Economist.
Ludwig Heinrich Edler von Mises (29 September 1881 – 10 October 1973) was a philosopher, Austrian School economist, and classical liberal. He became a prominent figure in the Austrian School of economic thought and is best known for his work on praxeology. Fearing a Nazi takeover of Switzerland, where he was living at the time, Mises emigrated to the United States in 1940. Mises had a significant influence on the libertarian movement in the United States in the mid-20th century.
Sources:
1.) "Indeed, for someone who was an agnostic, Mises wrote a great deal about religion. The number of references he makes to religion is staggering, actually numbering over twenty-five hundred in his published corpus." Laurence M. Vance, Mises Debunks the Religious Case for the State, Thursday, 10 February 2005.
2.) "Ludwig von Mises, who was agnostic, skeptical, and non-political." Block, Walter and Rockwell Jr., Llewellyn H., Man, Economy, and Liberty: Essays in Honor of Murray N. Rothbard, page 168.