises and standards of evidence, so that what counts as a good reason for one side is often irrelevant to the other. Third, the concepts used in moral argument have become fragmented—they are survivals from earlier contexts in which they had a coherent role, but they now function without the framework that gave them meaning.
MacIntyre illustrates this with a case study: the debate over abortion. Each side in this debate appeals to genuine moral considerations—the right to life, the autonomy of the woman, the value of potential persons—but these considerations cannot be weighed against each other in any rational way because they belong to different moral frameworks. The pro-life advocate appeals to a natural law concept of human life as sacred from conception, while the pro-choice advocate appeals to a liberal concept of individual autonomy and bodily integrity. There is no neutral standard by which these competing frameworks can be judged, because the frameworks themselves define what counts as a valid moral reason. The result is not reasoned debate but the exchange of assertions and counter-assertions, each side equally convinced of its own rationality and the irrationality of the other.
CLARIFY: MacIntyre’s diagnosis is not that moral disagreement is new—it is not—but that the character of modern disagreement is distinctive. In earlier periods, disagreements took place within a shared moral framework, so that opposing parties could appeal to common premises and standards of argument. In the modern world, by contrast, disagreements take place between frameworks, so that no common ground exists for rational resolution. This situation is the direct consequence of the emotivist culture that MacIntyre described earlier: when moral judgments are understood as expressions of preference rather than as claims to truth, there is no reason to expect that rational argument will resolve disagreement. The very idea of moral truth has become unintelligible in a culture that has lost the frameworks within which it could be understood.
“What we have, in the moral culture of late modernity, is not a single moral language but a set of fragments from different moral languages, each with its own history and its own standards of validity, combined in ways that systematically prevent rational resolution of moral disagreements.”
Having presented and analyzed the key developments in twentieth-century moral philosophy, MacIntyre now steps back to offer his own assessment of what went wrong and what might be recovered.
PRESENT: MacIntyre identifies what he calls the central failure of twentieth-century moral philosophy: its inability to provide a rational account of moral reasoning that can withstand the pressures of modern pluralism. The project of grounding morality in universal reason, shared by Kantians, utilitarians, and contractarians alike, has collapsed because it cannot answer the question: why should I be moral? The answer must either appeal to something outside the individual’s own interests (which raises the question of why those interests should be overridden) or to the individual’s own interests (which reduces morality to prudence). Neither option is satisfactory, and both fail to capture the distinctive character of moral obligation as something that claims us independently of our desires.
MacIntyre then argues that the way forward lies in recovering the Aristotelian-Thomistic tradition that was rejected at the beginning of the modern period. This tradition does not attempt to ground morality in universal reason alone but in a teleological conception of human nature—the idea that human beings have a final end or telos that defines what it means to flourish, and that the virtues are the qualities that enable us to move from our present condition to that end. This tradition can explain why moral reasons are reasons for everyone, regardless of their contingent desires, because the human telos is universal. It can also account for the possibility of moral disagreement, because our understanding of the telos is always partial and can be refined through rational debate within a tradition.
CLARIFY: MacIntyre’s critique is not merely negative—it is not simply a diagnosis of failure—but also constructive, pointing toward a tradition that offers resources for overcoming the problems he has identified. The Aristotelian-Thomistic tradition, he argues, provides the only framework within which moral reasoning can be understood as genuinely rational and truth-seeking, rather than as the expression of emotion or the operation of social convention. However, he also acknowledges that this tradition cannot simply be revived by philosophical argument alone; it requires the existence of communities that embody its practices and transmit its virtues across generations. The task is not to return to a past golden age but to reconstruct, under radically different conditions, the forms of life that make genuine moral inquiry possible.
“The only way out of the impasse of modern moral philosophy is to recover the tradition of the virtues, understood not as a set of rules but as a set of practices that enable us to move toward our proper end. This recovery cannot be accomplished by philosophy alone; it requires the rebuilding of communities that embody the virtues in their shared life.”
This chapter deepens the discussion of truth in moral inquiry, arguing that the debate between modern moral philosophers and their critics ultimately turns on a choice between competing conceptions of rationality and truth.
PRESENT: MacIntyre distinguishes between two conceptions of rationality: the encyclopedic conception, which assumes that there is a single set of standards of rationality that any rational person can recognize, and the genealogical conception, which argues that all standards of rationality are products of power and history and cannot be justified independently of their origins. Modern moral philosophy, he argues, has been caught between these two poles: it has tried to defend the encyclopedic conception while being unable to refute the genealogical critique. The result is a stalemate in which neither side can convince the other.
MacIntyre then proposes a third alternative: the traditional conception of rationality, which holds that rational inquiry always takes place within a particular tradition of enquiry, but that traditions are capable of rational development through their own internal standards. A tradition is not a closed system but a living argument about the goods that constitute its way of life. Traditions can learn from each other through processes of epistemological crisis—when a tradition reaches a point where its own resources cannot solve problems it has generated—and can be reconstructed through tradition-constituted rationality. The test of a tradition is its ability to overcome its own crises and to make sense of its own history better than its rivals.
CLARIFY: This is perhaps the most philosophically ambitious part of the book. MacIntyre is not simply defending a particular moral theory but a whole conception of how rational inquiry works—including scientific inquiry, historical inquiry, and moral inquiry. The key move is to reject the idea that rationality requires a standpoint outside all traditions. Instead, rationality is always exercised from within some tradition, but this does not mean it is arbitrary or merely subjective, because traditions have internal standards of coherence, consistency, and adequacy that allow for genuine progress and even for the recognition that another tradition is superior. The choice between moral traditions is therefore not a matter of sheer preference but of rational judgment, though the rationality involved is that of a tradition rather than of a universal reason standing above all traditions.
“Rationality is not the possession of a universal reason that stands above all traditions, but the exercise of the capacity for rational reflection that is internal to a living tradition of enquiry. The question we face is not which theory can be justified to any rational person whatsoever, but which tradition can best make sense of our moral experience and overcome its own historical crises.”
The final chapter of the work does not offer a neat resolution but instead lays out the options available to contemporary moral philosophy and the likely paths forward.
PRESENT: MacIntyre identifies three possible futures for moral philosophy. The first is the continuation of the analytic project in its various forms—attempting to refine Kantian, utilitarian, or contractarian theories to meet the objections that have been raised against them. This project, he argues, will continue to produce sophisticated technical work but will not solve the fundamental problems he has identified, because it remains trapped within the assumptions of modern moral philosophy. The second possibility is a retreat into relativism or skepticism, accepting that moral judgments have no rational basis and that moral philosophy is therefore an illusion. This option has some attraction for philosophers who recognize the failures of the analytic project but see no alternative.
The third possibility, which MacIntyre clearly favors, is the recovery of the Aristotelian-Thomistic tradition through a process of tradition-construction. This involves not simply returning to Aristotle or Aquinas but re-appropriating their insights for contemporary conditions, showing how the tradition of the virtues can be applied to modern problems such as global justice, environmental ethics, and the moral demands of economic life. This recovery will require philosophers to work closely with historians, social scientists, and theologians, because the virtues cannot be understood apart from the social and cultural conditions that sustain them. It will also require a willingness to engage with non-Western moral traditions, which may offer resources for addressing problems that the Western tradition alone cannot solve.
CLARIFY: MacIntyre is careful not to claim that the Aristotelian-Thomistic tradition is the only viable option or that its revival is certain. He presents it as a wager—a commitment to work within a tradition whose resources he has come to find more adequate than those of its rivals, but which cannot prove its superiority within the terms of those rivals. The future of moral philosophy, he suggests, will be determined not by the force of argument alone but by the ability of philosophers to build communities of inquiry that can sustain the practices of virtue and rational debate over generations. The conclusion of the book is therefore an open one: the condition of moral philosophy in the late twentieth century is one of crisis, but crisis contains both danger and opportunity. Whether the opportunity will be realized depends on choices that are not yet made, and may not be made by philosophers alone.
