When I arrived in the fall of 1969, there was a philosophy course listed in the catalog entitled “Capitalism.” And the course description was “a moral examination of capitalism.” Of course, for most students, then, it would be taken for granted that a moral examination would be a moral condemnation of capitalism. But that’s not what I intended. We were going to read critics of capitalism. But we were also planning to read defenses of capitalism, and I was going to construct some of my own in the lectures. Some of the graduate students in the philosophy department knew what ideas I held, and they weren’t very happy about a course being taught in the department defending those ideas. Now it was true that there was another course in the department on Marxism by someone who was then a member of the Maoist Progressive Labor Party and students did not object to that. But still some students objected to my giving a lecture course on capitalism. I remember early in the fall (I guess I was scheduled to give the course in the spring term), a graduate student came to me at a departmental reception we had, and said, “We don’t know if you’re going to be allowed to give this course.” I said “What do you mean, not allowed to give this course?” He said, “Well, we know what ideas you hold. We just don’t know whether you will be allowed to give the course.” And I said, “If you come and disrupt my course, I’m going to beat the shit out of you!”
Robert Nozick, in Albert Zlabinger, ‘An Interview with Robert Nozick’, Libertarian Review (December, 1977), p. 15