"Critics argue that Hayek mixed a number of ethical and political philosophies in constructing his system, positions that do not necessarily cohere one with another and all of which have been independently criticized. … There are evident tensions as well between his earlier advocacy of planning a framework of law and his later enthusiasm for the gradual evolution of judge-made common law. Finally, Hayek's opinion that judges operating under the common law tradition are bound to draw "conclusions that follow from the existing body of rules and the particular facts of the case" has struck more than one observer as naive. If one is judging his work against the standard of whether he provided a finished political philosophy, Hayek clearly did not succeed."

“He linked the notion of a spontaneous order that forms when agents follow rules with the idea of complex systems in the 1950s. This was a critical breakthrough, for it allowed him to drop the old natural science-social science dichotomy ...”

“There are two elements of Hayek’s background that justify our considering him an Austrian economist: first, that he was raised and went to university in Vienna in the first three decades of the twentieth century, and second, that when he finally decided on economics as his field of study, he was trained within the Austrian tradition in economics.”

“Some may wish to argue that Hayek was simply born with a sort of natural pessimism or cynicism, and that this generated his long standing belief in the inherent limitations that humans face when they try to intervene in social phenomena. Perhaps. But it is also possible that this view was the product of his having come of age during the final collapse of an already broken-down empire, of having experienced the multiple forms of disaster that surrounded postwar Vienna and enveloped interwar central Europe, and of having witnessed the failures of various high-minded social experiments to achieve anything like what their exponents had promised. In bearing witness to so much tragedy Hayek was again very much a part of the larger Austrian tradition. His famed ‘‘epistemic pessimism’’ may well have been another result of that larger experience.”

“In his discussions of spontaneous orders, sometimes Hayek was simply trying to make the point that they exist; that is, he was trying to counter the claim that any beneficent social order needed to be constructed. This view was widespread when he first was writing; the mania for planning was then ubiquitous, so it was a point worth making. In later writings, Hayek sometimes did say, let’s trust to evolved orders rather than constructed ones, but then allowed that sometimes we needed to make piece-meal changes, and he gave no criteria for deciding.”

“It seems evident from his unpublished piece that his reading of the Mill-Taylor letters gave Hayek a bit of a shock. He knew, of course, from the Autobiography that Mill had an elevated opinion of Mrs. Taylor. The letters seem to have convinced Hayek that she dominated him. Hayek would doubtless have seen this as a weakness, and he might well have lost some respect for Mill as a result. It may also have provided a convenient explanation for Hayek for why a great mind like Mill might nonetheless “desert” the liberal camp. Given what has sometimes been said about the dominating personality of Hayek’s second wife, one wonders whether Hayek would later in his life have felt even more commonalities with Mill.”

“Hayek is a puzzle. Certainly he started out as one for me, now some twenty-odd years ago.”