An influential American philosopher, Alasdair Chalmers MacIntyre (born 1929) wrote widely on such diverse topics as Marxism, the concept of the unconscious, the history of ethics, and the concepts of virtue and justice. He made a vital contribution to the revival of contemporary interest in the ethical systems of Aristotle and Aquinas and many significant contributions to the history of philosophy and ethical theory.

Alasdair Chalmers MacIntyre was born on January 12, 1929, in Glasgow, Scotland, to John and Emily (Chalmers) MacIntyre. He was educated at the University of London and Oxford University and began his teaching career in Great Britain at Manchester University in 1951. He also taught at Leeds University, Essex University and Oxford. In 1969 he came to the United States and took a position as professor of the history of ideas at Brandeis University. In 1972 he was appointed dean of the College of Liberal Arts and professor of philosophy...