Alexander III of Macedon — universally known as Alexander the Great — accomplished in thirteen years what no other conqueror before or since has matched: he created an empire stretching from Greece to the borders of India, fundamentally transforming the ancient world and spreading Greek culture throughout the Middle East and Central Asia.
The Making of a King
Alexander was born in Pella, the Macedonian capital, the son of Philip II — the king who had transformed Macedonia into the dominant power in Greece — and Olympias, an Epirote princess of fierce temperament and fierce religious devotion. From both parents he received gifts that would define him: from his father, strategic brilliance and military organization; from his mother, a sense of divine destiny and an emotional intensity that never left him.
His education was entrusted to Aristotle, whom Philip employed as tutor from about 343 BC. Under Aristotle, Alexander developed a passion for Homer (he slept with a copy of the Iliad, annotated by Aristotle, under his pillow alongside a dagger), a deep interest in medicine, philosophy, and natural history, and a lifelong habit of intellectual curiosity that his campaigns never extinguished. He corresponded with Aristotle from Asia, sending back botanical and zoological specimens. He was, in short, the most educated conqueror of the ancient world.
At sixteen, while Philip was absent on campaign, Alexander suppressed a revolt by the Thracian tribe of the Maedi and founded his first city on the site. At eighteen, he commanded the decisive cavalry charge at the Battle of Chaeronea (338 BC), which established Macedonian supremacy over Greece. He was already, beyond doubt, a military genius.
When Philip was assassinated in 336 BC, Alexander moved with lethal swiftness to secure his throne — eliminating potential rivals and crushing a revolt by Thebes so thoroughly (razing the city and enslaving its population) that no other Greek city dared challenge him again. He preserved only the house of the poet Pindar, an act of cultural piety that his contemporaries noted.
The Persian Campaign
The invasion of Persia was the great project of the age, the unfinished ambition of Philip II. Alexander crossed the Hellespont in 334 BC with an army of around 40,000 men. At the Granicus River, he defeated the Persian satraps in a cavalry charge so reckless that he nearly lost his life — two Persians struck him from behind, and his second-in-command Cleitus the Black killed one of them, saving Alexander's life. (Years later, Alexander would kill Cleitus in a drunken rage — one of the acts that has complicated his legacy ever since.)
At Issus (333 BC), he met and routed the Persian King Darius III, who fled the battlefield in his chariot, leaving behind his mother, wife, and children. Alexander treated the royal family with elaborate courtesy — an act of propaganda as calculated as it was gracious.
He spent the next year reducing the coastline of the Levant, besieging Tyre for seven months (constructing a causeway to reach the island city, a feat of engineering that permanently altered the geography of the area), and taking Gaza. Egypt welcomed him as a liberator. At the oasis of Siwa, the oracle of Ammon declared him the son of the god — a claim Alexander neither confirmed nor denied, but which he found useful. He founded Alexandria at the mouth of the Nile, which would become one of the great cities of the ancient world.
At Gaugamela (331 BC), on a flat plain in modern Iraq chosen by Darius to give his scythed chariots room to maneuver, Alexander annihilated the Persian army. The oblique advance, the calculated gap in his line, the cavalry charge through it at precisely the right moment — the tactics at Gaugamela are still studied as a masterclass in generalship. Darius fled again; he was later murdered by his own satrap Bessus. Alexander had him buried with royal honors.
To the Ends of the Earth
But Alexander did not stop. He pressed on through modern-day Iran, Afghanistan, and Pakistan. He founded cities — Alexandrias — as he went. He crossed the Hindu Kush in winter, leading his men through snow and altitude that killed many. In Central Asia he faced a guerrilla war that lasted three years and was perhaps the hardest fighting of his campaigns. He took the local noblewoman Roxane as his first wife — a marriage that surprised his Macedonian officers.
At the Hydaspes River in modern Pakistan (326 BC), he fought his last great battle, against the Indian king Porus. Porus fought him with war elephants — a new and terrifying weapon for Alexander's cavalry — and was defeated, but with such valor that Alexander restored him to his kingdom as a vassal. It was the most chivalrous thing Alexander ever did.
Beyond the Hydaspes lay the rest of India. But Alexander's army, having marched ten thousand miles over eight years, mutinied. They would go no further. Alexander, furious, retired to his tent for three days — and then, accepting the inevitable, turned back.
The march back through the Gedrosian Desert was a catastrophe. Thousands died of thirst and heat. Whether Alexander chose the route as a punishment for some slight or simply miscalculated the difficulty is debated. He arrived in Persia diminished, though not broken.
He died in Babylon in June 323 BC, aged 32, after a fever that lasted ten days. The cause — typhoid fever, West Nile virus, excessive drinking, poison — has been debated ever since. When his generals asked who should inherit his empire, he reportedly said "the strongest" — or perhaps said nothing at all. The empire was divided among his generals (the Diadochi, "Successors"), and they spent the next forty years at war with each other.
Legacy
Alexander's conquests spread the Greek language and culture throughout the Middle East and Central Asia, creating the Hellenistic world that bridged Greek civilization and Rome. His conquests opened trade routes, spread ideas, and permanently altered the religious and cultural landscape of three continents. The Hebrew Bible was translated into Greek (the Septuagint) in Alexandria. Buddhism spread along Alexandrian trade routes. Greek philosophy reached India; Indian philosophy reached the West.
He has inspired every conqueror since. Caesar wept at a statue of Alexander. Napoleon kept his portrait in his campaigns. His life has generated more scholarly literature than any other figure of the ancient world except Caesar.
Whether he was a civilizing force or a destroyer — or both simultaneously — is a question that historians have not resolved and probably never will. What is beyond dispute is the scale: no individual in history shaped more of the world in a shorter time.