Ludwig Heinrich Edler von Mises (29-Sept-1881 to 10-Oct-1973) was an Austrian School economist, historian, logician, and sociologist. Mises wrote and lectured extensively on the societal contributions of classical liberalism. He is best known for his work on praxeology, a study of human choice and action. Mises emigrated from Austria to the United States in 1940. Since the mid-20th century, libertarian movements have been strongly influenced by Mises's writings. Mises' student Friedrich Hayek viewed Mises as one of the major figures in the revival of classical liberalism in the post-war era. Hayek's work "The Transmission of the Ideals of Freedom" (1951) pays high tribute to the influence of Mises in the 20th century libertarian movement.