History › Classical age › The Axial Age: new philosophies and faiths
Greek philosophy: Socrates, Plato, Aristotle
Socrates 470–399 BC; Plato c. 428–348; Aristotle 384–322· Idea, religion or movement· Europe
Well documentedSolid records, physical evidence or scientific consensus.
Three thinkers based in Athens (Socrates, his student Plato and Plato's student Aristotle) laid foundations of Western philosophy, logic and science.
See it on the History map →What happened
Socrates wrote nothing; he questioned Athenians in the marketplace about justice and virtue, a method of probing questions still used in law schools. Plato recorded him in dialogues, founded the Academy, and argued that true reality lies in perfect 'Forms' behind appearances. Aristotle, a student there for 20 years, then founded the Lyceum and catalogued everything from logic, ethics and politics to animals and physics. Earlier Greeks such as Thales had already sought natural, not mythical, explanations.
Why it matters
Their questions and methods, preserved by Byzantine and Islamic scholars and revived in medieval and Renaissance Europe, framed Western thinking on ethics, government and science for 2,000 years.
Think of it like
Socrates cross-examined like a trial lawyer; Plato drew blueprints of ideal worlds; Aristotle surveyed and catalogued the one that exists.
How we know
Plato's dialogues survive nearly complete; about a third of Aristotle's writings survive, mostly as lecture notes. Xenophon and the playwright Aristophanes also describe Socrates.
Still debated
How much of the 'Socrates' in Plato's dialogues is the real man, and how much is Plato speaking through him, is a long-running debate.
Connections (6)
▸Greek philosophy: Socrates, Plato, Aristotle taught, through Aristotle, Alexander the GreatWell documented
The connection
Philip II hired Aristotle, Plato's star student, to tutor 13-year-old Alexander at Mieza from 343 BC for about three years. Aristotle taught him ethics, politics, medicine and Homer; Alexander reportedly kept an annotated Iliad under his pillow on campaign. His conquests later spread Greek ideas east, and he is said to have sent animal specimens back to Aristotle.
When and how
Mieza, Macedonia, about 343–340 BC; Aristotle and the teenage Alexander, with sons of Macedonian nobles.
How we know
Plutarch and other ancient biographers describe the tutoring. It is widely accepted, though details are thin and written centuries later.
Debates and open questions
How much Aristotle shaped Alexander is unclear; they diverged, since Aristotle saw non-Greeks as inferior while Alexander mixed cultures. The specimen story is doubtful.
▸Greek philosophy: Socrates, Plato, Aristotle was preserved and extended by Islamic Golden Age (Baghdad's House of Wisdom)Well documented
The connection
From the late 700s, Abbasid caliphs and patrons paid translators to put Aristotle, Plato, Euclid, Galen and Ptolemy into Arabic. Muslim philosophers then argued with and extended them: al-Farabi was called the 'Second Teacher' after Aristotle, Ibn Sina built a new system on him, and Ibn Rushd wrote famous commentaries.
When and how
Baghdad, about 750–1000, especially under Caliph al-Mamun (813–833); translators included the Christian physician Hunayn ibn Ishaq; later work in Persia and Córdoba.
How we know
Surviving Arabic translations, some of Greek works now lost in Greek; translators' notes; book catalogs like Ibn al-Nadim's Fihrist (987).
Debates and open questions
Why the translation movement happened is debated: practical needs like medicine and astronomy, political prestige, or rivalry with Byzantium.
▸Greek philosophy: Socrates, Plato, Aristotle was revived by The RenaissanceWell documented
The connection
Medieval Europe knew Aristotle mostly through Latin translations, often made from Arabic. Renaissance humanists wanted the original Greek. Byzantine scholars taught Greek in Florence from 1397, Cosimo de' Medici funded Marsilio Ficino to translate all of Plato into Latin, and Platonic ideas about beauty and the soul shaped art and thought.
When and how
Florence and other Italian cities, from 1397, when Manuel Chrysoloras began teaching Greek, to 1484, when Ficino's Plato appeared in print.
How we know
Ficino's translations and letters; Greek manuscripts bought for Italian libraries; paintings like Raphael's School of Athens (about 1510), with Plato and Aristotle at its center.
Debates and open questions
How much Renaissance Platonism changed thinking, rather than decorating it, is debated; Aristotle stayed central in universities throughout.
▸Ancient Greece: the city-states produced Greek philosophy: Socrates, Plato, AristotleWell documented
The connection
Greece's competitive, independent city-states, with busy trade, public debate and no all-powerful priesthood, gave thinkers room to question tradition. Philosophy began in Ionian cities like Miletus around 600 BC, then centered on wealthy, democratic Athens, where Socrates, Plato and Aristotle taught in the 400s and 300s BC.
When and how
Miletus, on Turkey's west coast (Thales, c. 585 BC), then Athens in the 5th–4th centuries BC.
How we know
Surviving texts by Plato and Aristotle, fragments of earlier thinkers quoted by later writers, and Athenian historical records.
Debates and open questions
Why philosophy arose in Greece just then, and how much it owed to Egyptian and Babylonian learning, is debated.
▸Athenian democracy condemned to death Socrates, a pillar of Greek philosophy: Socrates, Plato, AristotleWell documented
The connection
In 399 BC a jury of 501 Athenian citizens convicted Socrates of impiety and corrupting the young, and sentenced him to drink hemlock poison. The trial shaped philosophy: his student Plato came to distrust rule by the majority, and in the Republic imagined a state run by trained philosopher-kings instead.
When and how
Athens, 399 BC, a few years after defeat by Sparta and a brutal oligarchy; accusers Meletus, Anytus and Lycon.
How we know
Plato's Apology and Phaedo and Xenophon's account describe the trial and death; the charges are well attested.
Debates and open questions
Whether the real motive was religious or political is debated: some of Socrates' associates, notably Critias, had led the oligarchy of the Thirty.
▸Galileo Galilei disproved key ideas of Greek philosophy: Socrates, Plato, AristotleWell documented
The connection
For centuries European universities taught Aristotle's physics and an Earth-centered cosmos. Galileo's telescope (1609–10) revealed mountains on the Moon and moons circling Jupiter, contradicting Aristotle's perfect, Earth-centered heavens. His experiments rolling balls down ramps showed that, apart from air resistance, heavy and light objects fall at the same rate, overturning Aristotle's view.
When and how
Padua and Florence, Italy, early 1600s; his books The Starry Messenger (1610) and Two New Sciences (1638).
How we know
Galileo's published books and notebooks record his observations and experiments, which others repeated and confirmed.
Debates and open questions
Whether he really dropped balls from the Leaning Tower of Pisa is doubted; the story comes from a later biographer.