An American heterodox economist of the Austrian School, a natural-law libertarian, a revisionist historian, and a fiery proponent of Austrian economics. He remained a controversial personality for his belief the free market should offer even those services that are considered part of the conventional functions of a limited government. He is against taxation because he it was a form of slavery, embraced self-ownership, and backed the anarcho-capitalist system that would halt the government monopoly on force.