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140-545: The idea is first recorded in Plato and Aristotle , especially with regard to the succession of memories. Particularly, the model is traced back to the Aristotelian notion that human memory encompasses all mental phenomena. The model was discussed in detail in the philosopher's work, Memory and Reminiscence . This view was then widely embraced until the emergence of British associationism, which began with Thomas Hobbes . Members of

280-486: A Platonist or Pythagorean, in that such a one would have "the viewpoint of logical simplicity as an indispensable and effective tool of his research." British philosopher Alfred N. Whitehead is often misquoted of uttering the famous saying of "All of Western philosophy is a footnote to Plato." Many recent philosophers have also diverged from what some would describe as ideals characteristic of traditional Platonism. Friedrich Nietzsche notoriously attacked Plato's "idea of

420-488: A belief in the immortality of the soul, and several dialogues end with long speeches imagining the afterlife . In the Timaeus , Socrates locates the parts of the soul within the human body: Reason is located in the head, spirit in the top third of the torso , and the appetite in the middle third of the torso, down to the navel . Furthermore, Plato evinces a belief in the theory of reincarnation in multiple dialogues (such as

560-511: A brief peace came about; then the war resumed to Sparta's advantage. Athens was definitively defeated in 404 BC, and internal Athenian agitations mark the end of the 5th century BC in Greece. Since its beginning, Sparta had been ruled by a diarchy . This meant that Sparta had two kings ruling concurrently throughout its entire history. The two kingships were both hereditary, vested in the Agiad dynasty and

700-633: A chief advisor to the Spartans and began to counsel them on the best way to defeat his native land. Alcibiades persuaded the Spartans to begin building a real navy for the first time—large enough to challenge the Athenian superiority at sea. Additionally, Alcibiades persuaded the Spartans to ally themselves with their traditional foes—the Persians. As noted below, Alcibiades soon found himself in controversy in Sparta when he

840-469: A declaration of war) would depend on their geographical position. The territory of the city was also divided into thirty trittyes as follows: A tribe consisted of three trittyes, selected at random, one from each of the three groups. Each tribe therefore always acted in the interest of all three sectors. It was this corpus of reforms that allowed the emergence of a wider democracy in the 460s and 450s BC. In Ionia (the modern Aegean coast of Turkey ),

980-400: A descendant of two kings, Codrus and Melanthus . His mother was Perictione , descendant of Solon , a statesman credited with laying the foundations of Athenian democracy . Plato had two brothers, Glaucon and Adeimantus , a sister, Potone , and a half brother, Antiphon. Plato may have travelled to Italy, Sicily , Egypt, and Cyrene . At 40, he founded a school of philosophy,

1120-489: A different doctrine with respect to Forms to Plato and Socrates. Aristotle suggests that Socrates' idea of forms can be discovered through investigation of the natural world, unlike Plato's Forms that exist beyond and outside the ordinary range of human understanding. The Socratic problem concerns how to reconcile these various accounts. The precise relationship between Plato and Socrates remains an area of contention among scholars. Although Socrates influenced Plato directly,

1260-483: A fellow disciple of Plato. A variety of sources have given accounts of Plato's death. One story, based on a mutilated manuscript, suggests Plato died in his bed, whilst a young Thracian girl played the flute to him. Another tradition suggests Plato died at a wedding feast. The account is based on Diogenes Laërtius's reference to an account by Hermippus, a third-century Alexandrian. According to Tertullian , Plato simply died in his sleep. According to Philodemus, Plato

1400-558: A few people were capable or interested in following a reasoned philosophical discourse, but men in general are attracted by stories and tales. Consequently, then, he used the myth to convey the conclusions of the philosophical reasoning. Notable examples include the story of Atlantis , the Myth of Er , and the Allegory of the Cave . When considering the taxonomic definition of mankind , Plato proposed

1540-460: A hegemony, they decided after 403 BC not to support the directives that he had made. Agesilaus came to power by accident at the start of the 4th century BC. This accidental accession meant that, unlike the other Spartan kings, he had the advantage of a Spartan education. The Spartans at this date discovered a conspiracy against the laws of the city conducted by Cinadon and as a result concluded there were too many dangerous worldly elements at work in

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1680-463: A major power without regaining its former glory. This empire was powerful but short-lived. In 405 BC, the Spartans were masters of all—of Athens' allies and of Athens itself—and their power was undivided. By the end of the century, they could not even defend their own city. As noted above, in 400 BC, Agesilaus became king of Sparta. The subject of how to reorganize the Athenian Empire as part of

1820-477: A number of island cities benefiting from Athens' maritime protection), and other states outside this Athenian Empire. The sources denounce this Athenian supremacy (or hegemony ) as smothering and disadvantageous. After 403 BC, things became more complicated, with a number of cities trying to create similar empires over others, all of which proved short-lived. The first of these turnarounds was managed by Athens as early as 390 BC, allowing it to re-establish itself as

1960-627: A number of victories. For most of the first years of his reign, Agesilaus had been engaged in a war against Persia in the Aegean Sea and in Asia Minor. In 394 BC, the Spartan authorities ordered Agesilaus to return to mainland Greece. While Agesilaus had a large part of the Spartan Army in Asia Minor, the Spartan forces protecting the homeland had been attacked by a coalition of forces led by Corinth. At

2100-472: A participant in any of the dialogues, and with the exception of the Apology , there is no suggestion that he heard any of the dialogues firsthand. Some dialogues have no narrator but have a pure "dramatic" form, some dialogues are narrated by Socrates himself, who speaks in the first person. The Symposium is narrated by Apollodorus, a Socratic disciple, apparently to Glaucon. Apollodorus assures his listener that he

2240-560: A pro-Spartan oligarchy headed by Isagoras . But his rival Cleisthenes , with the support of the middle class and aided by pro-democracy citizens, took over. Cleomenes intervened in 508 and 506 BC, but could not stop Cleisthenes, now supported by the Athenians. Through Cleisthenes' reforms, the people endowed their city with isonomic institutions—equal rights for all citizens (though only men were citizens)—and established ostracism . The isonomic and isegoric (equal freedom of speech) democracy

2380-509: A sceptic about the Sicilian Expedition , he was appointed along with Alcibiades to lead the expedition. However, unlike the expedition against Melos, the citizens of Athens were deeply divided over Alcibiades' proposal for an expedition to far-off Sicily. In June 415 BC, on the very eve of the departure of the Athenian fleet for Sicily, a band of vandals in Athens defaced the many statues of

2520-413: A sense that ideas or object are truly connected, instead he sees them as mental tools used for creating a useful mental representation of the world. Later members of the school developed very specific principles elaborating how associations worked and even a physiological mechanism bearing no resemblance to modern neurophysiology . For a fuller explanation of the intellectual history of associationism and

2660-723: A successful naval expedition against the Aegean islands. In 490 BC, Darius the Great , having suppressed the Ionian cities, sent a Persian fleet to punish the Greeks. (Historians are uncertain about their number of men; accounts vary from 18,000 to 100,000.) They landed in Attica intending to take Athens, but were defeated at the Battle of Marathon by a Greek army of 9,000 Athenian hoplites and 1,000 Plataeans led by

2800-419: A tripartite class structure corresponding to the appetite/spirit/reason structure of the individual soul. The appetite/spirit/reason are analogous to the castes of society. According to Socrates, a state made up of different kinds of souls will, overall, decline from an aristocracy (rule by the best) to a timocracy (rule by the honourable), then to an oligarchy (rule by the few), then to a democracy (rule by

2940-465: A war in which Thebes allied with its old enemy Athens. Then the Theban generals Epaminondas and Pelopidas won a decisive victory at Leuctra (371 BC). The result of this battle was the end of Spartan supremacy and the establishment of Theban dominance, but Athens herself recovered much of her former power because the supremacy of Thebes was short-lived. With the death of Epaminondas at Mantinea (362 BC)

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3080-493: Is a central figure in the history of Western philosophy . Plato's entire body of work is believed to have survived intact for over 2,400 years—unlike that of nearly all of his contemporaries. Although their popularity has fluctuated, they have consistently been read and studied through the ages. Through Neoplatonism , he also greatly influenced both Christian and Islamic philosophy . In modern times, Alfred North Whitehead famously said: "the safest general characterization of

3220-800: Is already implicitly known, or at exposing the contradictions and muddles of an opponent's position." Karl Popper , on the other hand, claims that dialectic is the art of intuition for "visualising the divine originals, the Forms or Ideas, of unveiling the Great Mystery behind the common man's everyday world of appearances". During the early Renaissance, the Greek language and, along with it, Plato's texts were reintroduced to Western Europe by Byzantine scholars. Some 250 known manuscripts of Plato survive. In September or October 1484 Filippo Valori and Francesco Berlinghieri printed 1025 copies of Ficino's translation, using

3360-477: Is also referenced by Jewish philosopher and Talmudic scholar Maimonides in his The Guide for the Perplexed . The works of Plato were again revived at the times of Islamic Golden ages with other Greek contents through their translation from Greek to Arabic. Neoplatonism was revived from its founding father, Plotinus. Neoplatonism, a philosophical current that permeated Islamic scholarship, accentuated one facet of

3500-502: Is by no means universally accepted, though Plato's works are still often characterized as falling at least roughly into three groups stylistically. Plato's unwritten doctrines are, according to some ancient sources, the most fundamental metaphysical teaching of Plato, which he disclosed only orally, and some say only to his most trusted fellows, and which he may have kept secret from the public, although many modern scholars doubt these claims. A reason for not revealing it to everyone

3640-664: Is known as the Peloponnesian League. However, unlike the Hellenic League and the Delian League, this league was not a response to any external threat, Persian or otherwise: it was unabashedly an instrument of Spartan policy aimed at Sparta's security and Spartan dominance over the Peloponnese peninsula. The term "Peloponnesian League" is a misnomer. It was not really a "league" at all. Nor was it really "Peloponnesian". There

3780-497: Is partially discussed in Phaedrus where Plato criticizes the written transmission of knowledge as faulty, favouring instead the spoken logos : "he who has knowledge of the just and the good and beautiful ... will not, when in earnest, write them in ink, sowing them through a pen with words, which cannot defend themselves by argument and cannot teach the truth effectually." It is, however, said that Plato once disclosed this knowledge to

3920-412: Is recounting the story, which took place when he himself was an infant, not from his own memory, but as remembered by Aristodemus, who told him the story years ago. The Theaetetus is also a peculiar case: a dialogue in dramatic form embedded within another dialogue in dramatic form. Some scholars take this as an indication that Plato had by this date wearied of the narrated form. In most of the dialogues,

4060-477: Is virtue. In the Republic , Plato poses the question, "What is justice?" and by examining both individual justice and the justice that informs societies, Plato is able not only to inform metaphysics, but also ethics and politics with the question: "What is the basis of moral and social obligation?" Plato's well-known answer rests upon the fundamental responsibility to seek wisdom, wisdom which leads to an understanding of

4200-525: The Gorgias and his ambivalence toward rhetoric expressed in the Phaedrus . But other contemporary researchers contest the idea that Plato despised rhetoric and instead view his dialogues as a dramatization of complex rhetorical principles. Plato made abundant use of mythological narratives in his own work; It is generally agreed that the main purpose for Plato in using myths was didactic. He considered that only

4340-529: The Laws features Socrates, although many dialogues, including the Timaeus and Statesman , feature him speaking only rarely. Leo Strauss notes that Socrates' reputation for irony casts doubt on whether Plato's Socrates is expressing sincere beliefs. Xenophon 's Memorabilia and Aristophanes 's The Clouds seem to present a somewhat different portrait of Socrates from the one Plato paints. Aristotle attributes

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4480-578: The Republic was prototypically totalitarian ; this has been disputed. Edmund Gettier famously demonstrated the Gettier problem for the justified true belief account of knowledge. That the modern theory of justified true belief as knowledge, which Gettier addresses, is equivalent to Plato's is, however, accepted only by some scholars but rejected by others. Primary sources (Greek and Roman) Secondary sources Classical Greece Classical Greece

4620-596: The Academy . It was located in Athens, on a plot of land in the Grove of Hecademus or Academus , named after an Attic hero in Greek mythology . The Academy operated until it was destroyed by Sulla in 84 BC. Many philosophers studied at the Academy, the most prominent being Aristotle. According to Diogenes Laërtius , throughout his later life, Plato became entangled with the politics of

4760-455: The Battle of Coronea , Agesilaus and his Spartan Army defeated a Theban force. During the war, Corinth drew support from a coalition of traditional Spartan enemies—Argos, Athens and Thebes. However, when the war descended into guerilla tactics, Sparta decided that it could not fight on two fronts and so chose to ally with Persia. The long Corinthian War finally ended with the Peace of Antalcidas or

4900-489: The Battle of Thermopylae . The Persians left Greece in 479 BC after their defeat at Plataea . Plataea was the final battle of Xerxes' invasion of Greece. After this, the Persians never again tried to invade Greece. With the disappearance of this external threat, cracks appeared in the united front of the Hellenic League. In 477, Athens became the recognised leader of a coalition of city-states that did not include Sparta. This coalition met and formalized their relationship at

5040-534: The Greek Dark Ages and Archaic period and is in turn succeeded by the Hellenistic period . This century is essentially studied from the Athenian outlook because Athens has left us more narratives, plays, and other written works than any of the other ancient Greek states . From the perspective of Athenian culture in classical Greece, the period generally referred to as the 5th century BC extends slightly into

5180-603: The King's Peace , in which the "Great King" of Persia, Artaxerxes II , pronounced a "treaty" of peace between the various city-states of Greece which broke up all "leagues" of city-states on Greek mainland and in the islands of the Aegean Sea . Although this was looked upon as "independence" for some city-states, the effect of the unilateral "treaty" was highly favourable to the interests of the Persian Empire. The Corinthian War revealed

5320-527: The Meno , Socrates uses a geometrical example to expound Plato's view that knowledge in this latter sense is acquired by recollection. Socrates elicits a fact concerning a geometrical construction from a slave boy, who could not have otherwise known the fact (due to the slave boy's lack of education). The knowledge must be of, Socrates concludes, an eternal, non-perceptible Form. Plato also discusses several aspects of epistemology . In several dialogues, Socrates inverts

5460-464: The Persian general Mardonius led a campaign through Thrace and Macedonia . He was victorious and again subjugated the former and conquered the latter, but he was wounded and forced to retreat back into Asia Minor. In addition, a fleet of around 1,200 ships that accompanied Mardonius on the expedition was wrecked by a storm off the coast of Mount Athos . Later, the generals Artaphernes and Datis led

5600-448: The Phaedo and Timaeus ). Scholars debate whether he intends the theory to be literally true, however. He uses this idea of reincarnation to introduce the concept that knowledge is a matter of recollection of things acquainted with before one is born, and not of observation or study. Keeping with the theme of admitting his own ignorance, Socrates regularly complains of his forgetfulness. In

5740-649: The Renaissance , George Gemistos Plethon brought Plato's original writings to Florence from Constantinople in the century of its fall. Many of the greatest early modern scientists and artists who broke with Scholasticism , with the support of the Plato-inspired Lorenzo (grandson of Cosimo), saw Plato's philosophy as the basis for progress in the arts and sciences. The 17th century Cambridge Platonists , sought to reconcile Plato's more problematic beliefs, such as metempsychosis and polyamory, with Christianity. By

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5880-735: The Scholastic philosophers referred to Aristotle as "the Philosopher". The only Platonic work known to western scholarship was Timaeus , until translations were made after the fall of Constantinople , which occurred during 1453. However, the study of Plato continued in the Byzantine Empire , the Caliphates during the Islamic Golden Age , and Spain during the Golden age of Jewish culture . Plato

6020-610: The justified true belief definition in the Theaetetus , concluding that justification (or an "account") would require knowledge of difference , meaning that the definition of knowledge is circular . In the Sophist , Statesman , Republic , Timaeus , and the Parmenides , Plato associates knowledge with the apprehension of unchanging Forms and their relationships to one another (which he calls "expertise" in dialectic), including through

6160-457: The metaphysical tradition that strongly influenced Plato and continues today. Heraclitus viewed all things as continuously changing , that one cannot "step into the same river twice" due to the ever-changing waters flowing through it, and all things exist as a contraposition of opposites. According to Diogenes Laërtius, Plato received these ideas through Heraclitus' disciple Cratylus . Parmenides adopted an altogether contrary vision, arguing for

6300-557: The military party, led by Alcibiades . Thus, in 415 BC, Alcibiades found support within the Athenian Assembly for his position when he urged that Athens launch a major expedition against Syracuse , a Peloponnesian ally in Sicily , Magna Graecia . Segesta, a town in Sicily, had requested Athenian assistance in their war with another Sicilian town—the town of Selinus. Although Nicias was

6440-439: The "Associationist School", see Association of Ideas . Associationism is often concerned with middle-level to higher-level mental processes such as learning . For instance, the thesis, antithesis, and synthesis are linked in one's mind through repetition so that they become inextricably associated with one another. Among the earliest experiments that tested the applications of associationism, involve Hermann Ebbinghaus' work. He

6580-435: The "twin pillars of Platonism" as the theory of Forms, on the one hand, and, on the other hand, the doctrine of immortality of the soul. In the dialogues Socrates regularly asks for the meaning of a general term (e. g. justice, truth, beauty), and criticizes those who instead give him particular examples, rather than the quality shared by all examples. "Platonism" and its theory of Forms (also known as 'theory of Ideas') denies

6720-464: The 19th century, Plato's reputation was restored, and at least on par with Aristotle's. Plato's influence has been especially strong in mathematics and the sciences. Plato's resurgence further inspired some of the greatest advances in logic since Aristotle, primarily through Gottlob Frege . Albert Einstein suggested that the scientist who takes philosophy seriously would have to avoid systematization and take on many different roles, and possibly appear as

6860-571: The 1st century AD: Axiochus , Definitions , Demodocus , Epigrams , Eryxias , Halcyon , On Justice , On Virtue , Sisyphus . No one knows the exact order Plato's dialogues were written in, nor the extent to which some might have been later revised and rewritten. The works are usually grouped into Early (sometimes by some into Transitional ), Middle , and Late period; The following represents one relatively common division amongst developmentalist scholars. Whereas those classified as "early dialogues" often conclude in aporia ,

7000-629: The 400 to overthrow democracy in Samos failed. Alcibiades was immediately made an admiral ( navarch ) in the Athenian navy. Later, due to democratic pressures, the 400 were replaced by a broader oligarchy called "the 5000". Alcibiades did not immediately return to Athens. In early 410, Alcibiades led an Athenian fleet of 18 triremes against the Persian-financed Spartan fleet at Abydos near the Hellespont . The Battle of Abydos had actually begun before

7140-570: The 6th century BC. In this context, one might consider that the first significant event of this century occurs in 508 BC, with the fall of the last Athenian tyrant and Cleisthenes ' reforms. However, a broader view of the whole Greek world might place its beginning at the Ionian Revolt of 500 BC, the event that provoked the Persian invasion of 492 BC. The Persians were defeated in 490 BC. A second Persian attempt , in 481–479 BC, failed as well, despite having overrun much of modern-day Greece (north of

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7280-594: The Aegean Sea, defeating their fleet decisively in the Battle of Mycale ; then in 478 BC the fleet captured Byzantium . At that time Athens enrolled all the island states and some mainland ones into an alliance called the Delian League , so named because its treasury was kept on the sacred island of Delos . The Spartans, although they had taken part in the war, withdrew into isolation afterwards, allowing Athens to establish unchallenged naval and commercial power. In 431 BC war broke out between Athens and Sparta . The war

7420-594: The Associationist School, including John Locke , David Hume , David Hartley , Joseph Priestley , James Mill , John Stuart Mill , Alexander Bain , and Ivan Pavlov , asserted that the principle applied to all or most mental processes. The phrase association of ideas was first used by John Locke in 1689 in Chapter 33 of An Essay Concerning Human Understanding entitled “Of the Association of Ideas″, he describes

7560-460: The Athenian general Miltiades . The Persian fleet continued to Athens but, seeing it garrisoned, decided not to attempt an assault. In 480 BC, Darius' successor Xerxes I sent a much more powerful force of 300,000 by land, with 1,207 ships in support, across a double pontoon bridge over the Hellespont . This army took Thrace, before descending on Thessaly and Boeotia, whilst the Persian navy skirted

7700-463: The Athenian-controlled island of Samos . Alcibiades felt that "radical democracy" was his worst enemy. Accordingly, he asked his supporters to initiate a coup to establish an oligarchy in Athens. If the coup were successful Alcibiades promised to return to Athens. In 411, a successful oligarchic coup was mounted in Athens, by a group which became known as "the 400". However, a parallel attempt by

7840-537: The Battle of Haliartus the Spartans had been defeated by the Theban forces. Worse yet, Lysander, Sparta's chief military leader, had been killed during the battle. This was the start of what became known as the " Corinthian War " (395–387 BC). Upon hearing of the Spartan loss at Haliartus and of the death of Lysander, Agesilaus headed out of Asia Minor, back across the Hellespont, across Thrace and back towards Greece. At

7980-769: The European philosophical tradition is that it consists of a series of footnotes to Plato." There is a traditional story that Plato ( Ancient Greek : Πλάτων , Plátōn , from Ancient Greek : πλατύς , romanized :  platys , lit.   'broad') is a nickname . According to Diogenes Laërtius, writing hundreds of years after Plato's death, his birth name was Aristocles ( Ἀριστοκλῆς ), meaning 'best reputation'. "Platon" sounds like "Platus" or "Platos", meaning "broad", and according to Diogenes' sources, Plato gained his nickname either from his wrestling coach, Ariston of Argos, who dubbed him "broad" on account of his chest and shoulders, or he gained it from

8120-517: The Eurypontid dynasty. According to legend, the respective hereditary lines of these two dynasties sprang from Eurysthenes and Procles , twin descendants of Hercules . They were said to have conquered Sparta two generations after the Trojan War . In 510 BC, Spartan troops helped the Athenians overthrow their king, the tyrant Hippias , son of Peisistratos . Cleomenes I , king of Sparta, put in place

8260-566: The Eurypontid king as Agesilaus II , expelled Leotychidas from the country, and took over all of Agis' estates and property. The end of the Peloponnesian War left Sparta the master of Greece, but the narrow outlook of the Spartan warrior elite did not suit them to this role. Within a few years the democratic party regained power in Athens and in other cities. In 395 BC the Spartan rulers removed Lysander from office, and Sparta lost her naval supremacy. Athens , Argos , Thebes , and Corinth,

8400-742: The Form of the Good. Plato views "The Good" as the supreme Form, somehow existing even "beyond being". In this manner, justice is obtained when knowledge of how to fulfill one's moral and political function in society is put into practice. The dialogues also discuss politics. Some of Plato's most famous doctrines are contained in the Republic as well as in the Laws and the Statesman . Because these opinions are not spoken directly by Plato and vary between dialogues, they cannot be straightforwardly assumed as representing Plato's own views. Socrates asserts that societies have

8540-505: The Forms are the causes of everything else, he [i.e. Plato] supposed that their elements are the elements of all things. Accordingly, the material principle is the Great and Small [i.e. the Dyad], and the essence is the One ( τὸ ἕν ), since the numbers are derived from the Great and Small by participation in the One". "From this account it is clear that he only employed two causes: that of the essence, and

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8680-607: The Forms were the truths of geometry , such as the Pythagorean theorem . The theory of Forms is first introduced in the Phaedo dialogue (also known as On the Soul ), wherein Socrates disputes the pluralism of Anaxagoras , then the most popular response to Heraclitus and Parmenides. For Plato, as was characteristic of ancient Greek philosophy, the soul was that which gave life. Plato advocates

8820-508: The Greek cities, which included great centres such as Miletus and Halicarnassus , were unable to maintain their independence and came under the rule of the Persian Empire in the mid-6th century BC. In 499 BC that region's Greeks rose in the Ionian Revolt , and Athens and some other Greek cities sent aid, but were quickly forced to back down after defeat in 494 BC at the Battle of Lade . Asia Minor returned to Persian control. In 492 BC,

8960-473: The Greek city-states against the danger of another Persian invasion. The coalition that emerged from the first congress was named the "Hellenic League" and included Sparta. Persia, under Xerxes, invaded Greece in September 481 BC, but the Athenian navy defeated the Persian navy. The Persian land forces were delayed in 480 BC by a much smaller force of 300 Spartans, 400 Thebans and 700 men from Boeotian Thespiae at

9100-537: The Islamic context, Neoplatonism facilitated the integration of Platonic philosophy with mystical Islamic thought, fostering a synthesis of ancient philosophical wisdom and religious insight. Inspired by Plato's Republic, Al-Farabi extended his inquiry beyond mere political theory, proposing an ideal city governed by philosopher-kings . Many of these commentaries on Plato were translated from Arabic into Latin and as such influenced Medieval scholastic philosophers. During

9240-555: The Isthmus of Corinth ) at a crucial point during the war following the Battle of Thermopylae and the Battle of Artemisium . The Delian League then formed, under Athenian hegemony and as Athens' instrument. Athens' successes caused several revolts among the allied cities, all of which were put down by force, but Athenian dynamism finally awoke Sparta and brought about the Peloponnesian War in 431 BC. After both forces were spent,

9380-400: The Laurion (a small mountain range near Athens), and the hundreds of talents mined there were used to build 200 warships to combat Aeginetan piracy. A year later, the Greeks, under the Spartan Pausanias , defeated the Persian army at Plataea . The Persians then began to withdraw from Greece, and never attempted an invasion again. The Athenian fleet then turned to chasing the Persians from

9520-618: The Megarian people. The Peloponnesian League accused Athens of violating the Thirty Years Peace through all of the aforementioned actions, and, accordingly, Sparta formally declared war on Athens. Many historians consider these to be merely the immediate causes of the war. They would argue that the underlying cause was the growing resentment on the part of Sparta and its allies at the dominance of Athens over Greek affairs. The war lasted 27 years, partly because Athens (a naval power) and Sparta (a land-based military power) found it difficult to come to grips with each other. Sparta's initial strategy

9660-428: The Peloponnese Peninsula. In the 7th century BC Argos dominated the peninsula. Even in the early 6th century the Argives attempted to control the northeastern part of the peninsula. The rise of Sparta in the 6th century brought Sparta into conflict with Argos. However, with the conquest of the Peloponnesian city-state of Tegea in 550 BC and the defeat of the Argives in 546 BC the Spartans' control began to reach well beyond

9800-400: The Peloponnesian War vary from account to account. However three causes are fairly consistent among the ancient historians, namely Thucydides and Plutarch . Prior to the war, Corinth and one of its colonies, Corcyra (modern-day Corfu ), went to war in 435 BC over the new Corcyran colony of Epidamnus . Sparta refused to become involved in the conflict and urged an arbitrated settlement of

9940-521: The Persians to dominate the Greek peninsula. Among the war party in Athens, a belief arose that the catastrophic defeat of the military expedition to Sicily in 415–413 could have been avoided if Alcibiades had been allowed to lead the expedition. Thus, despite his treacherous flight to Sparta and his collaboration with Sparta and later with the Persian court, there arose a demand among the war party that Alcibiades be allowed to return to Athens without being arrested. Alcibiades negotiated with his supporters on

10080-451: The Qur’anic conception of God—the transcendent—while seemingly neglecting another—the creative. This philosophical tradition, introduced by Al-Farabi and subsequently elaborated upon by figures such as Avicenna , postulated that all phenomena emanated from the divine source. It functioned as a conduit, bridging the transcendental nature of the divine with the tangible reality of creation. In

10220-556: The Spartan Empire provoked much heated debate among Sparta's full citizens. The admiral Lysander felt that the Spartans should rebuild the Athenian empire in such a way that Sparta profited from it. Lysander tended to be too proud to take advice from others. Prior to this, Spartan law forbade the use of all precious metals by private citizens, with transactions being carried out with cumbersome iron ingots (which generally discouraged their accumulation) and all precious metals obtained by

10360-449: The Spartan navy was after the Battle of Abydos, the Persian navy directly assisted the Spartans. Alcibiades then pursued and met the combined Spartan and Persian fleets at the Battle of Cyzicus later in the spring of 410, achieving a significant victory. With the financial help of the Persians, Sparta built a fleet to challenge Athenian naval supremacy. With the new fleet and new military leader Lysander , Sparta attacked Abydos , seizing

10500-478: The Spartan state. Agesilaus employed a political dynamic that played on a feeling of pan-Hellenic sentiment and launched a successful campaign against the Persian empire. Once again, the Persian empire played both sides against each other. The Persian Court supported Sparta in the rebuilding of their navy while simultaneously funding the Athenians, who used Persian subsidies to rebuild their long walls (destroyed in 404 BC) as well as to reconstruct their fleet and win

10640-399: The action of the vandals would have weakened Alcibiades and the war party in Athens. Furthermore, it is unlikely that Alcibiades would have deliberately defaced the statues of Hermes on the very eve of his departure with the fleet. Such defacement could only have been interpreted as a bad omen for the expedition that he had long advocated. Even before the fleet reached Sicily, word arrived to

10780-474: The arrival of Alcibiades, and had been inclining slightly toward the Athenians. However, with the arrival of Alcibiades, the Athenian victory over the Spartans became a rout. Only the approach of nightfall and the movement of Persian troops to the coast where the Spartans had beached their ships saved the Spartan navy from total destruction. Following Alcibiades' advice, the Persian Empire had been playing Sparta and Athens off against each other. However, as weak as

10920-465: The borders of Laconia . As the two coalitions grew, their separate interests kept coming into conflict. Under the influence of King Archidamus II (the Eurypontid king of Sparta from 476 BC through 427 BC), Sparta, in the late summer or early autumn of 446 BC, concluded the Thirty Years Peace with Athens. This treaty took effect the next winter in 445 BC Under the terms of this treaty, Greece

11060-547: The breadth of his eloquence, or his wide forehead. Philodemus , in extracts from the Herculaneum papyri , corroborates the claim that Plato was named for his "broad forehead". Seneca the Younger , writing hundreds of years after Plato's death, writes "His very name was given him because of his broad chest." According to the traditional story, Plato was originally named after his paternal grandfather, supposedly called Aristocles;

11200-468: The capture of Euboea , bringing most of mainland Greece north of the Isthmus of Corinth under Persian control. However, the Athenians had evacuated the city of Athens by sea before Thermopylae, and under the command of Themistocles , they defeated the Persian fleet at the Battle of Salamis . In 483 BC, during the period of peace between the two Persian invasions, a vein of silver ore had been discovered in

11340-480: The causation of good and of evil". The most important aspect of this interpretation of Plato's metaphysics is the continuity between his teaching and the Neoplatonic interpretation of Plotinus or Ficino which has been considered erroneous by many but may in fact have been directly influenced by oral transmission of Plato's doctrine. A modern scholar who recognized the importance of the unwritten doctrine of Plato

11480-491: The character of a writer were attributed to that writer even when the actual author was unknown. The works taken as genuine in antiquity but are now doubted by at least some modern scholars are: Alcibiades I (*), Alcibiades II (‡), Clitophon (*), Epinomis (‡), Letters (*), Hipparchus (‡), Menexenus (*), Minos (‡), Lovers (‡), Theages (‡) The following works were transmitted under Plato's name in antiquity, but were already considered spurious by

11620-399: The city becoming state property. Without the Spartans' support, Lysander's innovations came into effect and brought a great deal of profit for him—on Samos, for example, festivals known as Lysandreia were organized in his honour. He was recalled to Sparta, and once there did not attend to any important matters. Sparta refused to see Lysander or his successors dominate. Not wanting to establish

11760-553: The city lost its greatest leader and his successors blundered into an ineffectual ten-year war with Phocis . In 346 BC the Thebans appealed to Philip II of Macedon to help them against the Phocians, thus drawing Macedon into Greek affairs for the first time. The Peloponnesian War was a radical turning point for the Greek world. Before 403 BC, the situation was more defined, with Athens and its allies (a zone of domination and stability, with

11900-420: The city of Syracuse , where he attempted to replace the tyrant Dionysius , with Dionysius's brother-in-law, Dion of Syracuse , whom Plato had recruited as one of his followers, but the tyrant himself turned against Plato. Plato almost faced death, but was sold into slavery. Anniceris , a Cyrenaic philosopher, bought Plato's freedom for twenty minas , and sent him home. Philodemus however states that Plato

12040-458: The coast and resupplied the ground troops. The Greek fleet, meanwhile, dashed to block Cape Artemision . After being delayed by Leonidas I , the Spartan king of the Agiad Dynasty, at the Battle of Thermopylae (a battle made famous by the 300 Spartans who faced the entire Persian army), Xerxes advanced into Attica, and captured and burned Athens. The subsequent Battle of Artemisium resulted in

12180-504: The common enemy of the Persian Empire, which was conquered within 13 years during the wars of Alexander the Great , Philip's son. In the context of the art, architecture, and culture of Ancient Greece , the Classical period corresponds to most of the 5th and 4th centuries BC (the most common dates being the fall of the last Athenian tyrant in 510 BC to the death of Alexander the Great in 323 BC). The Classical period in this sense follows

12320-484: The common man's intuition about what is knowable and what is real. Reality is unavailable to those who use their senses. Socrates says that he who sees with his eyes is blind. While most people take the objects of their senses to be real if anything is, Socrates is contemptuous of people who think that something has to be graspable in the hands to be real. In the Theaetetus , he says such people are eu amousoi (εὖ ἄμουσοι), an expression that means literally, "happily without

12460-542: The complete written philosophical work of Plato, based on the first century AD arrangement of Thrasyllus of Mendes . The modern standard complete English edition is the 1997 Hackett Plato: Complete Works , edited by John M. Cooper. Thirty-five dialogues and thirteen letters (the Epistles ) have traditionally been ascribed to Plato, though modern scholarship doubts the authenticity of at least some of these. Jowett mentions in his Appendix to Menexenus, that works which bore

12600-410: The concept of form as distinct from matter, and that the physical world is an imitation of an eternal mathematical world. These ideas were very influential on Heraclitus, Parmenides and Plato. The two philosophers Heraclitus and Parmenides , influenced by earlier pre-Socratic Greek philosophers such as Pythagoras and Xenophanes , departed from mythological explanations for the universe and began

12740-405: The death of Agis II, Leotychidas attempted to claim the Eurypontid throne for himself, but this was met with an outcry, led by Lysander, who was at the height of his influence in Sparta. Lysander argued that Leotychidas was a bastard and could not inherit the Eurypontid throne; instead he backed the hereditary claim of Agesilaus, son of Agis by another wife. With Lysander's support, Agesilaus became

12880-545: The democracy and appointed in its place an oligarchy called the " Thirty Tyrants " to govern Athens. Meanwhile, in Sparta, Timaea gave birth to a child. The child was given the name Leotychidas, after the great grandfather of Agis II—King Leotychidas of Sparta. However, because of Timaea's alleged affair with Alcibiades, it was widely rumoured that the young Leotychidas was fathered by Alcibiades. Indeed, Agis II refused to acknowledge Leotychidas as his son until he relented, in front of witnesses, on his deathbed in 400 BC. Upon

13020-487: The doctrines that would later become known as Platonism . Plato's most famous contribution is the theory of forms (or ideas) , which has been interpreted as advancing a solution to what is now known as the problem of universals . He was decisively influenced by the pre-Socratic thinkers Pythagoras , Heraclitus , and Parmenides , although much of what is known about them is derived from Plato himself. Along with his teacher Socrates , and Aristotle , his student, Plato

13160-418: The early defining mathematics, science, artistic thought ( architecture , sculpture), theatre , literature , philosophy , and politics of Western civilization derives from this period of Greek history , which had a powerful influence on the later Roman Empire . Part of the broader era of classical antiquity , the classical Greek era ended after Philip II 's unification of most of the Greek world against

13300-536: The economic growth of the Athenian Empire . Concentration on the Athenian Empire, however, brought Athens into conflict with another Greek state. Ever since the formation of the Delian League in 477 BC, the island of Melos had refused to join. By refusing to join the League, however, Melos reaped the benefits of the League without bearing any of the burdens. In 425 BC, an Athenian army under Cleon attacked Melos to force

13440-453: The famous Euthyphro dilemma in the dialogue of the same name: "Is the pious ( τὸ ὅσιον ) loved by the gods because it is pious, or is it pious because it is loved by the gods?" ( 10a ) In the Protagoras dialogue it is argued through Socrates that virtue is innate and cannot be learned, that no one does bad on purpose, and to know what is good results in doing what is good; that knowledge

13580-441: The fleet that Alcibiades was to be arrested and charged with sacrilege of the statues of Hermes, prompting Alcibiades to flee to Sparta. When the fleet later landed in Sicily and the battle was joined, the expedition was a complete disaster. The entire expeditionary force was lost and Nicias was captured and executed. This was one of the most crushing defeats in the history of Athens. Meanwhile, Alcibiades betrayed Athens and became

13720-423: The god Hermes that were scattered throughout the city of Athens. This action was blamed on Alcibiades and was seen as a bad omen for the coming campaign. In all likelihood, the coordinated action against the statues of Hermes was the action of the peace party. Having lost the debate on the issue, the peace party was desperate to weaken Alcibiades' hold on the people of Athens. Successfully blaming Alcibiades for

13860-533: The good itself" along with many fundamentals of Christian morality, which he interpreted as "Platonism for the masses" in Beyond Good and Evil (1886). Martin Heidegger argued against Plato's alleged obfuscation of Being in his incomplete tome, Being and Time (1927). Karl Popper argued in the first volume of The Open Society and Its Enemies (1945) that Plato's proposal for a " utopian " political regime in

14000-435: The holy city of Delos. Thus, the League took the name "Delian League". Its formal purpose was to liberate Greek cities still under Persian control. However, it became increasingly apparent that the Delian League was really a front for Athenian hegemony throughout the Aegean. A competing coalition of Greek city-states centred around Sparta arose, and became more important as the external Persian threat subsided. This coalition

14140-768: The idea of a changeless, eternal universe and the view that change is an illusion. Plato's most self-critical dialogue is the Parmenides , which features Parmenides and his student Zeno , which criticizes Plato's own metaphysical theories. Plato's Sophist dialogue includes an Eleatic stranger. These ideas about change and permanence, or becoming and Being, influenced Plato in formulating his theory of Forms. In Plato's dialogues, Socrates and his company of disputants had something to say on many subjects, including several aspects of metaphysics . These include religion and science, human nature, love, and sexuality. More than one dialogue contrasts perception and reality , nature and custom, and body and soul. Francis Cornford identified

14280-535: The influence of Pythagoras , or in a broader sense, the Pythagoreans, such as Archytas also appears to have been significant. Aristotle and Cicero both claimed that the philosophy of Plato closely followed the teachings of the Pythagoreans . According to R. M. Hare , this influence consists of three points: Pythagoras held that all things are number, and the cosmos comes from numerical principles. He introduced

14420-430: The island to join the Delian League. However, Melos fought off the attack and was able to maintain its neutrality. Further conflict was inevitable and in the spring of 416 BC the mood of the people in Athens was inclined toward military adventure. The island of Melos provided an outlet for this energy and frustration for the military party. Furthermore, there appeared to be no real opposition to this military expedition from

14560-455: The issue of joining the Delian League is presented by Thucydides in his Melian Dialogue . The debate did not in the end resolve any of the differences between Melos and Athens and Melos was invaded in 416 BC, and soon occupied by Athens. This success on the part of Athens whetted the appetite of the people of Athens for further expansion of the Athenian Empire. Accordingly, the people of Athens were ready for military action and tended to support

14700-524: The latter two former Spartan allies, challenged Sparta's dominance in the Corinthian War , which ended inconclusively in 387 BC. That same year Sparta shocked the Greeks by concluding the Treaty of Antalcidas with Persia. The agreement turned over the Greek cities of Ionia and Cyprus, reversing a hundred years of Greek victories against Persia. Sparta then tried to further weaken the power of Thebes, which led to

14840-546: The material cause; for the Forms are the cause of the essence in everything else, and the One is the cause of it in the Forms. He also tells us what the material substrate is of which the Forms are predicated in the case of sensible things, and the One in that of the Forms ;– that it is this the duality (the Dyad, ἡ δυάς ), the Great and Small ( τὸ μέγα καὶ τὸ μικρόν ). Further, he assigned to these two elements respectively

14980-494: The mind uses these principles, rather than reason, to traverse from idea to idea. He writes “When the mind, therefore, passes from the idea or impression of one object to the idea or belief of another, it is not determined by reason, but by certain principles, which associate together the ideas of these objects, and unite them in the imagination.” These connections are formed in the mind by observation and experience. Hume does not believe that any of these associations are “necessary’ in

15120-470: The moderate Athenian leader Nicias concluded the Peace of Nicias (421). In 418 BC, however, conflict between Sparta and the Athenian ally Argos led to a resumption of hostilities. Alcibiades was one of the most influential voices in persuading the Athenians to ally with Argos against the Spartans. At the Mantinea Sparta defeated the combined armies of Athens and her allies. Accordingly, Argos and

15260-405: The muses". In other words, such people are willingly ignorant, living without divine inspiration and access to higher insights about reality. Many have interpreted Plato as stating – even having been the first to write – that knowledge is justified true belief , an influential view that informed future developments in epistemology. Plato also identified problems with

15400-482: The name "Plato" was only used as a nickname; and the philosopher could not have been named "Plato" because that name does not occur previously in his family line. Modern scholarship tends to reject the "Aristocles" story. Plato always called himself Platon . Platon was a fairly common name (31 instances are known from Athens alone), including people named before Plato was born. Robin Waterfield states that Plato

15540-660: The other hand, if one derives one's account of something by way of the non-sensible Forms, because these Forms are unchanging, so too is the account derived from them. That apprehension of Forms is required for knowledge may be taken to cohere with Plato's theory in the Theaetetus and Meno . Indeed, the apprehension of Forms may be at the base of the account required for justification, in that it offers foundational knowledge which itself needs no account, thereby avoiding an infinite regression . Several dialogues discuss ethics including virtue and vice, pleasure and pain, crime and punishment, and justice and medicine. Socrates presents

15680-519: The other king was from the Agiad Dynasty. With the signing of the Thirty Years Peace treaty, Archidamus II felt he had successfully prevented Sparta from entering into a war with its neighbours. However, the strong war party in Sparta soon won out and in 431 BC Archidamus was forced to go to war with the Delian League. However, in 427 BC, Archidamus II died and his son, Agis II succeeded to the Eurypontid throne of Sparta. The immediate causes of

15820-518: The peace party. Enforcement of the economic obligations of the Delian League upon rebellious city-states and islands was a means by which continuing trade and prosperity of Athens could be assured. Melos alone among all the Cycladic Islands located in the south-west Aegean Sea had resisted joining the Delian League. This continued rebellion provided a bad example to the rest of the members of the Delian League. The debate between Athens and Melos over

15960-547: The people), and finally to tyranny (rule by one person, rule by a tyrant). Several dialogues tackle questions about art, including rhetoric and rhapsody. Socrates says that poetry is inspired by the muses , and is not rational. He speaks approvingly of this, and other forms of divine madness (drunkenness, eroticism, and dreaming) in the Phaedrus , and yet in the Republic wants to outlaw Homer's great poetry, and laughter as well. Scholars often view Plato's philosophy as at odds with rhetoric due to his criticisms of rhetoric in

16100-465: The primary speaker is Socrates, who employs a method of questioning which proceeds by a dialogue form called dialectic. The role of dialectic in Plato's thought is contested but there are two main interpretations: a type of reasoning and a method of intuition. Simon Blackburn adopts the first, saying that Plato's dialectic is "the process of eliciting the truth by means of questions aimed at opening out what

16240-577: The printing press  [ it ] at the Dominican convent of San Jacopo di Ripoli  [ it ] . The 1578 edition of Plato's complete works published by Henricus Stephanus ( Henri Estienne ) in Geneva also included parallel Latin translation and running commentary by Joannes Serranus ( Jean de Serres ). It was this edition which established standard Stephanus pagination , still in use today. The text of Plato as received today apparently represents

16380-420: The processes of collection and division . More explicitly, Plato himself argues in the Timaeus that knowledge is always proportionate to the realm from which it is gained. In other words, if one derives one's account of something experientially, because the world of sense is in flux, the views therein attained will be mere opinions. Meanwhile, opinions are characterized by a lack of necessity and stability. On

16520-425: The psychologists that subscribed to the idea became known as the associationists. Locke's view that the mind and body are two aspects of the same unified phenomenon can be traced back to Aristotle's ideas on the subject. In his 1740 book Treatise on Human Nature David Hume outlines three principles for ideas to be connected to each other: resemblance, continuity in time or place, and cause or effect. He argues that

16660-609: The public in his lecture On the Good ( Περὶ τἀγαθοῦ ), in which the Good ( τὸ ἀγαθόν ) is identified with the One (the Unity, τὸ ἕν ), the fundamental ontological principle. The first witness who mentions its existence is Aristotle, who in his Physics writes: "It is true, indeed, that the account he gives there [i.e. in Timaeus ] of the participant is different from what he says in his so-called unwritten teachings ( Ancient Greek : ἄγραφα δόγματα , romanized :  agrapha dogmata )." In Metaphysics he writes: "Now since

16800-695: The reality of the material world, considering it only an image or copy of the real world. According to this theory of Forms, there are these two kinds of things: the apparent world of material objects grasped by the senses, which constantly changes, and an unchanging and unseen world of Forms, grasped by reason ( λογική ). Plato's Forms represent types of things, as well as properties , patterns, and relations , which are referred to as objects. Just as individual tables, chairs, and cars refer to objects in this world, 'tableness', 'chairness', and 'carness', as well as e.g. justice , truth , and beauty refer to objects in another world. One of Plato's most cited examples for

16940-479: The rest of the Peloponnesus was brought back under the control of Sparta. The return of peace allowed Athens to be diverted from meddling in the affairs of the Peloponnesus and to concentrate on building up the empire and putting their finances in order. Soon trade recovered and tribute began, once again, rolling into Athens. A strong "peace party" arose, which promoted avoidance of war and continued concentration on

17080-456: The so-called "middle dialogues" provide more clearly stated positive teachings that are often ascribed to Plato such as the theory of Forms. The remaining dialogues are classified as "late" and are generally agreed to be difficult and challenging pieces of philosophy. It should, however, be kept in mind that many of the positions in the ordering are still highly disputed, and also that the very notion that Plato's dialogues can or should be "ordered"

17220-514: The strategic initiative. By occupying the Hellespont , the source of Athens' grain imports, Sparta effectively threatened Athens with starvation. In response, Athens sent its last remaining fleet to confront Lysander, but were decisively defeated at Aegospotami (405 BC). The loss of her fleet threatened Athens with bankruptcy. In 404 BC Athens sued for peace, and Sparta dictated a predictably stern settlement: Athens lost her city walls, her fleet, and all of her overseas possessions. Lysander abolished

17360-492: The struggle. In 433 BC, Corcyra sought Athenian assistance in the war. Corinth was known to be a traditional enemy of Athens. However, to further encourage Athens to enter the conflict, Corcyra pointed out how useful a friendly relationship with Corcyra would be, given the strategic locations of Corcyra itself and the colony of Epidamnus on the east shore of the Adriatic Sea. Furthermore, Corcyra promised that Athens would have

17500-488: The term "featherless biped", and later ζῷον πολιτικόν ( zōon politikon ), a "political" or "state-building" animal ( Aristotle 's term, based on Plato's Statesman ). Diogenes the Cynic took issue with the former definition, reportedly producing a recently plucked chicken with the exclamation of "Here is Plato’s man!" (variously translated as "Behold, a man!"; "Here is a human!" etc.). Plato never presents himself as

17640-447: The use of Corcyra's navy, the third-largest in Greece. This was too good of an offer for Athens to refuse. Accordingly, Athens signed a defensive alliance with Corcyra. The next year, in 432 BC, Corinth and Athens argued over control of Potidaea (near modern-day Nea Potidaia ), eventually leading to an Athenian siege of Potidaea. In 434–433 BC Athens issued the " Megarian Decrees ", a series of decrees that placed economic sanctions on

17780-533: The ways that ideas can be connected to each other. He writes “Some of our ideas have a natural correspondence and connection with one another”. Although he believed that some associations were natural and justified, he believed that others were illogical, causing errors in judgment. He also explains that one can associate some ideas together based on their education and culture, saying, “there is another connection of ideas wholly owing to chance or custom”. The term associationism later became more prominent in psychology and

17920-486: Was Heinrich Gomperz who described it in his speech during the 7th International Congress of Philosophy in 1930. All the sources related to the ἄγραφα δόγματα have been collected by Konrad Gaiser and published as Testimonia Platonica . Plato's thought is often compared with that of his most famous student, Aristotle , whose reputation during the Western Middle Ages so completely eclipsed that of Plato that

18060-596: Was a period of around 200 years (the 5th and 4th centuries BC) in Ancient Greece , marked by much of the eastern Aegean and northern regions of Greek culture (such as Ionia and Macedonia ) gaining increased autonomy from the Persian Empire ; the peak flourishing of democratic Athens ; the First and Second Peloponnesian Wars ; the Spartan and then Theban hegemonies ; and the expansion of Macedonia under Philip II . Much of

18200-435: Was a struggle not merely between two city-states but rather between two coalitions, or leagues of city-states: the Delian League , led by Athens, and the Peloponnesian League, led by Sparta. The Delian League grew out of the need to present a unified front of all Greek city-states against Persian aggression. In 481 BC, Greek city-states, including Sparta, met in the first of a series of "congresses" that strove to unify all

18340-498: Was accused of having seduced Timaea, the wife of Agis II, the Eurypontid king of Sparta. Accordingly, Alcibiades was required to flee from Sparta and seek the protection of the Persian Court. In the Persian court, Alcibiades now betrayed both Athens and Sparta. He encouraged Persia to give Sparta financial aid to build a navy, advising that long and continuous warfare between Sparta and Athens would weaken both city-states and allow

18480-563: Was an ancient Greek philosopher of the Classical period who is considered a foundational thinker in Western philosophy and an innovator of the written dialogue and dialectic forms. He raised problems for what became all the major areas of both theoretical philosophy and practical philosophy , and was the founder of the Platonic Academy , a philosophical school in Athens where Plato taught

18620-510: Was buried in the garden of his academy in Athens, close to the sacred shrine of the Muses. In 2024, a scroll found at Herculaneum was deciphered, that confirmed some previous theories. The papyrus says that before death Plato "retained enough lucidity to critique the musician for her lack of rhythm", and that he was buried "in his designated garden in the Academy of Athens". Plato never speaks in his own voice in his dialogues ; every dialogue except

18760-624: Was considered the first experimenter to apply the associationist principles systematically, and used himself as subject to study and quantify the relationship between rehearsal and recollection of material. Some of the ideas of the Associationist School also anticipated the principles of conditioning and its use in behavioral psychology . Both classical conditioning and operant conditioning use positive and negative associations as means of conditioning. Plato Plato ( / ˈ p l eɪ t oʊ / PLAY -toe ; Greek : Πλάτων, Plátōn , born c.  428-423 BC, died 348 BC),

18900-435: Was first organized into about 130 demes , which became the basic civic element. The 10,000 citizens exercised their power as members of the assembly ( ἐκκλησία , ekklesia ), headed by a council of 500 citizens chosen at random. The city's administrative geography was reworked, in order to create mixed political groups: not federated by local interests linked to the sea, to the city, or to farming, whose decisions (e.g.

19040-486: Was formally divided into two large power zones. Sparta and Athens agreed to stay within their own power zone and not to interfere in the other's. Despite the Thirty Years Peace, it was clear that war was inevitable. As noted above, at all times during its history down to 221 BC, Sparta was a "diarchy" with two kings ruling the city-state concurrently. One line of hereditary kings was from the Eurypontid Dynasty while

19180-481: Was no equality at all between the members, as might be implied by the term "league". Furthermore, most of its members were located outside the Peloponnese Peninsula. The terms "Spartan League" and "Peloponnesian League" are modern terms. Contemporaries instead referred to " Lacedaemonians and their Allies" to describe the "league". The league had its origins in Sparta's conflict with Argos , another city on

19320-478: Was not a nickname, but a perfectly normal name, and "the common practice of naming a son after his grandfather was reserved for the eldest son", not Plato. According to Debra Nails, Plato's grandfather was the Aristocles who was archon in 605/4. Plato was born in Athens or Aegina , between 428 and 423 BC. He was a member of an aristocratic and influential family. His father was Ariston, who may have been

19460-553: Was sold as a slave as early as in 404 BC, when the Spartans conquered Aegina, or, alternatively, in 399 BC, immediately after the death of Socrates. After Dionysius's death, according to Plato's Seventh Letter , Dion requested Plato return to Syracuse to tutor Dionysius II , who seemed to accept Plato's teachings, but eventually became suspicious of their motives, expelling Dion and holding Plato against his will. Eventually Plato left Syracuse and Dion would return to overthrow Dionysius and rule Syracuse, before being usurped by Callippus ,

19600-429: Was to invade Attica , but the Athenians were able to retreat behind their walls. An outbreak of plague in the city during the siege caused many deaths, including that of Pericles . At the same time the Athenian fleet landed troops in the Peloponnesus, winning battles at Naupactus (429) and Pylos (425). However, these tactics could bring neither side a decisive victory. After several years of inconclusive campaigning,

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