Rothbard was a very different character. I had some contact with Murray early on, but very little contact with him overall. That's primarily because I deliberately kept from getting involved in the Libertarian Party affairs; partly because I always thought Murray, like Rand, was a cult builder, and a dogmatist. Partly because whenever he's had the chance he's been nasty to me and my work. I don't mind that but I didn't have to mix with him. And so there is no ideological reason why I kept separate from him, really a personal reason.
The difference between me and people like Murray Rothbard is that, though I want to know what my ideal is, I think I also have to be willing to discuss changes that are less than ideal so long as they point me in that direction. So while I'd like to abolish the Fed, I've written many pages on how the Fed, if it does exist, should be run.
Murray used to berate me for my stand on education vouchers. I would like to see the government out of the education business entirely. In that area, I have become more extreme, not because of any change of philosophy, but because of a change in my knowledge of the factual situation and history.
~ Milton Friedman, "Best of Both Worlds," Reason, June 1995