Aryeh Kosman (1935 – June 17, 2021) was a scholar of ancient Greek philosophy and a professor of philosophy at Haverford College. Born in Oakland, California, Louis Aryeh Kosman was always known professionally by his middle name.[1][2] He earned undergraduate and master's degrees from the University of California, Berkeley, and a PhD from Harvard University. He came to Haverford as an assistant professor in 1962, was promoted to full professor in 1973, and was appointed John Whitehead Professor of Philosophy at Haverford in 1984. He retired in 2010.[1] He was the author of two books on Plato and Aristotle published by the Harvard University Press.[3]