Avicenna (Ibn Sina)

By Laura Whitfield

By eighteen he had mastered every science of his age; by forty he had written the book that would rule medicine for six centuries. Abu Ali al-Husayn ibn Sina — Avicenna to the West — was the most famous physician in history and one of its greatest philosophers: a child prodigy from Bukhara who became the intellectual colossus of the Islamic Golden Age.

The prodigy stories are well attested: by ten he knew the Quran by heart; by sixteen he was practicing medicine; at eighteen, he wrote, there was nothing he had not studied — and then he cured the Samanid prince Nuh ibn Mansur of an illness that had baffled the court physicians, earning access to the royal library, which he devoured. Then the world turned upside down: dynasties fell, patrons died, and Avicenna spent his adult life moving between courts in Persia — Gurganj, Rayy, Hamadan, Isfahan — serving as physician, vizier, and sometimes prisoner, writing at night after days of administration. He is said to have composed with a glass of wine at his elbow and to have dictated to scribes while traveling.

The Canon of Medicine — al-Qanun fi al-Tibb, five volumes, over a million words — is the most influential medical book ever written. It systematized everything: anatomy, physiology, pathology, pharmacology (with 760 drugs catalogued and tested), surgery, and hygiene. It introduced quarantine as a method against contagion, described meningitis, recognized the contagious nature of tuberculosis, detailed diabetes symptoms, conducted early clinical trials of drugs, and insisted on the testing of medicines under controlled conditions. Translated into Latin in the twelfth century, it became the core medical textbook of European universities — taught at Montpellier and Bologna into the 1600s, reprinted sixty times.

Avicenna the philosopher was equally formidable: his metaphysics of essence and existence shaped Islamic, Jewish, and Christian thought — Aquinas argued with him constantly. His flying man thought experiment, imagining a consciousness suspended in air with no sensory input, remains a landmark in the philosophy of mind. He wrote on logic, physics, astronomy, and music, some 240 works in all.

He died in 1037 in Hamadan, aged fifty-six, of colic — reportedly worsened by his own overindulgence and his physicians' overdoses, a final irony for the prince of physicians. The Canon outlived every dynasty he served. When Europe finally built modern medicine, it built on the scaffolding he had raised.

Impact on civilization

Avicenna's Canon organized all medical knowledge into a single teachable system and held the curriculum of the world's universities — Islamic and European — for six hundred years. His clinical innovations — quarantine, contagion theory, drug testing, systematic pharmacology — founded preventive medicine and clinical pharmacology. As a philosopher he set the terms of metaphysical debate for three civilizations. No single book has taught more doctors, across more centuries and more cultures, than the Canon of Medicine — the most taught book in medical history.