Hilary Putnam was born on 31 July 1926 in Chicago, Illinois. He received his BA in 1948 from the University of Pennsylvania, majoring in mathematics and philosophy. He received his PhD in philosophy at the University of California at Los Angeles in 1951, working with Hans Reichenbach. Putnam taught philosophy at Northwestern University in 195253 and at Princeton University from 1953 to 1961, and then he was professor of philosophy of science at Massachusetts Institute of Technology from 1961 to 1965. He became professor of philosophy at Harvard in 1965 and remained there the rest of his career. In 1976 he became Walter Beverley Pearson Professor of Modern Mathematics and Mathematical Logic; later he was also named Cogan University Professor. He retired from teaching in 2000. A bibliography of his writings was published in 2015.