What did The Communist Manifesto predict about the bourgeoisie and the proletariat?

In The Communist Manifesto, Karl Marx and Friedrich Engels predicted that the bourgeoisie—the owners of the means of production—would inevitably produce its own "grave-diggers".1

While the bourgeoisie played a historical role in revolutionizing industry and modernizing society, the authors argued that it sought to monopolize these benefits by exploiting the propertyless proletariat. This exploitation creates inherent contradictions within the capitalist system, as the conditions of social existence for the workers eventually foster the material conditions necessary to resolve these contradictions.21

Consequently, the manifesto declares that the fall of the bourgeoisie and the victory of the proletariat are inevitable. This transition is expected to culminate in a revolution that abolishes private property, elevates the proletariat to the ruling class, and replaces the old class-based society with an association where the free development of each individual becomes the condition for the free development of all.13