The article critically discusses André Gorz's Écologie et liberté (1977) forty years after its original publication. After having isolated Gorz's interests throughout his theoretical trajectory, it focuses on his “ecological phase”. It analyzes in some detail the originality of Gorz's foundational contributions to political ecology, contextualizes his engagement with Marx and Illich and highlights his unprecedented understanding of 1973 oil shock as a double crisis concerning both the sphere of production and that of reproduction. It concludes on the way in which Gorz articulates self-management as a comprehensive political project and utopia as its communicative tool.