The Communist Manifesto Engels in their youth—that he opposed for its violent Blanquist tendencies, and later "mature" Marxism that he supported. This latter form refers to Marx in his later life acknowledging that socialism could be achieved through peaceful means through legislative reform in democratic societies. Bernstein declared that the massive and homogeneous working-class claimed in the "Communist Manifesto" did not exist, and that contrary to claims of a proletarian majority emerging, the middle-class was growing under capitalism and not disappearing as Marx had claimed. Bernstein noted that the working-class was not homogeneous but heterogeneous, with divisions and factions within it, including socialist
Ventotene Manifesto future wars. Vayssière notes that the manifesto is widely seen as the birth of European federalism. Spinelli (1907–86), a former Communist, became a leader of the federalist movement due to his primary authorship of the Manifesto and his postwar advocacy. The manifesto called for a break with Europe's past to form a new political system through a restructuring of politics and extensive social reform. It was presented not as an ideal, but as the best option for Europe's postwar condition. The most important assessment was the assertion that This statement was in contrast with the idea, then prevailing, that unity