Is Ludwig von Mises relevant to economists?

. . . as answered on Quora. . . .

He was relevant to many economists in his day, and at least two of his contributions to economics — his business cycle theory and his economic calculation argument about socialism — were well respected beyond even his circle of seminar attendees, which included Fritz Machlup, Gottfried Haberler, and F. A. Hayek. Among his admirers were Lionel Robbins.

For some reason he was never given much credit for clearly spelling out an ordinalist approach to marginal utility before big names like Hicks and Allen. I have read histories of marginal utility theory that ball up the Austrian School understanding of marginal utility, from which Mises emerged and to which he contributed. So the whole approach is definitely not well understood outside the actual Misesian readership.

Several economists of high fame, today — Nobel Laureates James Buchanan and Vernon Smith, prominent among them — wrote about and praised Mises’ contributions.

Mises engaged in a kind of formal theory that deprecated mathematical exposition, so his method ran counter to much of Anglo-American economics from World War II onward, and (rightly or wrongly) he would have regarded the bulk of the statistical work of contemporary economics as “history.” That being said, there is a whole school devoted to his general approach, and only ideologues of state-worship and scientism dismiss him out of anything other than ignorance. Still, let us be frank, most economists have never heard of him, much less studied The Theory of Money and Credit or Human Action.