Marxist theorists

Eugen Berthold Friedrich Brecht (10 February 1898 – 14 August 1956), known professionally as Bertolt Brecht, was a German theatre practitioner, playwright, and poet. Coming of age during the Weimar Republic, he had his first successes as a playwright in Munich and moved to Berlin in 1924, where he wrote The Threepenny Opera with Kurt Weill and began a life-long collaboration with the composer Hanns Eisler. Immersed in Marxist thought during this period, he wrote didactic Lehrstücke and became a leading theoretician of epic theatre (which he later preferred to call "dialectical theatre") and the Verfremdungseffekt.
During the Nazi Germany period, Brecht fled his home country, first to Scandinavia, and during World War II to the United States, where he was surveilled by the FBI. After the war he was subpoenaed by the House Un-American Activities Committee. Returning to East Berlin after the war, he established the theatre company Berliner Ensemble with his wife and long-time collaborator, actress Helene Weigel.

Louis Pierre Althusser (UK: , US: ; French: [altysɛʁ]; 16 October 1918 – 22 October 1990) was a French Marxist philosopher who studied at the École normale supérieure in Paris, where he eventually became Professor of Philosophy.
Althusser was a long-time member and sometimes a strong critic of the French Communist Party (Parti communiste français, PCF). His arguments and theses were set against the threats that he saw attacking the theoretical foundations of Marxism. These included both the influence of empiricism on Marxist theory, and humanist and reformist socialist orientations which manifested as divisions in the European communist parties, as well as the problem of the cult of personality and of ideology. Althusser is commonly referred to as a structural Marxist, although his relationship to other schools of French structuralism is not a simple affiliation and he was critical of many aspects of structuralism. He later described himself as a social anarchist.Althusser's life was marked by periods of intense mental illness. In 1980, he killed his wife, the sociologist Hélène Rytmann, by strangling her. He was declared unfit to stand trial due to insanity and committed to a psychiatric hospital for three years. He did little further academic work, dying in 1990.

Friedrich "Fritz" Sternberg (11 June 1895 – 18 October 1963) was a German economist, sociologist, Marxist theorist, and socialist politician. Bertolt Brecht declared Sternberg to be his "first teacher."

Ludovico Geymonat (May 11, 1908 – November 29, 1991) was an Italian mathematician, philosopher and historian of science. As a philosopher, he mainly dealt with philosophy of science, epistemology and Marxist philosophy, in which he gave an original turn to dialectical materialism.

Ludwik Joachim Franciszek Krzywicki (21 August 1859 – 10 June 1941) was a Polish Marxist anthropologist, economist, and sociologist.
An early champion of sociology in Poland, he approached historical materialism from a sociological viewpoint. From 1919 to 1936, he was a professor at the University of Warsaw.

Johannes Agnoli (22 February 1925 in Valle di Cadore, Eastern Dolomites – 4 May 2003 in San Quirico di Moriano near Lucca) was an Italian Marxist political scientist, though he rejected the label Marxist, preferring instead - somewhat ironically - to call himself an Agnolist.

Daniel Bensaïd (25 March 1946 – 12 January 2010) was a philosopher and a leader of the Trotskyist movement in France. He became a leading figure in the student revolt of 1968, while studying at the University of Paris X: Nanterre.

Roger Garaudy (French: [ʁɔʒe gaʁodi]; 17 July 1913 – 13 June 2012) was a French philosopher, French resistance fighter and a communist author. He converted to Islam in 1982. In 1998, he was convicted and fined for Holocaust denial under French law for claiming that the death of six million Jews was a "myth".