Plato's Republic: Justice, Knowledge, and the Philosopher-King

Introduction to Plato and the Republic

One of the most influential minds in Western philosophy is that of Plato. Plato lived from 428–347 B.C. and was born into an aristocratic family in the city of Athens, where he became a student of Socrates and eventually a teacher of Aristotle. Plato followed the basic ideas of Socrates, including the principle that no laws are to be broken regardless of their perceived relevance. He makes clear why laws should be followed and why disobedience to the law is rarely justified. This theme of law, self-actualization, and the justification of human thought runs through all of Plato's works.

The major argument in the Republic is the search for justice — treated as an entity rather than merely a concept. Rather than pursuing the argument of rhetoric versus philosophy, the Republic seeks to establish, through dialogue between Socrates and others, the meaning of justice, political power, and the manner in which society should be organized. In addition, Plato addresses the role of philosophy, the place of poetry, the immortality of the soul, and his famous "theory of forms" (Baird, 2008).

Justice, Knowledge, and Opinion in Book V

The section titled "The Embodiment of the Idea," and specifically Part V, "The Rule of the Philosophers," concerns how one recognizes a true philosopher — one suited for political power, one who possesses knowledge and wisdom — as distinguished from the false despot. Similarly, what philosophical views does Socrates hold in response to questions about the differences between knowledge and opinion?

For Socrates, a distinction exists between a moral individual who deserves power by virtue of their ability to understand human nature and to mitigate their own desires. Justice and injustice are like two sides of the same coin — alike but different in which side one chooses to emphasize (II, 476a).

As the text asks: "Since knowledge depended on what is, ignorance necessarily on what is not, mustn't we also seek something between ignorance and knowledge that depends on that which is between, if there is in fact any such thing?" (II, 477b).

The key seems to be "choice" — the idea that an individual, through the exercise of free will, has the ability to decide whether to pursue the fundamentals of knowledge, thereby proving the requisite underlying character and soul to surmount the difficulties therein. This distinction, combined with the way an individual views the external world, is what differentiates the lovers of opinion from the lovers of knowledge. True knowledge is the genuine pursuit of both the knowable and the unknowable (II, 479–80).

Glaucon and the Sensual Life

For Glaucon, humans are sensualists — the everyman who succumbs to his many desires based on urge and appetite: wine, song, love, sleep — without a thought to the greater good or to long-term consequences. This is epitomized in the following passage:

"For all the lovers of sights are, in my opinion, what they are because they enjoy learning; and the lovers of hearing would be some of the strangest to include among philosophers, those who would never be willing to go voluntarily to a discussion and such occupations but who — just as though they had hired out their ears for hearing — run around to every chorus at the Dionysia, missing none in the city or the villages" (II, 475d).

The key clue in this passage is the reference to the Dionysia, the festival held in honor of Dionysus, god of wine and pleasure. Rather than engaging in philosophical study, this festival was celebrated in spring over six days of plays, tragedies, feasts, and wine. Dionysus, as the inspirer of madness and ecstasy, is hardly a recommendation for a true philosopher-king. Instead, the preoccupation belongs to the sensualist who, in their own kind of "wisdom," has but two positions: on and charming, or off and degrading (Dalby, 2005).

Knowledge, on the other hand, is necessary for any action to become more than that action alone. Ignorance turns away from knowledge; opinion is an expression of knowledge based on cultural truths or undocumented hearsay. Opinion attempts to conceal fact, consisting of mere stories or boast rather than considered introspective thought. The dream state is falsehood, inspired by emotion and by greed and lust — it is easy to pursue, easy to repeat, and easy to spread, yet it simply is not true. Corruption, too, plays a role in this journey, which is in a sense an ancient version of Maslow's hierarchy of needs — a progression from the basic requirements of survival to the more complex, but equally important, needs of the soul.

Conclusion: Plato's Legacy and Political Misappropriation

The idea of elevating a philosopher to kingship, while not challenging or even unusual for a contemporary audience, must have seemed quite fantastic for Plato's original audience, who had one despot or another ruling by "divine" or "familial" right rather than by particular qualifications for the role. Within the twentieth century, it is noteworthy that political figures such as Josef Stalin, Leon Trotsky, and even Hitler regarded the Republic as a superb "resource guide" for leadership — unfortunately forgetting that one of Plato's strongest principles requires morality and accountability. An individual capable of ruling a just society must have a passion for truth, must have achieved wisdom of the Good, and must genuinely and adequately philosophize (V, 473d).

Plato's vision thus remains both aspirational and cautionary. His insistence that the philosopher-king must be morally accountable and grounded in wisdom was precisely what his twentieth-century misreaders chose to ignore. The enduring relevance of the Republic lies not in any blueprint for authoritarian control, but in its demand that those who hold power must first have mastered themselves.

References

Baird, F. and W. Kaufmann. (2008). From Plato to Derrida. Prentice Hall.

Dalby, A. (2005). The Story of Bacchus. British Museum Press.

Plato. A. Bloom, trans. (1991). The Republic. Basic Books.