The Austrian School is a school of economic thought that is based on the concept of methodological individualism – that social phenomena result from the motivations and actions of individuals. It originated in the late-19th and early-20th century Vienna with the work of Carl Menger, Eugen Böhm von Bawerk, Friedrich von Wieser, and others. It was methodologically opposed to the Prussian Historical School (a dispute known as Methodenstreit). Current-day economists working in this tradition are located in many different countries, but their work is referred to as Austrian economics.