Hayek ripped G. W. F. Hegel in The Counter-Revolution of Science’s third part for his “historicism”—the idea, in Hayek’s terminology, that history mo… - Alan O. Ebenstein

Indeed, Hayek’s later monetary work constitutes some of his most creative practical policy suggestions, though his thought in the area was, by his own admission, undeveloped.

Hayek’s view was that all the knowledge that is possible of a circumstance is a theory of the circumstance—that is, there is no such thing as pure sensation. There is, rather, a theory of sensation.

Hayek truly did get Popper his position at the London School of Economics. “I am personally anxious to get Dr. Popper to this School,” Hayek wrote Gombrich as early as 1943. Given the later prominence that Popper achieved for the school, this was one of Hayek’s most significant contributions to its reputation, as well as the decisive career move in Popper’s life.
Hayek also genuinely influenced Popper’s political philosophy. While Popper always remained to Hayek’s left, he started out much further to Hayek’s left than he wound up, and this movement was in no small part the result of Hayek’s influence. Popper was a charter member of the Mont Pelerin Society. He suggested, however, that socialists be brought into it. Hayek wrote Popper several deeply personal letters in connection with his divorce. It is likely that their personal relationship was more important to and valued by Hayek than Popper, though Popper valued highly Hayek’s friendship.