Al-Ghazali and the Philosophical Challenge: Context of Tahafut al-Falasifah

When al-Ghazali wrote Tahafut al-Falasifah — 'The Incoherence of the Philosophers' — around 488 AH (1095 CE) while holding the prestigious chair at the Baghdad Nizamiyyah, he was at the height of his fame as the leading Islamic scholar of his age. The work was a calculated intervention in a debate that had been building in Islamic intellectual culture for over two centuries: the reception of Greek philosophy, particularly the Neo-Platonized Aristotelianism of al-Farabi and Ibn Sina, and the question of whether philosophical reasoning was compatible with or subversive of Islamic theology.

Al-Farabi (d. 339 AH/950 CE) and especially Ibn Sina (d. 428 AH/1037 CE) had, by al-Ghazali's time, produced enormously sophisticated philosophical systems that drew on Aristotle, Plato, and the Neo-Platonic tradition while claiming to be compatible with Islam. Ibn Sina's philosophy in particular had achieved wide circulation and was being read by students who found it intellectually compelling. Some of these students were drawing theological conclusions from philosophical premises that al-Ghazali considered dangerous to Islamic belief.

Before writing the Tahafut, al-Ghazali wrote Maqasid al-Falasifah — 'The Aims of the Philosophers' — a careful and neutral exposition of the philosophical positions he was about to critique. This preparatory work reflected al-Ghazali's intellectual integrity: he was not going to attack positions he had not first taken the trouble to understand accurately and present fairly. The Maqasid became a widely read introduction to Islamic philosophy in its own right.

With this preparation complete, al-Ghazali wrote the Tahafut to demonstrate, through detailed philosophical argumentation, that the metaphysical and physical claims of al-Farabi and Ibn Sina were internally inconsistent and rationally untenable — that philosophy, on its own terms, failed to establish what the philosophers claimed to establish. His strategy was to beat the philosophers at their own game: not to appeal to revelation against reason, but to show that philosophical reason, properly applied, undermined the philosophers' specific conclusions.