Libertarians of the present day are accustomed to think of socialism as the polar opposite of the libertarian creed. But this is a grave mistake, responsible for a severe ideological disorientation of libertarians in the present world. As we have seen, conservatism was the polar opposite of liberty; and socialism, while to the "left" of conservatism, was essentially a confused, middle-of-the-road movement. It was, and still is, middle-of-the-road because it tries to achieve liberal
ends by the use of conservative
means…. Socialism, like liberalism and against conservatism, accepted the industrial system and the liberal
goals of freedom, reason, mobility, progress, higher living standards for the masses, and an end to theocracy and war; but it tried to achieve these ends by the use of incompatible, conservative means: statism, central planning, communitarianism, etc.
Rothbard's "Left and Right": Forty Years Later - Roderick T. Long - Mises Daily