Or so Peter Goodman's NYTimes article ("Reconsidering Milton Friedman") might lead you to believe.
Furthermore, it seems that the experts cited in Goodman's article believe libertarianism has been refuted by the current financial crisis. That despite Jason Lewis's convincing (to me, at least) argument this past Thursday that government involvement was a cause of said crisis (or would at least make it worse, in the long run).
But what do I know? I'm neither an historian nor an economist.