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 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 (in a dispute known as Methodenstreit). Current-day economists working in this tradition are located in many different countries, but their work is still referred to as Austrian economics.