I taught a class with Ken Arrow and John Rawls in ’68-’69. I was visiting here at Harvard. Arrow was then on the faculty of Harvard for some years, and Rawls was very established at Harvard. So the three of us together, we did a class on justice and social choice, which was quite fun. I remember, while flying to a meeting in Washington, my neighbor on the plane asked me what did I do? I said, “I teach in Delhi, but at the moment I’m visiting Harvard.” I told him that I’m concerned with justice and social choice involving aggregation of individuals’ disparate views. And he said, “Oh, let me tell you: There is a very interesting class taught by Kenneth Arrow, John Rawls, and some unknown guy on this very subject. You should check it out!”

Amartya Sen, ‘I’ve never done work that I was not interested in. That is a very good reason to go on’, The Harvard Gazette, June 3, 2021