Jan Lipsansky: Czech writer M Alasdair MacIntyre: virtue ethicist and moral philosopher Gustav Mahler: Austrian composer; converted from Judaism. There is disagreement whether his conversion was a genuine or pragmatic one to overcome institutional and professional barriers against Jews Enrique de Malaca: Malay slave of Ferdinand Magellan; converted to Roman Catholicism after being purchased in 1511 Henry Edward Manning: English Anglican clergyman who became a Catholic Cardinal and Archbishop of Westminster Gabriel Marcel: leading Christian existentialist; his upbringing was agnostic Jacques Maritain: French Thomist philosopher; helped form the basis for international law and human rights law in his writings; also laid the intellectual foundation for the Christian democratic movement Taylor Marshall: American former Anglican priest, now a Catholic author and YouTuber/podcaster. Tobie Matthew: Member of English Parliament who became a Catholic priest Robert L. May: creator of Rudolph the Red-Nosed Reindeer; converted from Judaism after marrying his second wife, a Catholic. James McAuley: Australian poet; converted in 1952 Claude McKay: bisexual Jamaican poet; went from Communist-leaning atheist to an active Catholic Christian after a stroke Gavin McInnes: Canadian far-right activist. Founder of the Proud Boys. Marshall McLuhan: Canadian philosopher of communication theory; coined the terms "the medium is the message" and "global village"; converted in 1937 after reading the works of G.K. Chesterton Thomas Merton: American Trappist monk and spiritual writer Vittorio Messori: Italian journalist and writer called the "most translated Catholic writer in the world" by Sandro Magister; before his conversion in 1964 he had a "perspective as a secularist and agnostic" Alice Meynell: poet and suffragist Czesław Miłosz: poet, prose writer, translator and diplomat; awarded the Neustadt International Prize for Literature and the 1980 Nobel Prize in Literature John Brande Morris: priest, writer, student of Patristic theology, and scholar of the Syriac language Henry Morse: one of the Forty Martyrs of England and Wales Malcolm Muggeridge: British journalist and author who went from agnosticism to the Catholic Church William Munk: English physician and medical historian remembered chiefly for "Munk's Roll", a biographical reference work on the Royal College of Physicians. N Takashi Nagai: physician specializing in radiology; author of The Bells of Nagasaki Bernard Nathanson: Jewish convert and medical doctor; a founding member of NARAL; he later recanted and became an anti-abortion proponent Michael Nazir-Ali: Anglican Bishop of Rochester from 1994 to 2009. Currently the director of the Oxford Centre for Training, Research, Advocacy and Dialogue. Converted to