Important members of the group included Maurice Dobb, Dona Torr, A. L. Morton, Rodney Hilton, E. P. Thompson, Eric Hobsbawm, George Rudé, Christopher Hill, Dorothy Thompson, John Saville, Victor Kiernan and Raphael Samuel. While some members of the group (most notably E. P. Thompson) left the party after the Hungarian Revolution of 1956, the common points of British Marxist historiography continued in their works. They placed great emphasis on human agency, cultural experience and the subjective determination of history, while growing increasingly distant from determinist views of materialism. E. P. Thompson famously engaged Louis Althusser in The Poverty of Theory, arguing that Althusser's theory overdetermined history and left no space for historical revolt by the oppressed. Austro-Marxism Austro-Marxism was a school of Marxist thought centered in Vienna that existed from the beginning of the 20th century until the 1930s. Its most eminent proponents were Max Adler, Otto Bauer, Rudolf Hilferding and Karl Renner. It was influenced by contemporaneous intellectual trends, including the prominence of neo-Kantianism and positivism in philosophy and the emergence of marginalism in economics. The group confronted issues such as the problem of the National Question within the Austro-Hungarian Empire, the rise of the interventionist state and the changing class-structure of early 20th century capitalist societies. Orthodox Marxism Orthodox Marxism is the body of Marxist thought that emerged after the death of Karl Marx (1818–1883) and which became the official philosophy of the majority of the socialist movement as represented in the Second International until the First World War in 1914. Orthodox Marxism aims to simplify, codify and systematize Marxist method and theory by clarifying the perceived ambiguities and contradictions of classical Marxism. The philosophy of orthodox Marxism includes the understanding that material development (advances in technology in the productive forces) is the primary agent of change in the structure of society and of human social relations and that social systems and their relations (e.g. feudalism, capitalism and so on) become contradictory and inefficient as the productive forces develop, which results in some form of social revolution arising in response to the mounting contradictions. This revolutionary change is the vehicle for fundamental society-wide changes and ultimately leads to the emergence of new economic systems. In the term orthodox Marxism, the word "orthodox" refers to the methods of historical materialism and of dialectical materialism—and not the normative aspects inherent to classical Marxism, without implying dogmatic adherence to the results