Hayek expressed the greatest praise for Popper. Whether this was Hayek’s ultimate view or a reflection of a deep, though subordinate, strain of perso… - Alan O. Ebenstein

Stemming from the Germanic philosophical heritage, Hayek was likely to place more emphasis on the act of knowing than on objects themselves. Hayek ultimately followed Kant in his ontological conception of reality—he thought that mind impresses order on existence.

Law, Legislation and Liberty was written and published during a different period from The Constitution of Liberty. The earlier work was a product of the late 1950s—a generally optimistic and socially cohesive time when Hayek himself was in his late fifties, at the University of Chicago. Law, Legislation and Liberty, on the other hand, was a product of the 1960s and 1970s, a far more turbulent time, as he became an old man, was somewhat intellectually isolated in Freiburg and Salzburg, and experienced depression. That the later work has a different feel from the former is hardly to be unexpected. The relationship between the two works might be considered to be something like that between Plato’s Republic, a product of his prime, and Plato’s Laws, a product of his old age.

Although Hayek would have protested being characterized as a democratic welfare statist in The Constitution of Liberty, this is what he was. While he favored less government rather than more, government at the local level rather than national level, the provision of social welfare through private charitable organizations rather than government at any level, and the private competitive provision of government services, there was much in his work that any modern, twentieth-century liberal could support.