Said Murray Rothbard of what the New Left had become at the end of the 1960s:
To contemplate America in the grip of the Weathermen or Women’s Lib is to envision a truly nightmare world. Not only does Dick Nixon shine in comparison; I would venture to predict that a Rudd or a Morgan reign would make even Joe Stalin seem like Albert Schweitzer. For make no mistake: the Left is now in the grip, not just of Marxists-Stalinists, but also, for the first time in the history of Marxism, it is a movement that is Marxist in ideology but totally nihilist in attitude, worldview, and lifestyle. There have been few more repellent blends in the history of social thought than the current one of the goals of Stalin blended with the attitude and tactics of the nihilist Nechayev. For at least the Marxism of Stalin’s day tried its best to be rational, to pursue the goals of science and reason; they did not pursue insanity almost for its own sake, or as a “liberating” force. If, then, we have nothing in common with either the means or the purposes of the current Left, then we must cease thinking of ourselves, in the current political and ideological context, as “Leftists”. We must bid farewell to the Left.
Murray Rothbard, “Farewell to the Left,” Libertarian Forum, May 1, 1970