Nicomachean Ethics

Summary

The Nicomachean Ethics (c. 340 BCE) is Aristotle’s principal work on moral philosophy, organized around the question of what constitutes the good life for a human being. Its answer — eudaimonia, a life of activity in accordance with virtue, guided by practical wisdom — became the foundation of Western virtue ethics. The text matters to the history of medicine for two reasons. First, Aristotle used medicine repeatedly as his chief example of a practical art that requires more than rule-following: the physician, like the navigator and the moral agent, must judge rightly in particular circumstances where no universal rule suffices. Second, the concept of phronesis (practical wisdom) that the Ethics defines became, in the twentieth century, the dominant philosophical model for understanding what clinical judgment actually is and why it cannot be reduced to applied science.

Medicine as Aristotle’s Model Art

Aristotle did not write the Nicomachean Ethics as a medical text. But he reached for medicine more than any other domain when he needed to show what practical reasoning looks like from the inside. The Ethics compares knowing in moral matters to knowing in medicine and describes practical reasoning, or phronesis, as their shared characteristic virtue.(Montgomery, 2006) In both fields, Aristotle argues, “questions about actions and expediency, like questions about health, have no fixed and invariable answers.”(Montgomery, 2006) The inquiries are particular, circumstantial, and necessarily uncertain — and for that reason, the type of account one demands should reflect the subject matter rather than aspire to the precision of mathematics or astronomy.

Montgomery identifies this as one of Aristotle’s sharpest interventions: the claim that there can be “no science of individuals” — that the kind of knowledge directed at a particular patient or a particular moral situation is categorically different from the kind of knowledge that deals in universals.(Montgomery, 2006) Aristotle’s physician does not simply apply a rule to a case. The physician must judge what the rule means in this body, under these conditions, at this moment. The navigation metaphor is instructive: Aristotle compares physicians and moral agents to navigators, all of whom exercise a “flexible, interpretive capacity” to “determine the best action to take when knowledge depends on circumstance.”(Montgomery, 2006)

This analogy was not incidental. It was the structural argument of the text. Aristotle needed his readers to understand that ethics is a practical discipline — not a branch of theoretical knowledge like physics or metaphysics, but an art directed at action. Medicine served as the clearest available demonstration of this point because every educated Greek knew that a competent physician could not heal by formula alone. The good doctor had to see the particular patient. By linking ethics to medicine at every turn, Aristotle was doing two things at once: arguing that ethics is practical rather than theoretical, and implying that the physician’s intelligence — flexible, perceptive, responsive to context — is a form of genuine rationality, not a lesser kind of knowing.

Phronesis and Clinical Judgment

The concept that has most deeply shaped medicine’s reception of the Nicomachean Ethics is phronesis — practical wisdom, the intellectual virtue that enables right action in particular circumstances. Aristotle distinguishes phronesis from several other kinds of knowing. Montgomery, following the text closely, describes phronesis as “an interpretive, making-sense-of-things way of knowing that takes account of context, unpredicted variables, and the process of change over time.”(Montgomery, 2006) It is contrasted with episteme (scientific knowledge, which deals in invariable truths) and sophia (speculative wisdom, truth pursued for its own sake).(Pellegrino, 1993) Where episteme grasps necessary relations and sophia contemplates eternal truths, phronesis works in the realm of what could be otherwise — human affairs, bodily conditions, weather, war, cooking, seamanship.

Pellegrino and Thomasma describe phronesis as “the capstone virtue, the link between the intellectual and the moral life,” the virtue that “disposes us habitually to attain truth for the sake of action, as opposed to truth for its own sake.”(Pellegrino, 1993) This is the formulation that has mattered most to medical ethics. Phronesis is not merely cleverness, and it is not merely technical skill. It is the capacity to perceive what is called for — what the right action is, in this situation, for this person — and to act on that perception. Without it, a physician might possess extensive scientific knowledge and still fail to serve the patient, because the gap between knowing the relevant facts and knowing what to do with them in a given case is exactly the gap that phronesis bridges.

Montgomery argues that medicine’s “essential virtue” is clinical judgment, “the practical reasoning or phronesis that enables physicians to fit their knowledge and experience to the circumstances of each patient.”(Montgomery, 2006) She connects this to Bourdieu’s concept of habitus and to the formation of clinical character through apprenticeship: physicians absorb practical wisdom through doing, watching, and being corrected, not through memorizing rules.(Montgomery, 2006) The values of clinical practice — attention to the patient, reliance on perception, thoroughness, skepticism — are character traits absorbed covertly through apprenticeship, and they are the practical expression of what Aristotle was describing in the Ethics.

The irreducibility of phronesis has been a persistent theme in twentieth-century philosophy of medicine. Pellegrino and Thomasma argue that prudence — the Latin and Thomistic rendering of phronesis — “cannot be reduced to probability calculus, stochastic reasoning, or game theory,” because “at every junction in moral algorithm construction, some prudential assessment of competing values must be made, and the moral quality of the decision depends on the quality of that virtue.”(Pellegrino, 1993) Montgomery makes the same point from a different direction: evidence-based medicine cannot replace clinical judgment because EBM’s answers “are useless without a clearly asked clinical question,” and formulating that question is itself an exercise of phronesis.(Montgomery, 2006) Toulmin, writing in the philosophy of science, extends the claim further: even in seventeenth-century natural philosophy, “our ability to recognize those situations to which these deductions apply rests, as much, on the practical wisdom that Aristotle called phronesis” — that familiarity with how things actually work in practice that allows one to recognize which theory is relevant to a given case.(Carson_Burns_eds, 1997) If phronesis is irreducible even in physics, it is obviously irreducible in medicine.

The practical consequence is that phronesis mediates every clinical decision where competing goods must be weighed. Pellegrino and Thomasma argue that there is “no formula or calculus by which the physician can determine with accuracy at what point to strike the balance between compassion and objectivity, both of which are intrinsic to the healing end of medicine.”(Pellegrino, 1993) Prudence is not a method. It is not casuistry, which Josef Pieper warned should not be confused with prudence: “casuistry is a method that depends upon the proper use of prudence, but it is not prudence itself.”(Pellegrino, 1993) Prudence is a virtue — a habitual disposition of character. It can be cultivated but not formalized.

Virtue Ethics and the Physician

The Nicomachean Ethics provided more than phronesis. It supplied the entire architecture of virtue ethics that Pellegrino and Thomasma built into a systematic medical ethics in the late twentieth century. Aristotle defined virtue as “a habitual disposition to act well under the guidance of reason, linking character to moral action.”(Pellegrino, 1993) The virtues are not feelings or natural talents; they are states of character achieved through repeated practice — hexis, a settled orientation. This definition ran through the classical and medieval periods and, as Pellegrino and Thomasma note, “subsequent definitions have not improved on the essential notion.”(Pellegrino, 1993)

The specific virtues Aristotle examined in the Ethics map onto clinical practice with surprising directness. Courage, for Aristotle, is the mean between cowardice and rashness with respect to fear and confidence; Pellegrino and Thomasma apply this structure to the physician who must advocate for patients without tipping into counterproductive zealotry — “not stirring the waters is cowardice because it leaves patients without advocacy, but stirring the waters too much and too publicly is rashness.”(Pellegrino, 1993) Temperance is the mean with regard to pleasures; Aristotle argues that intemperance is “a voluntary state of soul in which hedonism and a lust for power predominate over wisdom about the body.”(Pellegrino, 1993) Pellegrino and Thomasma redeploy this as the physician’s temptation to overuse medical technology or to “play God” through an inappropriate exercise of technical power. Justice, in Aristotle’s account, comprises distributive, commutative, and rectificatory dimensions — “the habit of giving another her due” — with the key distinction lying between giving what is due on grounds of the common good and on grounds of individual good.(Pellegrino, 1993)

The organizing claim of Pellegrino and Thomasma’s project is that phronesis links all these particular virtues together. Prudence “occupies a special place among the virtues as the link between the intellectual virtues and those that dispose to good character.”(Pellegrino, 1993) It may even, they suggest, “link the emotions with the virtues, perhaps closing the gap between cognition of the good and motivation to do the good, because it combines reason with disposition.”(Pellegrino, 1993) Clinical judgment, on this account, “is essentially an exercise of prudence: the right way of acting in a complex situation fraught with uncertainties, requiring the clinician to discern appropriate means to healing ends and balance benefits against harms.”(Pellegrino, 1993) And a physician who habitually exercises prudence “moves toward happiness and fulfillment” — toward eudaimonia itself — because “to pursue medicine virtuously is to move toward a satisfying life in at least one sector of life.”(Pellegrino, 1993)

This framework had a specific historical context. Pellegrino and Thomasma describe the history of virtue theory as dividing into four periods: classical-medieval centrality, postmedieval reshaping, positivist-analytical decline, and contemporary resuscitation.(Pellegrino, 1993) The postmedieval erosion was driven by empiricism, rights-based individualism, moral sentiment theory, and deontology, “shifting emphasis from agent character to acts and principles.”(Pellegrino, 1993) The most influential work of the contemporary revival was MacIntyre’s After Virtue (1981), which defined virtues as dispositions necessary to attain goods internal to communal practices.(Pellegrino, 1993) Pellegrino and Thomasma built on MacIntyre but grounded their theory specifically in the phenomenology of the clinical relationship — the vulnerability of the sick person, the inherent inequality of the encounter, and the fiduciary character of the physician’s promise to help.

Transmission and Reception

The Nicomachean Ethics reached medieval Europe through a complicated transmission history that included both direct Greek-to-Latin translation and Arabic intermediaries. The earliest Latin translations of Books I, II, and III are now attributed to Burgundio of Pisa, a twelfth-century translator working directly from Greek rather than through Arabic.(Burnett, 2009) The complete text, however, was not available in Latin until the mid-thirteenth century, and its arrival coincided with the broader wave of Aristotelian texts entering the Latin West.

The Arabic transmission followed a different path. Al-Farabi (d. 950) wrote a commentary on the Nicomachean Ethics — now lost — in which, according to the report of Ibn Tufayl, he “went beyond dismissal of eternal punishments for the wicked and held that all hopes of happiness beyond this life are senseless ravings and old wives’ tales.”[good-av13-ch03-005] Al-Farabi’s denial of personal immortality, grounded in his reading of Aristotle, was part of the larger tension between Aristotelian philosophy and Islamic theology that would shape the reception of the Ethics in both the Islamic and Christian worlds.

At the court of Frederick II in thirteenth-century Sicily, Theodore of Antioch — a Christian Arab philosopher trained under Kamal al-Din ibn Yunus in Mosul — may have been part of the team that completed the translation of the Nicomachean Ethics into Latin.(Burnett, 2009) Burnett notes that Theodore “would have had excellent qualifications for joining this team, because of his knowledge of Arabic and his training in philosophy.” The Long Prologue attributed to Theodore adapted Aristotle’s ethical examples to Frederick’s court hierarchy, substituting “the king, the priest, the soldier, the judge, and the philosopher” for Aristotle’s original examples, culminating in a claim that philosophy needs ruling power — an echo, as Burnett observes, of the Platonic ideal of the philosopher-king.(Burnett, 2009)

Thomas Aquinas’s encounter with the full Nicomachean Ethics in the thirteenth century was the most consequential moment in the text’s reception history for medical thought, even though its effects would not be felt in medical ethics for centuries. Aquinas “synthesized Aristotelian natural virtues with Christian theological virtues, giving special prominence to prudence as the bridge between moral and intellectual virtues.”(Pellegrino, 1993) He enriched Aristotle’s phronesis into the concept of prudence — recta ratio agibilium, “a right way of acting” — extending its range to include the supernatural virtues of faith, hope, and charity alongside Aristotle’s moral and intellectual virtues.(Pellegrino, 1993) This Thomistic synthesis preserved the Aristotelian structure while embedding it in a Christian metaphysics, and it remained the dominant philosophical framework for virtue until the early modern period.

The early modern disruption of this tradition came not from a rival reading of Aristotle but from the rejection of virtue ethics as a framework. Hobbes broke explicitly with the Nicomachean Ethics on the nature of human sociality: “Aristotle opens his Politics by asserting that man is a social animal,” Pellegrino and Thomasma note; “man, Hobbes said, is unsocial by nature.”(Pellegrino, 1993) This inversion — the claim that society is a pragmatic compact among self-interested individuals rather than an expression of human nature — undermined the Aristotelian premise that virtues are excellences of a naturally social being. The subsequent tradition, from Locke through Hume and Bentham to Mill, shifted ethics away from the agent’s character and toward the analysis of acts, duties, and consequences.(Pellegrino, 1993)

The twentieth-century recovery of the Nicomachean Ethics for medicine happened through two channels. Toulmin argued that the “postmodern collapse of foundationalism” was in fact a recovery of “a pre-Cartesian Aristotelian tradition in which practice has primacy over theory.”(Carson_Burns_eds, 1997) Montgomery pushed the argument into clinical epistemology, demonstrating that medicine’s rationality is better described by Aristotle’s practical philosophy than by any available model of scientific reasoning. And Pellegrino and Thomasma, explicitly adopting “the classical definitions of Aristotle and Thomas Aquinas,“(Pellegrino, 1993) made the Ethics the foundation for a systematic account of what physicians owe their patients and what kind of people they need to become.

One further reception deserves mention. Pedro Lain Entralgo rooted his concept of “medical philia” directly in the Nicomachean Ethics, where friendship motivated by mutual goodwill is presented as essential to human happiness. Montgomery, however, notes the limitation: adopting the Greek ideal of physician-as-friend “must ignore the class structure of slaveholding Athens,” and “readers must imagine themselves rich, free men who deserve the comradeship of their physician.”(Montgomery, 2006) The Aristotelian model of friendship was never designed as a universal ethic. Its translation into a professional relationship between physician and patient — any patient, regardless of status — requires a normative extension that the text itself does not support.

See Also

• aristotle — the author and his broader influence on medicine
• phronesis — the concept of practical wisdom defined in this text
• virtue-ethics — the moral tradition the text founded
• clinical-judgment — the modern medical concept most indebted to the text
• thomas-aquinas — the Thomistic synthesis of Aristotelian and Christian virtue
• canon-of-medicine — Ibn Sina’s medical work, shaped by the Aristotelian tradition
• hippocratic-corpus — the medical texts Aristotle drew on as examples
• after-virtue — MacIntyre’s revival of Aristotelian ethics that influenced Pellegrino

Sources

Evidence cards used in this entry:

Footnotes