William of Ockham is best known today for the model of problem solving known as Ockham’s (or Occam’s) Razor. But the event that defined his life was an argument with Pope John XXII.

Research:

• Lieberich, Heinz. "Louis IV". Encyclopedia Britannica, 7 Oct. 2022, https://www.britannica.com/biography/Louis-IV-Holy-Roman-emperor
• Kilcullen, John. “Ockham’s Political Writings.” “The Cambridge Companion to Ockham. Cambridge University Press. 1999. Republished online: http://publications.thebritishacademy.ac.uk/pubs/dialogus/polth.html
• Britannica, The Editors of Encyclopaedia. "Peter Lombard". Encyclopedia Britannica, 20 Aug. 2020, https://www.britannica.com/biography/Peter-Lombard
• Gál, Gedeon, O.F.M. "William of Ockham Died "impenitent" in April 1347." Franciscan Studies, vol. 42, 1982, p. 90-95. Project MUSE, doi:10.1353/frc.1982.0011
• Lambert, M. D. “THE FRANCISCAN CRISIS UNDER JOHN XXII.” Franciscan Studies, vol. 32, 1972, pp. 123–43. JSTOR, http://www.jstor.org/stable/44000287
• Donovan, Stephen M. “Bonagratia of Bergamo.” Catholic Encyclopedia. https://www.catholic.com/encyclopedia/bonagratia-of-bergamo
• Nold, Patrick. “Pope John XXII’s Annotations on the Franciscan Rule: Content and Contexts.” Franciscan Studies, vol. 65, 2007, pp. 295–324. JSTOR, http://www.jstor.org/stable/41975430
• Knysh, George. “BIOGRAPHICAL RECTIFICATIONS CONCERNING OCKHAM’S AVIGNON PERIOD.” Franciscan Studies, vol. 46, 1986, pp. 61–91. JSTOR, http://www.jstor.org/stable/41975065
• Spade, Paul Vincent. “William of Ockham.” Stanford Encyclopedia of Philosophy. March 5, 2019. https://plato.stanford.edu/entries/ockham/
• Vignaux, Paul D.. "William of Ockham". Encyclopedia Britannica, 24 Aug. 2022, https://www.britannica.com/biography/William-of-Ockham