André Gorz, pen name of Gérard Horst, born Gerhard Hirsch, also known by his pen name Michel Bosquet, was an Austrian and French social philosopher. Also a journalist, he co-founded Le Nouvel Observateur weekly in 1964. A supporter of Jean-Paul Sartre's existentialist version of Marxism after World War Two, in the aftermath of the May '68 student riots, he became more concerned with political ecology. In the 1960s and 1970s, he was a main theorist in the New Left movement. His central theme was wage labour issues such as liberation from work, just distribution of work, social alienation, and Guaranteed basic income