Duns Scotus

John Duns Scotus (c. 1265/66 – 8 November 1308) was a Scottish Catholic priest, Franciscan friar, university professor, philosopher, and theologian. Alongside Thomas Aquinas, Bonaventure, and William of Ockham, he ranks among the most significant philosopher-theologians of the later medieval period in Western Christendom. His work has shaped both Catholic and secular thinking.

Scotus is best known for several key doctrines: the "univocity of being," which holds that existence is the most abstract concept we can apply to anything that exists; the "formal distinction," a method for separating different aspects of the same thing; and "haecceity," the unique property that makes each individual thing what it is—its "thisness." He also crafted a complex argument for God’s existence and defended the Immaculate Conception of Mary. The tradition of thought stemming from his work is called Scotism. For his sharp and subtle reasoning, he earned the scholastic title *Doctor Subtilis* ("the Subtle Doctor"). Pope John Paul II beatified him in 1993.

**Life**

Little is known about Scotus’s life beyond his writings. He was likely born between 23 December 1265 and 17 March 1266 into a leading local family. A cairn erected in 1966 by Franciscan friars of the United Kingdom marks the reputed site of his birth, near the Pavilion Lodge at Duns Castle in Scotland, commemorating the 700th anniversary. He received the Franciscan habit at Dumfries, where his uncle, Elias Duns, served as guardian.

The first firm date in his life is his ordination as a priest on 17 March 1291 at St Andrew’s, Northampton, England. Since the minimum age for ordination was 25, scholars assume he was ordained as soon as allowed. Contemporaries called him Johannes Duns, following the medieval custom of using a Christian name followed by a place of origin, suggesting he came from Duns in Berwickshire, Scotland.

Tradition holds that Scotus studied at a Franciscan *studium generale* in Oxford, located behind St Ebbe’s Church in a triangular area bounded by Pennyfarthing Street, St Aldate’s, the castle, and the old wall. The Friars Minor had moved there when the University of Paris was dispersed in 1229–30. At the time, about 270 people lived there, roughly 80 of them friars.

Scotus appears to have been in Oxford by 1300, listed among friars for whom the provincial superior of the English ecclesiastical province (including Scotland) requested faculties from the Bishop of Lincoln to hear confessions. He participated in a disputation under regent master Philip of Bridlington in 1300–01. He began lecturing on Peter Lombard’s *Sentences* at the University of Paris in late 1302. Later that academic year, he was expelled for siding with Pope Boniface VIII in his conflict with King Philip IV of France over taxing church property.

He returned to Paris by the end of 1304, likely in May, and continued lecturing until, for reasons still unclear, he was sent to the Franciscan *studium* in Cologne, probably in October 1307. According to 15th-century writer William Vorilong, his departure was sudden and unexpected. While relaxing or talking with students in the *Prato clericorum* (Pré-aux-Clercs), an open area on the Rive Gauche used by scholars, orders arrived from the Franciscan Minister General. Scotus left immediately, taking few or no belongings.

He died unexpectedly in Cologne in November 1308, traditionally on 8 November, and is buried in the local Church of the Friars Minor. His sarcophagus bears a Latin poem. The story that he was buried alive, in the absence of a servant who knew of his susceptibility to coma, is likely a myth; the first known mention of it dates from around 1400. Francis Bacon later reported it in his *Historia vitae et mortis*. A colophon in Codex 66 of Merton College, Oxford, indicates Scotus also studied at Cambridge.

**Work**

Scotus’s major work is his commentary on Peter Lombard’s *Sentences*, which contains nearly all the philosophical views and arguments for which he is known: the univocity of being, the formal distinction, less-than-numerical unity, individual nature or haecceity, his critique of illuminationism, and his famous argument for God’s existence. The commentary exists in several versions. The standard one is the *Ordinatio* (also called the *Opus oxoniense*), a revised version of lectures he gave as a bachelor at Oxford. He likely began the initial revision in the summer of 1300—the Prologue, question 2, alludes to the Battle of Wadi al-Khazandar in 1299, news of which probably reached Oxford that summer. It remained unfinished when he left for Paris in 1302.

The two other versions are Scotus’s own notes for the Oxford lectures, recently transcribed and published as the *Lectura* (the first book probably written in Oxford in the late 1290s), and the *Reportatio parisiensis* (or *Opus parisiense*), which consists of student transcriptions of his Paris lectures on the *Sentences*. A *reportatio* is a student report or transcription of the original lecture.