Marcel Liebman (7 July 1929 – 1 March 1986) was a Belgian Marxist historian of political sociology and theory, active at the Université libre de Bruxelles and Vrije Universiteit Brussel.
A historian of socialism and of communism, he published a number of well known essays, notably on the Russian Revolution, Leninism, and the history of the labour movement in Belgium.
Several weeks later on 31 July, he was transported to Auschwitz with 1,555 other deportees where he was in all probability sent to the gas chambers upon arrival as he had not yet turned 16 years of age.
A foundation under the directorship Mateo Alaluf [fr] was created at the Université libre de Bruxelles upon Liebman's death in 1986.
It aims to contribute to socialist thought and the study of the left as well as a critical reflection on the practices of social movements.