"Under Milton Friedman’s influence, the free-market ideology shifted toward unmitigated laissez-faire. Whereas earlier advocates had worried about the stringent conditions that were needed for unregulated markets to work their magic, Friedman was the master of clever (sometimes too clever) arguments to the effect that those conditions were not really needed, or that they were actually met in real-world markets despite what looked a lot like evidence to the contrary. He was a natural-born debater: single-minded, earnestly persuasive, ingenious, and relentless. My late friend and colleague Paul Samuelson, who was often cast as Friedman’s opponent in such jousts, written and oral, once remarked that he often felt that he had won every argument and lost the debate. As for relentlessness: Professor Friedman came to my department to give a talk to graduate students in economics. The custom was that, after the seminar, the speaker and a small group of students would have dinner together, and continue discussion. On one such occasion I went along for the dinner. The conversation was lively and predictable. I had a long drive home, so at about ten o’clock I excused myself and left. Next morning I saw one of the students and asked how the rest of the dinner had gone. “Well,” he replied, “Professor Friedman kept arguing and arguing, and after a while I heard myself agreeing to things I knew weren’t true.” I suspect that was not the only such occasion."