The Communist Manifesto in specific countries in the mid-nineteenth century such as France, Switzerland, Poland, and Germany, this last being "on the eve of a bourgeois revolution", and predicts that a world revolution will soon follow. It ends by declaring an alliance with the social democrats, boldly supporting other communist revolutions, and calling for united international proletarian action—Working Men of All Countries, Unite!. In spring 1847 Marx and Engels joined the League of the Just, who were quickly convinced by the duo's ideas of "critical communism". At its First Congress in 2–9 June, the League tasked Engels with drafting a "profession of faith",
The Communist Manifesto of the spectre of communism with a manifesto of the party itself". The first section of the "Manifesto", "Bourgeois and Proletarians", elucidates the materialist conception of history, that "the history of all hitherto existing society is the history of class struggles". Societies have always taken the form of an oppressed majority exploited under the yoke of an oppressive minority. In capitalism, the industrial working class, or "proletariat", engage in class struggle against the owners of the means of production, the "bourgeoisie". As before, this struggle will end in a revolution that restructures society, or the "common ruin of the contending