Aristotle

Life and legacy

Aristotle was born in 384 BCE in Stagira, a small Greek city in Chalcidice, near the border of Macedon. His father, Nicomachus, was the personal physician to King Amyntas III of Macedon, which gave Aristotle early connections to the Macedonian court. At seventeen he traveled to Athens and entered Plato's Academy, where he studied and taught for twenty years until Plato's death in 348/347 BCE. He did not succeed Plato as head of the Academy - that position went to Plato's nephew Speusippus - and he left Athens, spending several years in Asia Minor and on the island of Lesbos, where he conducted pioneering biological research.

In 343 BCE, Philip II of Macedon invited Aristotle to tutor his son Alexander, then thirteen years old. The details of this famous pedagogical relationship are largely lost, but ancient sources report that Aristotle introduced Alexander to Homer, natural science, and political philosophy. When Alexander assumed the throne and launched his conquests, Aristotle returned to Athens in 335 BCE and founded his own school, the Lyceum, in a grove sacred to Apollo Lykeios. The school became known as the Peripatetic school, reportedly because Aristotle liked to walk (peripatein) while teaching.

Aristotle's output was staggering in both volume and range. In logic, he invented the syllogism and created formal logic as a discipline - a system so complete that Kant later said it had not needed to take a single step forward since Aristotle. In metaphysics, he broke with Plato's Theory of Forms, arguing that form and matter are inseparable in individual substances rather than existing in a separate realm. His Nicomachean Ethics, with its analysis of virtue as a mean between extremes and its identification of eudaimonia (flourishing) as the highest human good, remains one of the most influential works of moral philosophy. His Politics analyzed constitutions and political systems with empirical rigor, drawing on a collection of 158 constitutions of Greek city-states.

In the natural sciences, Aristotle was centuries ahead of his time in some respects and famously wrong in others. His biological works - History of Animals, Parts of Animals, Generation of Animals - are monuments of careful observation. He dissected dozens of animal species, described the development of the chick embryo, recognized that dolphins are mammals, and classified animals with a sophistication not surpassed until Linnaeus in the 18th century. His physics, however, which posited a geocentric cosmos, natural places for the elements, and the impossibility of void, would eventually be overthrown by Galileo and Newton.

After Alexander's death in 323 BCE, anti-Macedonian sentiment surged in Athens. Aristotle, mindful of Socrates's fate, reportedly said he would not allow Athens to sin twice against philosophy, and withdrew to Chalcis on the island of Euboea, where he died the following year at the age of sixty-two. His works were transmitted through a remarkable chain: rediscovered in a cellar in Asia Minor in the 1st century BCE, edited by Andronicus of Rhodes, translated into Arabic by scholars in Baghdad during the Islamic Golden Age, and then retransmitted to medieval Europe through Latin translations of the Arabic. Through Thomas Aquinas and the Scholastics, Aristotle became "The Philosopher" - the supreme intellectual authority of the medieval world.

Key accomplishments

• Invented formal logic (the syllogism), creating the discipline that governed reasoning for over two thousand years
• Founded the Lyceum (335 BCE), one of the great intellectual institutions of the ancient world
• Wrote the Nicomachean Ethics, the most influential work of virtue ethics in Western philosophy
• Conducted pioneering biological research, classifying and dissecting hundreds of animal species with unprecedented rigor
• Tutored Alexander the Great, shaping the intellectual formation of the ancient world's most consequential conqueror
• His works, transmitted through Arabic and Latin translations, became the foundation of medieval European and Islamic scholarship

Quotes

We become just by doing just acts, temperate by doing temperate acts, brave by doing brave acts.

Nicomachean Ethics, Book II, 1103b (translated by W.D. Ross, 1925 - public domain)

One swallow does not make a summer, neither does one fine day; similarly one day or brief time of happiness does not make a person entirely happy.

Nicomachean Ethics, Book I, 1098a18 (translated by W.D. Ross, 1925 - public domain)

Related figures