Justice and the problem of ‘one man, one art’ in Plato’s Republic

By Franz S. Klein
December, 2012

            Since justice exists between individuals, it makes sense that Socrates and his interlocutors in the Republic would, as they do, construct a city in speech to perceive more clearly this central human virtue. One city becomes three in quick succession as the city of utmost necessity, the “true” city, as Socrates terms it, gives way to the city of luxury, the so-called “city of sows,” and finally to the proposal of a moderate city governed by the guardians and the philosopher-king. But underlying all the proposed cities, including the last, is Socrates’ proposition that one man ought to practice one art—that one man practicing one art causes things to become “more plentiful, finer, and easier” (370b). The proposition is readily accepted because the formation of a city automatically leads to the need for things to be more plentiful. The farmer, for example, must produce four times as much as he himself needs in the first city, the city of utmost necessity, and far more than that as the city grows beyond its four original inhabitants. It appears to be a matter of justice that he produce an ever larger amount of food because the housebuilder, the weaver, and the shoemaker are providing for all his other needs and require their own needs to be met in turn. In justice the farmer owes them food, as they, in justice, owe him a house, clothing, and shoes. The justice of the city, in other words, calls for one man to practice one art so that he can give to the others what is their due. On one hand, therefore, the proposition makes perfect sense. Leo Strauss says, “In order to be as good as possible, the city must be united or one as much as possible: every citizen must devote himself single-mindedly to a single art… Justice is simplicity.”[1]

            On the other hand, the proposition of “one man, one art” is troubling because, to me at least, it seems unnatural. Let me hasten to note that others readily accept the naturalness of the proposition. To give one example, John F. Wilson reflects on Socrates’ division of labor as follows:
There is a perfect natural division of labor and thus a perfect natural harmony, with each of us serving the needs of others by acting upon our unique, and uniquely useful, natures. Everyone has his place in the overall scheme, and that place is perfect for him or her. The human beginning is marked not by cruel chaos, as Glaucon’s speech has implied, but by association.[2]
To qualify my initial feeling of unease, I should add that I am far from denying that there is a basis of some sort for a natural division of labor as Wilson, and Socrates, suggest. In a hunter-gatherer situation, strong, young men might hunt while older men employ themselves with tasks like preparing weapons and dressing the meat. In an agricultural community, men might work in the fields while women stay inside to cook and to care for the children. The stronger, in other words, are naturally fit for tasks that require strength and endurance, while the weaker are fit for tasks matching their natural capacity. As Socrates notes to Adeimantus, “[E]ach of us is naturally not quite like anyone else, but rather differs in his nature; different men are apt for the accomplishment of different jobs.”[3]

          To this proposition, Adeimantus rightly agrees. Different men are more inclined toward some tasks than others. But Socrates takes things a step further, asking, “And what about this? Who would do a finer job, one man practicing many arts, or one man one art?”[4] Adeimantus chooses the latter, granting Socrates leave to give the proposition its final form: “So, on this basis each thing becomes more plentiful, finer, and easier, when one man, exempt from other tasks, does one thing according to nature and at the crucial moment.”[5] In describing a “perfect natural harmony,” Wilson must be presuming that it is a man doing a single thing that is, for Socrates, “according to nature.” But Allan Bloom’s translation is ambiguous on this point. Is “one man, one art” according to that man’s nature, as Wilson assumes, or does one man doing one thing permit that man to do that thing according to that thing’s nature? Other translations are less ambiguous than Bloom’s. Paul Shorey translates the proposal, “[M]ore things are produced, and better and more easily when one man performs one task according to his nature, at the right moment, and at leisure from other occupations.” B. Jowett renders it, “[A]ll things are produced more plentifully and easily and of a better quality when one man does one thing which is natural to him and does it at the right time, and leaves other things.” Nonetheless, the Greek is ambiguous: “when a certain man practices a certain thing according to nature,” “ὅταν εἷς ἓν κατὰ φύσιν…πράττῃ.”

          The insertion of “its” instead of “his”—“when a certain man practices a certain thing according to its nature”—is both reasonable because of the context in which Socrates makes this statement and dodges the problematic claim that “one man, one art” accords perfectly with human nature. Socrates has just argued that a man needs the freedom that having a single occupation gives him because the thing to be done is not “willing to await the leisure of the man who does it.”[6] The farmer, for example, must harvest his crops before the first frost. The housebuilder cannot put up houses during the spring rains. The occupations of farming and housebuilding have natures according to which they must be carried out if they are to be, in Socrates’ words, “more plentiful, finer, and easier.”[7] The farmer and housebuilder, on the other hand, must bend their natures to the natures of their professions in order to meet the demands the city places upon them in justice.

          What difference does the choice of possessive pronoun make? To start with, if I am wrong and Socrates is in fact saying that one man ought to do one thing because it is his nature to do that one thing, then he fails to support his claim. It is one thing to say that people are naturally inclined to perform one job over another but another to say that people are naturally inclined to perform a particular task—that each person finds a “soulmate,” so to speak, in a particular vocational activity and would be unhappy in any other vocational activity. It might be the case that the city of utmost necessity, and each of the cities that follows, requires its citizens to practice a single art out of justice to their fellow citizens. But that is a different argument. The argument that one man ought to practice one art because he is, by nature, inclined to do so is simply never made. In fact, it appears to me to be unnatural to practice a single art because it divorces one from the natural diversity of occupations that would permit him to explore complementary strengths and to remedy areas of weakness, achieving a sort of interior balance. Farming, for example, is an art that might allow a man to better himself in some ways, but it might also keep him from contemplation if it is all he does. The solitary life of the philosopher, on the other hand, might lead to great insight into justice, but working with his own hands might help the philosopher develop even greater insight. Cicero, after all, says farming is the life of the true philosopher, the beautifully cultivated fields and orderly olive groves being the places where justice is most readily perceived.[8]

           The second interpretation—that a man ought to practice one thing according to its nature—better fits the demands that justice places upon the inhabitants of the city of utmost necessity, in which context Socrates has made the proposal. The farmer, for example, must feed all of the city’s inhabitants out of justice because they took care of his other needs. The housebuilder is fed and clothed and must therefore provide shelter for his fellow citizens. If the farmer attends to the nature of farming or housebuilder to the nature of housebuilding, the results become “more plentiful, finer, and easier.” The farmer and housebuilder are able to fulfill the demands the city places on them in justice. But even this is problematic because, again, it means that the inhabitants must bend their natures to the natures of their professions in order to meet the city’s just but onerous demands. The problem that the second interpretation exposes, therefore, appears to be with the city itself.

           Is the unified city as Socrates conceives of it, to use Strauss’ description, “good” for its inhabitants? The answer is not to be found in the city of utmost necessity because Socrates and his interlocutors quickly abandon that first city as being impractical. The feverish quest to fulfill the onerous demands of justice and to exploit the nature of the professions—for the farmer, for example, to get as much food out of the ground and  to feed as many people as possible—leads to the addition of plowmakers, cowherds, and shepherds; then there need to be merchants, sailors, and tradesmen. Finally, Glaucon’s perceived need for relishes leads to the “city of sows,” the “luxurious city,” the “feverish city” replacing the city of utmost necessity. Socrates accepts the transition to the “city of sows” not because it is better—in fact, he sadly bids farewell to the city of utmost necessity as having been the “true” and the “healthy” city—but in light of the original proposition: to see “in what way justice and injustice naturally grow in cities.”[9] He is accepting, in other words, that the city of utmost necessity, in growing beyond necessity as the number of occupations grows beyond the initial four, will not be content with the relishes of salt, olives, cheese, and boiled onions. Glaucon had just prodded him, implying that people will not be content with this rustic simplicity, “If you were providing for a city of sows, Socrates, on what else would you fatten them than this?”[10] The city of utmost necessity is necessitous of more than itself. It proposes a self-sufficiency based on reciprocal justice but needs to expand as desire exceeds the bounds of justice.

          While “one man, one art” was proposed as a means to fulfill the dictates of justice that the city of utmost necessity places upon its citizens, it causes the city to outgrow itself because it subjects the nature of man to the nature of his profession, chaining him to an assembly line where he is obligated to churn out houses, food, clothes, or shoes. Recognizing the need to dampen the desire fueling this insatiable growth and making the demands of justice ever heavier, Socrates and his interlocutors propose the moderate city governed by the guardians and the philosopher-king. The guardians will be schooled in justice, living and eating in common; they will practice the same gymnastics, listen to the same music, and have relations with the same women. They will be denied money, possessions, and all private property. “And thus,” Socrates says, “they would save themselves as well as save the city.”[11] But the same problem besets the guardians, at least, as beset the original city’s inhabitants. Although their education is supposed to teach them justice, their natures end up being forced into the unnatural mold of the new profession—that of guardians—that Socrates and the others have devised for them. Aristotle’s famous critique of the Republic picks up on this:
Is it not obvious that a state may at length attain such a degree of unity as to be no longer a state?—since the nature of a state is to be a plurality, and in tending to greater unity, from being a state it becomes a family, and from being a family, an individual; for the family may be said to be more than the state, and the individual than the family. So that we ought not to attain this greatest unity even if we could, for it would be the destruction of the state.[12]
Aristotle’s complaint, Patrick Coby explains, is that the Republic’s institutions “impose a oneness of life and thought that suffocates the individual and stifles his moral growth. Morality, Aristotle believes, depends on diversity.”[13]

            If Strauss is right that the Platonic dialogues “do not convey a teaching, but, being a monument to Socrates, present the Socratic way of life as a model,”[14] then perhaps Aristotle’s critique—and mine—are unimportant. Perhaps Socrates never actually meant for his city to be enacted as such. Claes G. Ryn summarizes this position succinctly:
Many of Plato’s admirers argue that his political scheme must not be taken too literally. The Republic is not a roadmap for practical politics. It sets before us an image of perfection, which, even if it cannot be realized, imparts the lofty spirit of good. The main purpose of the Platonic ideal is to found justice in the soul of the individual. And just persons may elevate politics.”[15]
For Ryn, however, the problem with the Republic is that the philosopher is asked to transcend everyday life, rising above its obligations, duties, and demands, in order to establish justice in his soul. He only returns to the worldly milieu grudgingly when it is his turn to undertake, for a time at least, the distasteful task of ruling; ordered as it is, the city is not so much just as it is the best situation for the philosopher who is seeking justice for himself. But if Strauss is right, then the focus should turn to Socrates’ interlocutors and to readers of the Republic. Are they, like the guardians and the philosophers of a city that was apparently never meant to be, really made more just by participating in the dialogue or by reading it? Does the Socratic way of life, in other words, make them persons who will have the potential and the ability to elevate politics? Or is Socrates guilty of the age-old charge of corrupting the youth?

           Not even Ryn is willing to throw the baby out with the bathwater. Speaking about Plato’s and Aristotle’s twin emphases on the education of the young, he writes that it is “entirely consistent to endorse this insight and to insist that the two Greeks, especially Plato, do not sufficiently understand and appreciate individual personhood and the need for individual freedom.”[16] Indeed. But one might wonder if only the baby can be saved. To put it another way, could the city of the Republic also be saved, not just the dialogue’s insight about the importance of education? If so, then the necessary reconsideration would need to begin with the foundational proposition of “one man, one art.” I wonder how Socrates might have proceeded if Adeimantus had objected to this foundational principle right away. After all, the ambiguity of the Greek text practically begs Socrates’ interlocutors to press him on the point. If Socrates meant that one man ought to practice one art according to that art’s nature, then Adeimantus might have questioned the onerous demands of the city of utmost necessity. Shouldn’t the nature of a city follow from the nature of man rather than the other way around? Shouldn’t the situation that best cultivates justice and equanimity within individual souls be the starting point for the collective of individuals, not just the ending point for the fortunate few who are chosen to guard the city? In any case, the city of utmost necessity and all the cities that follow fall short in this regard in subjecting the nature of man to the nature of his occupation. There are also grounds for reconsideration if Socrates had meant, as so many translators have assumed, that a man ought to practice one art according to his nature. Adeimantus could have challenged Socrates on this too since it is evident that diversity in the soul, as well as in the city, fosters right order and justice.

           Justice in the soul, it seems, is not simplicity. Perhaps if he were pressed, Socrates would have acknowledged that such a diversity is a good—even a natural—thing. After all, his vision of education presupposes just such a balance between music and gymnastics for the guardians. Why would it be any different for the inhabitants of the original city? Frederick Rosen makes the interesting point that “[o]nce formed, a society by definition would be assumed to meet the basic needs of its members.”[17] This is the underlying principle of justice that leads Adeimantus to agree that each inhabitant of the city of utmost necessity must put his work at the disposal of all in common. The farmer has the basic need of a house, the housebuilder of clothing, etc. But need the farmer, in justice, submit to the onerous demand that he provide all the food? Need the housebuilder build all the houses? In short, the answer is no; it does not follow that the farmer provide all the food because not only is the housebuilder capable of balancing his main occupation with secondary occupations, but it might also be beneficial for the housebuilder as a human being to foster this diversity among his occupations for the justice and equanimity of soul that it will bring him. Justice in the human soul is not simple, but complex. Socrates might note that such a city, where people have more responsibility for their own basic needs, would be less likely to expand so rapidly into the luxurious city because the nature of the profession is secondary to the nature of the individual, but recall his reluctance to leave what he called the “true” city. Indeed, if justice can be readily perceived—and learned from—in this first city, then what need have Socrates and his interlocutors—and Plato’s readers—of the city of sows and the city conceived to moderate that city’s excesses?



Works Cited

Aristotle. Politics. In The Basic Works of Aristotle. Translated by B. Jowett. New York: Modern Library, 2001.
Cicero. On Old Age, On Friendship, On Divination. Translated by W.A. Falconer. Cambridge: Harvard University Press, 1963.
Coby, Patrick. “Aristotle’s Three Cities and the Problem of Faction.” The Journal of Politics 50, no. 4 (1988): 806-919.
Plato. Republic. In Five Great Dialogues of Plato. Translated by B. Jowett. New York: Classics Club, 1942.
---. The Republic of Plato. Translated by Allan Bloom. 2nd edition. New York: Basic Books, 1991.
---. Republic, With an English Translation. 2 volumes. Translated by Paul Shorey. Cambridge: Harvard University Press, 1970.
Rosen, Frederick. “Basic Needs and Justice.” Mind 86, no. 341 (1977): 88-94.
Ryn, Claes G. “The Politics of Transcendence: The Pretentious Passivity of Platonic Idealism. Humanitas 12, no. 2 (1999): 4-26.
Strauss, Leo. The City and Man. Chicago: Rand McNally, 1964.
Wilson, John F. The Politics of Moderation: An Interpretation of Plato’s Republic. Lanham, MD: University Press of America, 1984.



[1] Leo Strauss, The City and Man, 101.

[2] John F. Wilson, The Politics of Moderation, 13-14.

[3] Plato, Republic, 370a-b. I am using Allan Bloom’s translation, except where otherwise noted, and consulting the Loeb edition of the Greek.

[4] Plato, Republic, 370b.

[5] Plato, Republic, 370c.

[6] Plato, Republic, 370b.

[7] Plato, Republic, 370b.

[8] See Cicero, On Old Age, 15.

[9] Plato, Republic, 372e.

[10] Plato, Republic, 372d.

[11] Plato, Republic, 417a.

[12] Aristotle, Politics, 1261.

[13] Patrick Coby, “Aristotle’s Three Cities and the Problem of Faction,” 897.

[14] Leo Strauss, The City and Man, 51.

[15] Claes G. Ryn, “The Politics of Transcendence,” 15.

[16] Claes G. Ryn, “The Politics of Transcendence,” 9.

[17] Frederick Rosen, “Basic Needs and Justice,” 89.


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