复盘|The History of Philosophy--Plato

I.The Context of Plato

If you look at a map of Europe you will observe that Greece is a skeleton-like hand stretching its crooked fingers out into the Mediterranean Sea. 

Greece was broken into isolated fragments by the natural barriers of sea and soil; every valley therefore developed its own self-sufficient economic life, its own sovereign government, its own institutions and dialect and religion and culture. In each case one or two cities, and around them, stretching up the mountainslopes, an agricultural hinterland.

Athens is the farthest east of the larger cities of Greece. It was favorably placed to be the door through which the Greeks passed out to the busy cities of Asia Minor, and through which those elder cities sent their luxuries and their culture to adolescent Greece. It had an admirable port, Piræus, where countless vessels might find a haven from the rough waters of the sea. And it had a great maritime fleet.

In 490–470 B.C. Sparta and Athens fought off the effort of the Persians to turn Greece into a colony of an Asiatic empire. In this struggle of youthful Europe against the senile East, Sparta provided the army and Athens the navy. The war over, Sparta demobilized her troops, and suffered the economic disturbances natural to that process; while Athens turned her navy into a merchant fleet, and became one of the greatest trading cities of the ancient world. Sparta relapsed into agricultural seclusion and stagnation, while Athens became a busy mart and port, the meeting place of many races of men and of diverse cults and customs, whose contact and rivalry begot comparison, analysis and thought.

Gradually, too, they were developing science; mathematics grew with the increasing complexity of exchange, astronomy with the increasing audacity of navigation. The growth of wealth brought the leisure and security which are the prerequisite of research and speculation; men now asked the stars not only for guidance on the seas but as well for an answer to the riddles of the universe; 

the first Greek philosophers were astronomers.

Men grew bold enough to attempt natural explanations of processes and events before attributed to supernatural agencies and powers; magic and ritual slowly gave way to science and control; and philosophy began.

At first this philosophy was physical; it looked out upon the material world and asked what was the final and irreducible constituent of things. The natural termination of this line of thought was the materialism of Democritus (460–360 B.C.). This was one of the main streams of Greek speculation; it passed underground for a time in Plato’s day, but emerged in Epicurus (342–270), and became a torrent of eloquence in Lucretius (98–55 B.C.). 

But the most characteristic and fertile developments of Greek philosophy took form with the Sophists, travelling teachers of wisdom, who looked within upon their own thought and nature, rather than out upon the world of things. 

In politics they divided into two schools. One, like Rousseau, argued that nature is good, and civilization bad. Another school, like Nietzsche, claimed that nature is beyond good and evil.

No doubt this attack on democracy reflected the rise of a wealthy minority at Athens which called itself the Oligarchical Party, and denounced democracy as an incompetent sham.

II. Socrates

Socrates was as far from being handsome as even a philosopher can be. We know so little about him, and yet we know him so much more intimately than the aristocratic Plato or the reserved and scholarly Aristotle. 

How the master lived hardly anybody knew. He never worked, and he took no thought of the morrow. He ate when his disciples asked him to honor their tables; they must have liked his company, for he gave every indication of physiological prosperity. He was not so welcome at home, for he neglected his wife and children; and from Xanthippe’s point of view he was a good-for-nothing idler who brought to his family more notoriety than bread. Yet she, too, loved him, and could not contentedly see him die even after three-score years and ten.

Socrates: Know thyself.

1.Socratic method

this demand for accurate definitions, and clear thinking, and exact analysis, objected that he asked more than he answered, and left men’s minds more confused than before. Nevertheless he bequeathed to philosophy two very definite answers to two of our most difficult problems—What is the meaning of virtue? and What is the best state?

2.destroyed the faith of the youths

No topics could have been more vital than these to the young Athenians of that generation. The Sophists had destroyed the faith these youths had once had in the gods and goddesses of Olympus, and in the moral code that had taken its sanction so largely from the fear men had for these ubiquitous and innumerable deities; apparently there was no reason now why a man should not do as he pleased, so long as he remained within the law. A disintegrating individualism had weakened the Athenian character, and left the city a prey at last to the sternly-nurtured Spartans. 

It was his reply to these questions that gave Socrates death and immortality. 

If, for example, good meant intelligent, and virtue meant wisdom; if men could be taught to see clearly their real interests, to see afar the distant results of their deeds, to criticize and coördinate their desires out of a self-cancelling chaos into a purposive and creative harmony—this, perhaps, would provide for the educated and sophisticated man the morality which in the unlettered relies on reiterated precepts and external control. 

3.Who should rule the state?

No wonder an Alcibiades turns against a state that distrusts ability, and reverences number more than knowledge. No wonder there is chaos where there is no thought, and the crowd decides in haste and ignorance, to repent at leisure and in desolation. 

Imagine the reaction of the popular party at Athens to this aristocratic gospel at a time when war seemed to require the silencing of all criticism, and when the wealthy and lettered minority were plotting a revolution.

4. The death of Socrates

Then the revolution came, and men fought for it and against, bitterly and to the death. When the democracy won, the fate of Socrates was decided: he was the intellectual leader of the revolting party, however pacific he might himself have been; he was the source of the hated aristocratic philosophy; he was the corrupter of youths drunk with debate. It would be better, said Anytus and Meletus, that Socrates should die.

They had the power to pardon him; he disdained to make the appeal. It was a singular confirmation of his theories, that the judges should wish to let him go, while the angry crowd voted for his death. 

So they decreed that he should drink the hemlock. His friends came to his prison and offered him an easy escape; they had bribed all the officials who stood between him and liberty. He refused. He was seventy years old now (399 B.C.); perhaps he thought it was time for him to die, and that he could never again die so usefully. 

Such was the end of our friend, whom I may truly call the wisest, the justest, and best of all the men whom I have ever known.

III. Plato

1. The Preparation of Plato

Plato’s meeting with Socrates had been a turning point in his life. He had been brought up in comfort, and perhaps in wealth; he was a handsome and vigorous youth. Philosophers are not apt to develop out of such an adolescence. But Plato’s subtle soul had found a new joy in the “dialectic” game of Socrates.He became a very passionate lover of wisdom, and of his teacher. 

He was twenty-eight when the master died; and this tragic end of a quiet life left its mark on every phase of the pupil’s thought. It filled him with such a scorn of democracy, such a hatred of the mob, as even his aristocratic lineage and breeding had hardly engendered in him; it led him to a Catonic resolve that democracy must be destroyed, to be replaced by the rule of the wisest and the best. It became the absorbing problem of his life to find a method whereby the wisest and the best might be discovered, and then enabled and persuaded to rule.

Meanwhile his efforts to save Socrates had marked him out for suspicion by the democratic leaders; his friends urged that Athens was unsafe for him, that it was an admirably propitious moment for him to see the world. And so, in that year 399 B.C., he set out. 

 He seems to have gone first to Egypt; and  then off he sailed to Sicily, and to Italy. 

Twelve years he wandered, imbibing wisdom from every source, sitting at every shrine, tasting every creed. Some would have it that he went to Judea and was moulded for a while by the tradition of the almost socialistic prophets; and even that he found his way to the banks of the Ganges, and learned the mystic meditations of the Hindus. 

He returned to Athens in 387 B.C., a man of forty now, ripened to maturity by the variety of many peoples and the wisdom of many lands. He had lost a little of the hot enthusiasms of youth, but he had gained a perspective of thought in which every extreme was seen as a half-truth, and the many aspects of every problem blended into a distributive justice to every facet of the truth. He had knowledge, and he had art; for once the philosopher and the poet lived in one soul; and he created for himself a medium of expression in which both beauty and truth might find room and play—the dialogue. 

The difficulty in understanding Plato lies precisely in this intoxicating mixture of philosophy and poetry, of science and art; we cannot always tell in which character of the dialogue the author speaks, nor in which form; whether he is literal or speaks in metaphor, whether he jests or is in earnest. His love of jest and irony and myth leaves us at times baffled; almost we could say of him that he did not teach except in parables. 

Let us confess, too, that Plato has in sufficient abundance the qualities which he condemns. 

The Dialogues remain one of the priceless treasures of the world. The best of them, The Republic, is a complete treatise in itself, Plato reduced to a book. It is a feast for the élite, served by an unstinting host. “Plato is philosophy, and philosophy Plato,” says Emerson; and awards to The Republic the words of Omar about the Koran: “Burn the libraries, for their value is in this book.”

2. The Ethical Problem

The discussion takes place in the house of Cephalus, a wealthy aristocrat. In the group are Glaucon and Adeimantus, brothers of Plato; and Thrasymachus, a gruff and excitable Sophist. Socrates, who serves as the mouthpiece of Plato in the dialogue, asks Cephalus: “What do you consider to be the greatest blessing which you have reaped from wealth?”

Cephalus answers that wealth is a blessing to him chiefly because it enables him to be generous and honest and just. Socrates, after his sly fashion, asks him just what he means by justice; and therewith lets loose the dogs of philosophic war. For nothing is so difficult as definition, nor anything so severe a test and exercise of mental clarity and skill. Socrates finds it a simple matter to destroy one after another the definitions offered him; until at last Thrasymachus, less patient than the rest, breaks out “with a roar”:

“What folly has possessed you, Socrates? And why do you others all drop down at one another’s feet in this silly way? I say that if you want to know what justice is, you should answer and not ask, and shouldn’t pride yourself on refuting others . . . . For there are many who can ask but cannot answer” (336).

Socrates is not frightened; he continues to ask rather than answer; and after a minute of parry and thrust he provokes the unwary Thrasymachus to commit himself to a definition:


He points out that justice is a relation among individuals, depending on social organization; and that in consequence it can be studied better as part of the structure of a community than as a quality of personal conduct. If, he suggests, we can picture a just state, we shall be in a better position to describe a just individual. Plato excuses himself for this digression on the score that in testing a man’s vision we make him read first large type, then smaller; so, he argues, it is easier to analyze justice on a large scale than on the small scale of individual behavior. But we need not be deceived: in truth the Master is patching two books together, and uses the argument as a seam. He wishes not only to discuss the problems of personal morality, but the problems of social and political reconstruction as well. He has a Utopia up his sleeve, and is resolved to produce it. It is easy to forgive him, for the digression forms the core and value of his book.


3. The Political Problem

Justice would be a simple matter, says Plato, if men were simple; an anarchist communism would suffice. 

Because of greed and luxury, men are not content with a simple life: they are acquisitive, ambitious, competitive, and jealous; they soon tire of what they have, and pine for what they have not; and they seldom desire anything unless it belongs to others. The result is the encroachment of one group upon the territory of another, the rivalry of groups for the resources of the soil, and then war. 

These changes in the distribution of wealth produce political changes: as the wealth of the merchant over-reaches that of the land-owner, aristocracy gives way to a plutocratic oligarchy—wealthy traders and bankers rule the state. Then statesmanship, which is the coordination of social forces and the adjustment of policy to growth, is replaced by politics, which is the strategy of party and the lust for the spoils of office.

Every form of government tends to perish by excess of its basic principle. Aristocracy ruins itself by limiting too narrowly the circle within which power is confined; oligarchy ruins itself by the incautious scramble for immediate wealth. In either case the end is revolution. When revolution comes it may seem to arise from little causes and petty whims; but though it may spring from slight occasions it is the precipitate result of grave and accumulated wrongs; when a body is weakened by neglected ills, the merest exposure may bring serious disease. 

But even democracy ruins itself by excess—of democracy. Its basic principle is the equal right of all to hold office and determine public policy. This is at first glance a delightful arrangement; it becomes disastrous because the people are not properly equipped by education to select the best rulers and the wisest courses. 

The more Plato thinks of it, the more astounded he is at the folly of leaving to mob caprice and gullibility the selection of political officials—not to speak of leaving it to those shady and wealth-serving strategists who pull the oligarchic wires behind the democratic stage. 

To devise a method of barring incompetence and knavery from public office, and of selecting and preparing the best to rule for the common good—that is the problem of political philosophy.

4. The Psychological Problem

But behind these political problems lies the nature of man; to understand politics, we must, unfortunately, understand psychology. “Like man, like state”; “governments vary as the characters of men vary; . . . states are made out of the human natures which are in them”; the state is what it is because its citizens are what they are. 

Human behavior, says Plato, flows from three main sources: desire, emotion, and knowledge. Desire, appetite, impulse, instinct—these are one; emotion, spirit, ambition, courage—these are one; knowledge, thought, intellect, reason—these are one. 

Desire has its seat in the loins; it is a bursting reservoir of energy, fundamentally sexual. Emotion has its seat in the heart, in the flow and force of the blood; it is the organic resonance of experience and desire. Knowledge has its seat in the head; it is the eye of desire, and can become the pilot of the soul.

These powers and qualities are all in all men, but in divers degrees. 

Now just as effective individual action implies that desire, though warmed with emotion, is guided by knowledge; so in the perfect state the industrial forces would produce but they would not rule; the military forces would protect but they would not rule; the forces of knowledge and science and philosophy would be nourished and protected, and they would rule. 

Only a philosopher-king is fit to guide a nation. 

This is the key-stone of the arch of Plato’s thought.


5. The Psychological Solution

Well, then, what is to be done?

We must begin by “sending out into the country all the inhabitants of the city who are more than ten years old, and by taking possession of the children, who will thus be protected from the habits of their parents”. We cannot build Utopia with young people corrupted at every turn by the example of their elders. We must start, so far as we can, with a clean slate. 

The first turn on our road is universal education.

For the first ten years of life, education shall be predominantly physical; every school is to have a gymnasium and a playground; play and sport are to be the entire curriculum; and in this first decade such health will be stored up as will make all medicine unnecessary. 

But mere athletics and gymnastics would make a man too one-sided. 

Perhaps music will solve our problem: through music the soul learns harmony and rhythm.

Music is valuable not only because it brings refinement of feeling and character, but also because it preserves and restores health. 


Music and measure lend grace and health to the soul and to the body; but again, too much music is as dangerous as too much athletics. To be merely an athlete is to be nearly a savage; and to be merely a musician is to be “melted and softened beyond what is good”. The two must be combined; and after sixteen the individual practice of music must be abandoned, though choral singing, like communal games, will go on throughout life. 

We must have a religion.

Plato believes that a nation cannot be strong unless it believes in God.

That test will be no mere academic examination; it will be practical as well as theoretical. 

Every kind of ability will have a chance to show itself, and every sort of stupidity will be hunted out into the light. Those who fail will be assigned to the economic work of the nation; they will be business men, and clerks, and factory workers, and farmers.

Those who pass this first test will receive ten more years of education and training, in body and mind and character. 

And then they will face a second test, far severer than the first. Those who fail will become the auxiliaries, or executive aides and military officers of the state. Now it is just in these great eliminations that we shall need every resource of persuasion to get the eliminated to accept their fate with urbanity and peace.

Then religion and faith will be our only salvation: we shall tell these young people that the divisions into which they have fallen are God-decreed and irrevocable—not all their tears shall wipe out one word of it.

But now what of the lucky remnant that ride these successive waves of selection?

They are taught philosophy. First then, our young Elite must learn to think clearly. For that purpose they shall study the doctrine of Ideas.

Well, after five years of training in this recondite doctrine of Ideas, 

this art of perceiving significant forms and causal sequences and ideal potentialities amid the welter and hazard of sensation; after five years of training in the application of this principle to the behavior of men and the conduct of states; after this long preparation from childhood through youth and into the maturity of thirty-five; surely now these perfect products are ready to assume the royal purple and the highest functions of public life?—surely they are at last the philosopher-kings who are to rule and to free the human race?

Alas! not yet. Their education is still unfinished. For after all it has been, in the main, a theoretical education; something else is needed. Let these Ph.D.’s pass down now from the heights of philosophy into the “cave” of the world of men and things; generalizations and abstractions are worthless except they be tested by this concrete world; let our students enter that world with no favor shown them. 

And this last and sharpest test shall go on ruthlessly for fifteen long years. 

Some of our perfect products will break under the pressure, and be submerged by this last great wave of elimination. 

Those that survive, scarred and fifty, sobered and self-reliant, shorn of scholastic vanity by the merciless friction of life, and armed now with all the wisdom that tradition and experience, culture and conflict, can coöperate to give—these men at last shall automatically become the rulers of the state.


6. The Political Solution

Every man shall have an equal chance to make himself fit for the complex tasks of administration; but only those who have proved their mettle (or, in our myth, their metal), and have emerged from all tests with the insignia of skill, shall be eligible to rule. Public officials shall be chosen not by votes, nor by secret cliques pulling the unseen wires of democratic pretense, but by their own ability as demonstrated in the fundamental democracy of an equal race. 

But we have come to think of aristocracies as hereditary: let it be carefully noted that this Platonic aristocracy is not of that kind; one would rather call it a democratic aristocracy. 

Career will be open to talent wherever it is born. This is a democracy of the schools—a hundredfold more honest and more effective than a democracy of the polls.

They shall be legislature and executive and court in one; even the laws shall not bind them to a dogma in the face of altered circumstance; the rule of the guardians shall be a flexible intelligence unbound by precedent.

But how can men of fifty have a flexible intelligence? Plato answers that he has guarded against this difficulty by giving his philosophers the training of life as well as the erudition of the schools; that they will in consequence be men of action rather than merely men of thought—men seasoned to high purposes and noble temper by long experience and trial. By philosophy Plato means an active culture, wisdom that mixes with the concrete busyness of life; he does not mean a closeted and impractical metaphysician.

So much for incompetence; as for rascality we may provide against that by establishing among the guardians a system of communism:

In the first place none of them should have any property beyond what is absolutely necessary; neither should they have a private house, with bars and bolts, closed against any one who has a mind to enter; their provisions should be only such as are required by trained warriors, who are men of temperance and courage; their agreement is to receive from the citizens a fixed rate of pay, enough to meet the expenses of the year, and no more; and they will have common meals and live together, like soldiers in a camp.

The guardians will have no wives. Their communism is to be of women as well as of goods. They are to be freed not only from the egoism of self, but from the egoism of family; they are not to be narrowed to the anxious acquisitiveness of the prodded husband; they are to be devoted not to a woman but to the community. Even their children shall not be specifically or distinguishably theirs; all children of guardians shall be taken from their mothers at birth and brought up in common; their particular parentage will be lost in the scuffle. All the guardian-mothers will care for all the guardian-children; the brotherhood of man, within these limits, will graduate from phrase to fact; every boy will be a brother to every other boy, every girl a sister, every man a father, and every woman a mother.

But whence will these women come? Some, no doubt, the guardians will woo out of the industrial or military classes; others will have become, by their own right, members of the guardian class.

Community of wives does not mean indiscriminate mating; rather there is to be strict eugenic supervision of all reproductive relations. Therefore no man or woman shall procreate unless in perfect health; a health certificate is to be required of every bride and groom. Men may reproduce only when they are above thirty and under forty-five; women only when they are above twenty and under forty. Men unmarried by thirty-five are to be taxed into felicity. Offspring born of unlicensed matings, or deformed, are to be exposed and left to die. Before and after the ages specified for procreation, mating is to be free, on condition that the foetus be aborted.

But our eugenic society must be protected not only from disease and deterioration within, but from enemies without. It must be ready, if need be, to wage successful war. Our model community would of course be pacific, for it would restrict population within the means of subsistence; but neighboring states not so managed might well look upon the orderly prosperity of our Utopia as an invitation to raid and rapine. Hence, while deploring the necessity, we shall have, in our intermediate class, a sufficient number of well-trained soldiers, living a hard and simple life like the guardians, on a stated modicum of goods supplied by their “maintainers and fore-fathers,” the people. At the same time every precaution must be taken to avoid the occasions of war. 

The primary occasion is overpopulation (373); the second is foreign trade, with the inevitable disputes that interrupt it. Indeed, competitive trade is really a form of war; “peace is only a name” (Laws, 622). It will be well then to situate our ideal state considerably inland, so that it shall be shut out from any high development of foreign commerce.

So our political structure will be topped with a small class of guardians; it will be protected by a large class of soldiers and “auxiliaries”; and it will rest on the broad base of a commercial, industrial, and agricultural population. This last or economic class will retain private property, private mates, and private families. But trade and industry will be regulated by the guardians to prevent excessive individual wealth or poverty; anyone acquiring more than four times the average possession of the citizens must relinquish the excess to the state. 

Perhaps interest will be forbidden, and profits limited. 

That would be a just state.


7. The Ethical Solution

What is justice? There are only three things worth while in this world—justice, beauty and truth; and perhaps none of them can be defined. 

But for justice Plato ventures a definition. “Justice,” he says, “is the having and doing what is one’s own”.

Simply that each man shall receive the equivalent of what he produces, and shall perform the function for which he is best fit. A just man is a man in just the right place, doing his best, and giving the full equivalent of what he receives. A society of just men would be therefore a highly harmonious and efficient group.

And in the individual too, justice is effective coördination, the harmonious functioning of the elements in a man, each in its fit place and each making its coöperative contribution to behavior.

Justice is not mere strength, but harmonious strength—desires and men falling into that order which constitutes intelligence and organization; justice is not the right of the stronger, but the effective harmony of the whole.

Truth changes her garments frequently (like every seemly lady), but under the new habit she remains always the same.

8. Criticism

Such examples indicate that within limits and with modifications, Plato’s plan is practicable: and indeed he himself had derived it largely from actual practice as seen on his travels.

Yet critics from Aristotle’s day to ours have found in the Republic many an opening for objection and doubt.

So far Plato’s greatest (and most jealous) pupil; and most of the criticisms of later date strike the same chord. Plato underrated, we are told, the force of custom accumulated in the institution of monogamy, and in the moral code attached to that institution; he underestimated the possessive jealousy of males in supposing that a man would be content to have merely an aliquot portion of a wife; he minimized the maternal instinct in supposing that mothers would agree to have their children taken from them and brought up in a heartless anonymity. And above all he forgot that in abolishing the family he was destroying the great nurse of morals and the chief source of those coöperative and communistic habits which would have to be the psychological basis of his state; with unrivaled eloquence he sawed off the branch on which he sat.

Other objections are economic rather than psychological.

What Plato lacks above all, perhaps, is the Heracleitean sense of flux and change.

Finally, it is only fair to add that Plato understands that his Utopia does not quite fall within the practicable realm. He admits that he has described an ideal difficult of attainment; he answers that there is nevertheless a value in painting these pictures of our desire; man’s significance is that he can image a better world, and will some part of it at least into reality; man is an animal that makes Utopias.

Nevertheless, with all these concessions to doubt, the Master was bold enough to risk himself when a chance offered to realize his plan.

And yet the closing years of his long life must have been fairly happy. His pupils had gone out in every direction, and their success had made him honored everywhere. He was at peace in his Academe, walking from group to group of his students and giving them problems and tasks on which they were to make research and, when he came to them again, give report and answer.

9.Death of the Master

One of his pupils, facing that great abyss called marriage, invited the Master to his wedding feast. Plato came, rich with his eighty years, and joined the merry-makers gladly. But as the hours laughed themselves away, the old philosopher retired into a quiet corner of the house, and sat down on a chair to win a little sleep. In the morning, when the feast was over, the tired revellers came to wake him. They found that during the night, quietly and without ado, he had passed from a little sleep to an endless one. All Athens followed him to the grave.

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