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 See omnystudio.com/listener for privacy information.