1126-1198 CE
Philosophy and religion are two paths to one truth — <a href="https://askthepolymath.com/philosopher/aristotle/" class="philosopher-link" data-philosopher-id="4869">Aristotle</a> reached by reason what the Quran teaches through revelation.
Abu al-Walid Muhammad ibn Ahmad ibn Rushd was born in 1126 CE in Córdoba, the intellectual capital of Islamic Spain. His family dominated Córdoban jurisprudence: his grandfather had been chief qadi and imam of the great mosque; his father held the same positions. Young Ibn Rushd was groomed for leadership in religious law.
But al-Andalus valued polymaths. He studied theology, jurisprudence, medicine, mathematics, astronomy, and philosophy — the full range of Islamic sciences. He became expert in Maliki law, serving as qadi (judge) in Seville, then in Córdoba. He practiced medicine, writing a comprehensive medical encyclopedia, Kitab al-Kulliyat (known in Latin as Colliget). And he devoted himself to philosophy, especially Aristotle.
His philosophical career began through patronage. In 1169, his friend Ibn Tufayl, court physician to the Almohad caliph Abu Yaqub Yusuf, introduced him to the ruler. The caliph complained that Aristotle’s works were difficult — the existing translations and commentaries were inadequate. Would Ibn Rushd undertake new commentaries? He would. For the next three decades, he produced commentaries on nearly every Aristotelian text: short epitomes, middle commentaries, and long line-by-line analyses. His commentaries were so definitive that Latin scholastics called him simply “The Commentator,” as they called Aristotle “The Philosopher.”
His most original work was the Tahafut al-Tahafut (Incoherence of the Incoherence), a point-by-point refutation of al-Ghazali’s Incoherence of the Philosophers. Where al-Ghazali charged that philosophers contradicted reason and religion, Ibn Rushd defended philosophy on both counts. The philosophers’ positions were rationally sound; properly understood, they didn’t contradict revelation. Philosophy and religion are two roads to one truth.
He also wrote the Fasl al-Maqal (Decisive Treatise), arguing that philosophy is not merely permitted but required by Islamic law — for those capable of it. The Quran commands reflection on creation; demonstration (philosophical proof) is the highest form of reflection; therefore, the Quran commands philosophy. Different people access truth differently: philosophers through demonstration, theologians through dialectic, ordinary believers through rhetoric and stories. All reach the same destination by different paths.
This harmonizing project worked — until it didn’t. In 1195, the caliph Abu Yusuf Ya’qub al-Mansur, perhaps pressured by conservative jurists or seeking political support before a military campaign, turned against philosophy. Ibn Rushd was exiled to Lucena, a small town near Córdoba; his books were burned; the study of philosophy was banned. He was 69.
The exile was brief. Al-Mansur relented; Ibn Rushd was recalled to Marrakesh and restored to favor. But he was old and broken. He died in 1198, aged 72. His body was eventually returned to Córdoba, the city that had shaped him.
His influence in the Islamic world faded quickly. Al-Ghazali’s synthesis of law and Sufism dominated; philosophy retreated to Persia. But Latin translations of his commentaries, made in Toledo, transformed European thought. “Averroes, who made the great commentary” — Dante placed him in Limbo among the virtuous pagans. For three centuries, understanding Aristotle meant reading Averroes.
"Philosophy and revelation are both true; truth cannot contradict truth. Where they seem to conflict, the apparent meaning of scripture must be interpreted allegorically."
— Fasl al-Maqal (Decisive Treatise) — the harmony of faith and reason
"The double-truth theory is absurd. There are not two truths; there is one truth reached by different methods suited to different capacities."
— Against the view (falsely attributed to him) that philosophy and religion teach contradictory truths
"Demonstration is the highest form of reasoning, and the Quran commands us to reason. Therefore, philosophy is not merely permitted but obligatory — for those capable of it."
— Fasl al-Maqal — the legal argument for philosophy
Averroes positioned himself as Aristotle’s truest interpreter, correcting both Neoplatonic distortions and al-Ghazali’s misunderstandings. His commentaries strip away the emanationist metaphysics that al-Farabi and Avicenna had added; he returns to Aristotle’s own texts, reading them with unprecedented care.
His defense of philosophy against al-Ghazali operates on two fronts: rational and religious. On the rational front, he argues that al-Ghazali misunderstood the philosophers’ positions. Take causation: al-Ghazali denied necessary connection between cause and effect, claiming God directly creates each event. Averroes responds that this makes knowledge impossible — if fire doesn’t necessarily burn, nothing can be predicted or understood. The regularities of nature are not God’s arbitrary “custom” but the natures of things themselves. God acts through secondary causes, not by constant miracle.
On the world’s eternity: al-Ghazali insisted on temporal creation. Averroes argues that eternal creation is coherent — God eternally causes the world to exist, without temporal beginning. This doesn’t limit God; it expresses God’s eternal nature. An eternal world doesn’t compete with God; it flows from God necessarily as light flows from the sun.
On God’s knowledge: al-Ghazali charged that philosophers denied God knows particulars. Averroes distinguishes: God knows all things, but not in the way we know them — through sense perception and temporal awareness. God knows things in their causes, eternally and universally. This isn’t limited knowledge; it’s more perfect knowledge.
On the soul: here Averroes diverges from both Avicenna and Aristotle (as often interpreted). He holds that the material intellect — the potential for understanding — is one for all humanity. Individual souls are mortal; what survives is the universal intellect in which all humans participate when they think. This denies personal immortality in the straightforward sense, though Averroes’s interpreters debated what he really meant. The doctrine was controversial in Islam and explosive in Christianity.
His harmonization of philosophy and religion is sophisticated. The Fasl al-Maqal argues that the Quran addresses different audiences differently: the masses through rhetoric and stories, the educated through dialectical theology, the philosophers through demonstration. All teach the same truth; the difference is in mode, not content. Where scripture’s apparent meaning contradicts demonstration, scripture must be interpreted allegorically — but only by those qualified. Ordinary believers should not hear philosophical interpretations that might confuse them.
This isn’t “double truth” — the charge later leveled against Latin Averroists. Averroes insists there is one truth, reached by different methods. Philosophy and religion cannot ultimately contradict; apparent contradictions arise from misunderstanding one or the other. His project is synthesis, not separation.