“Only a revolution can stop the destruction and clear the way for a new world to be built within the planetary boundaries, ensuring a good life for all.”

This manifesto is a document of the Fourth International, a revolutionary organisation founded in 1938 by Leon Trotsky and his comrades to save the legacy of the October Revolution from Stalinist disaster. Rejecting sterile dogmatism, the Fourth International has integrated the challenges of social movements and the ecological crisis into its thinking and practice.

The Fourth International is convinced that the process of ecosocialist revolution, at different territorial levels but with a planetary dimension, is more necessary than ever: it is a question of not only of putting an end to the social and democratic regressions that accompany global capitalist expansion, but also saving humanity from an ecological catastrophe without precedent in human history. These two objectives are inextricably linked.