Alasdair MacIntyre (1929–2025) was a Scottish-born philosopher who taught in Britain and, from 1970, in the United States, including long periods at the University of Notre Dame. Once a Marxist, he became a Catholic in the 1980s and is best known for reviving the ethics of the virtues in the tradition of Aristotle and Thomas Aquinas, beginning with After Virtue (1981).
After Virtue is a work of moral philosophy by Alasdair MacIntyre, first published in 1981, with later editions in 1984 and 2007. It begins with an unsettling thought experiment.