Ibn Aqil al-Hanbali

Abu al-Wafa Ali ibn Aqil ibn Muhammad al-Baghdadi (431-513 AH / 1040-1119 CE) was one of the most brilliant and original Hanbali scholars of Baghdad. Born in Baghdad, he studied under the leading Hanbali scholars of the city including al-Sharif Abu Ja'far and Ibn Qudwah. He eventually became the head of the Hanbali school in Baghdad.

Ibn Aqil's most remarkable scholarly achievement was al-Funun (also called Kitab al-Funun), a massive encyclopedic work said to have run to over 800 volumes in his original manuscript, making it one of the largest single-authored works in Islamic history. It was a vast compilation of reflections, observations, questions, and answers across virtually every field of knowledge — theology, jurisprudence, philosophy, ethics, literature, and more. Much of it is now lost.

He was known for his bold intellectual curiosity and his willingness to engage with the philosophical currents of his time, which at points brought him into conflict with traditionalists, particularly in the context of the Hanbali establishment. He reportedly associated with Mu'tazili intellectuals in his youth and was required to publicly repent. His later works, however, are firmly within the Hanbali tradition.

Ibn Aqil authored works on Hanbali jurisprudence and legal methodology, and was a significant figure in the intellectual life of Baghdad during the Seljuk period. He passed away in Baghdad in 513 AH. He is remembered as one of the most intellectually expansive scholars the Hanbali tradition produced.