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John Mitchell Finnis (born 28 July 1940 in Adelaide, South Australia) is a British-Australian legal philosopher, jurist, and professor emeritus at Oxford University. He is a leading proponent of the 'new natural law' theory, building on the works of Aristotle and Thomas Aquinas, and has profoundly influenced conservative ethics, jurisprudence, moral philosophy, epistemology, metaphysics, and political theory. Educated at St. Peter's College in Adelaide, the University of Adelaide (BA, 1961), Oxford University as a Rhodes Scholar (BA in Jurisprudence, 1963; MA, 1967), and Yale Law School (LLM, 1965), Finnis has held academic positions at Oxford and the University of Notre Dame. His seminal book 'Natural Law and Natural Rights' (1980) is a cornerstone of modern natural law scholarship. He has collaborated closely with Germain Grisez and influenced contemporary thinkers like Ryan T. Anderson. Beyond academia, Finnis has served as a consultant to governmental bodies such as the Australian Law Reform Commission and contributed to public discourse on ethics, human rights, constitutional law, marriage, sexuality, and bioethics. He holds Australian and United States nationalities and remains active in scholarly circles, integrating faith, reason, and law.