He was twenty when he took the throne and thirty-two when he died in Babylon. In between, Alexander of Macedon conquered more of the earth than any man before him — and in doing so stitched East to West into a single connected world for the first time in history.
The empire in images
The discovery
In twelve years, from 336 to 323 BC, Alexander marched some twenty thousand miles: down through Greece, across to Egypt, through the heart of the Persian Empire, over the Hindu Kush, and to the Indus River in India. No army had ever moved that far, that fast, or held together while doing it. He never lost a battle — and he never went home.
By whom
By Alexander III of Macedon, son of Philip II — the military genius who built the army — and pupil of Aristotle, who filled the boy’s head with Homer and the idea that Greeks were meant to rule barbarians. Around him marched forty thousand Macedonians and Greeks, and the generals who would inherit his world: Ptolemy, who took Egypt; Seleucus, who took Asia; Antigonus and the rest, who spent the next forty years fighting over the pieces.
How it happened
Speed, siegecraft, and theater. At the Granicus, Issus, and finally Gaugamela in 331 BC, Alexander’s compact phalanx and Companion cavalry shattered the vast armies of Darius III — quality devouring quantity. The seven-month siege of Tyre, an island fortress, announced that no wall could stop him. In Egypt he founded Alexandria in 331 BC, the city that would house the great Library and the Pharos lighthouse, a wonder of the world. He married Persian noblewomen at Susa, dressed his court in Persian robes, and recruited Persian cavalry — fusion as policy. Then, in Babylon in 323 BC, at thirty-two, fever killed him — and the greatest empire ever assembled was auctioned to his generals.
The shockwave: how it changed the world
Alexander’s true conquest was not territory but connection. He planted Greek-speaking cities — more than twenty Alexandrias — from Egypt to Central Asia, and the common Greek that resulted, Koine, became the first global language: the tongue of merchants, scholars, and eventually the New Testament, spoken from Marseille to the Punjab. Culture fused at a scale never seen: Greek sculptors carved the first human images of the Buddha in Gandhara, draped in togas; Babylonian astronomy met Greek geometry; Egyptian priests and Persian administrators worked in Greek.
Alexandria became the mind of the ancient world: Euclid wrote his Elements there, Archimedes studied there, Eratosthenes measured the circumference of the Earth there — to within a few percent — two thousand years before anyone else tried. Trade routes hardened into the arteries that would become the Silk Road, binding China, India, Persia, and the Mediterranean into one commercial system.
Rome inherited the eastern half of his world intact — its language, its cities, its science — and through Rome and Byzantium and Baghdad, the Hellenistic inheritance reached the Renaissance and the modern age. The nation-state would later pretend the world was naturally divided; Alexander proved, twenty-three centuries early, that it is naturally connected. Globalization is not new. It has a founder, and he died at thirty-two.