[2] Sève entered the École normale supérieure in 1945,[3] where he earned agrégation of philosophy in 1949.
[4] He became a philosophy teacher at a lycée in Brussels,[2] although he was later removed from the post due to his Marxist beliefs.
[10][11] However, Sève also focused on a scientific, rather than a purely humanist or non-humanist, basis for Marxism, something that was different from most Western European Marxist ideas of the time.
[6] In the 1980s, Sève supported the creation of the medical ethics committee Comité consultatif national d'éthique (CCNE).
His works included very specific, albeit almost unachievable, criteria that he believed should be adhered to for all Marxist biographies.
[15] In 2019, on the 30th anniversary of the fall of the Berlin Wall, Sève gave an interview in which he said that Communism is relevant today, and that Karl Marx was centuries ahead of his time.
[19] In 1970, he attended a panel discussion organised by Catherine Clément, which also included Serge Leclaire and André Green.
This strongly opposed Hans Eysenck's view that personality was a mixture of genetics and learned behaviours.
)[1][22][5] The works aimed to highlight Sève's perceived problems with various interpretations of Marxism, including Stalinism, ideological mistreatment by Luc Ferry, and theories from Louis Althusser and Gilles Deleuze that Sève believed incompatible with Marxism.