André Gorz, more commonly known by his pen names Gérard Horst and Michel Bosquet, was an Austrian and French social philosopher and journalist and critic of work. He co-founded Le Nouvel Observateur weekly in 1964. A supporter of Jean-Paul Sartre's existentialist version of Marxism after the Second World War, he became in the aftermath of the May '68 student riots more concerned with political ecology.