Ludwig Heinrich Edler von Mises (29 September 1881 – 10 October 1973) was a philosopher, Austrian School economist and sociologist. Fearing a Nazi takeover of Switzerland, where he was living at the time, Mises emigrated to the United States in 1940. Mises's thought has exerted significant influence on the libertarian movement in the United States since the mid-20th Century.
Economic historian Bruce Caldwell writes that in the mid-20th century, with the ascendance of positivism and Keynesian economics, Mises came to be regarded by many as the "archetypal 'unscientific' economist." In a 1957 review of his book The Anti-Capitalistic Mentality, The Economist said of von Mises: "Professor von Mises has a splendid analytical mind and an admirable passion for liberty; but as a student of human nature he is worse than null and as a debater he is of Hyde Park standard." The Economist [That's a very amateur standard.] Conservative commentator Whittaker Chambers published a similarly negative review of that book in the National Review, stating that Mises's thesis that anti-capitalist sentiment was rooted in "envy" epitomized "know-nothing conservatism" at its "know-nothingest."
Adapted from Wikipedia