Kilwardby studied at the University of Paris, then was a teacher of grammar and logic there. He then joined the Dominican Order and studied theology, and became regent at Oxford University before 1261, probably by 1245. He was named provincialprior of the Dominicans for England in 1261, and in October 1272 Pope Gregory X appointed him as Archbishop of Canterbury to end a dispute over the election. Kilwardby was provided to the archbishopric on 11 October 1272, given the temporalities on 12 December 1272, and consecrated on 26 February 1273. Kilwardby crowned Edward I and his wife Eleanor as king and queen of England in August 1274, but otherwise took little part in politics. He instead concentrated on his ecclesiastical duties, including charity to the poor and donating to the Dominicans. In 1278 Pope Nicholas III named Kilwardby Cardinal Bishop of Porto and Santa Rufina. He then resigned Canterbury and left England, taking with him papers, registers and documents belonging to the see. He also left the see deep in debt again, after his predecessor had cleared the debt. He died in Italy in 1279 and was buried in the Dominican convent in Viterbo, Italy. While in theory this was a promotion, probably it was not, as the pope was unhappy with Kilwardby's support of efforts to resist the payment of papal revenues and with the lack of effort towards the reforms demanded at the Second Council of Lyon in 1274. Kilwardby's theological and philosophical views were summed up by David Knowles who said that he was a "conservative eclectic, holding the doctrine of seminal tendencies and opposing...the Aristotelian doctrine of the unity of form in beings, including man." Some sources state that he was the author of Summa Philosophiae, a history and description of the schools of philosophical thought then current, but the writing style is not similar to his other works, and Knowles, for one, does not believe it was authored by Kilwardby. It has been alleged that Kilwardby was an opponent of Thomas Aquinas. In 1277 he prohibited the teaching of thirty theses, some of which have been thought to touch upon Thomas Aquinas' teaching. Recent scholars, however, such as Roland Hissette, have challenged this interpretation.
Works
Writings on grammar
Commentaria Priscianus minor
Writings on logic
Notulae super librum Praedicamentorum
Notulae super librum Perihermeneias
Notule libri Priorum
Notule libri Posteriorum
Comentum super librum Topicorum
Notulae super librum Porphyrii
De natura relationis
Priorum Analyticorum expositio
Notuale super librum Sex Principiorum
Writings on natural philosophy
De spiritu fantastico sive de receptione specierum
De tempore
Writings on ethics
Quaestiones supra libros Ethicorum
Quaestiones in librum primun Sententiarum
Quaestiones in librum secundum Sententiarum
Quaestiones in librum tertium Sententiarum
Quaestiones in librum quartum Sententiarum
De ortu scientiarum
De tempore has been edited and translated by Alexander Broadie, and published as On Time and Imagination, Part 2: Introduction and Translation. A critical edition of De orto scientiarum was published by Albert G. Judy, for The Pontifical Institute of Mediaeval Studies in 1976. The Notuel libri Priorum, has been edited and translated by Paul Thom and John Scott, Oxford: Published for the British academy by Oxford University Press, 2015. Kilwardby was also the author of a summary of the writings of the Church Fathers, arranged alphabetically, Tabulae super Originalia Patrum, edited by Daniel A. Callus.
