The Islamic Golden Age (roughly 8th-13th centuries AD) was built on an extraordinary foundation of translated ancient knowledge. The translation movement, concentrated in Baghdad under Abbasid patronage, systematically converted Greek scientific, philosophical, and medical texts into Arabic over roughly a century.

The translators were predominantly Syriac Christians — the educated elite of the eastern Mediterranean who had maintained knowledge of Greek while the Latin West lost it. Hunayn ibn Ishaq and his school were responsible for translations of most of Galen's medical works, large portions of Aristotle, and many scientific texts. The quality of these translations was high — Hunayn describes his method of comparing multiple Greek manuscripts before translating, an approach that anticipates modern textual criticism.

The Arabic reception of ancient knowledge was not passive transmission but active engagement. Al-Kindi, Al-Farabi, and Ibn Sina (Avicenna) wrote systematic commentaries on Aristotle that engaged with and extended his arguments. Al-Khwarizmi's work on algebra (the word is Arabic, from his title) developed systematic procedures for solving equations that went far beyond anything in the Greek mathematical tradition. Al-Biruni's comparative anthropology of India represents an approach to cross-cultural study that has no classical Greek or Roman equivalent.

The reintroduction of this material to Western Europe through Toledo (where Christian translators worked from Arabic into Latin beginning in the 12th century) and through Norman Sicily transformed medieval Western intellectual culture. The curriculum of medieval European universities was substantially built on Arabic versions of ancient texts.