Man, Economy, and State: A treatise on economic principles is a 1962 book of Austrian School economics by Murray Rothbard (orig. abridged ed.).According to Joseph T. Salerno's Introduction to the work, Rothbard's "primary mission" in writing it was "to purge modern economic science of its alien positivist and mathematical formalist elements and to reconstruct it along consistently causal-realist lines." According to Robert P. Murphy, the book had an "obvious role in the modern revival of Austrian ideas". According to Ludwig von Mises, the book "offers to every intelligent man an opportunity to obtain reliable information concerning the great controversies and conflicts of our age."According to Salerno, the book Power and Market: Government and the Economy "was originally written as the third volume of Man, Economy, and State, but was published separately eight years later". It was reunited with the 4th edition of Man, Economy, and State in 2004 in the volume sub-titled "The Scholar's Edition" from the Ludwig von Mises Institute. The author analyzes the negative effects of the various kinds of government intervention, and argues that the State is neither necessary nor useful. Source: Wikipedia (en)