Stalin: The tactical basis of scientific socialism is the doctrine of uncompromising class struggle, for this is the best weapon the proletariat possesses. The proletarian class struggle is the weapon by means of which the proletariat will capture political power and then expropriate the bourgeoisie in order to establish socialism. Such is the tactical basis of scientific socialism as expounded in the Manifesto of Marx and Engels. https://wordsmith.social/protestation/quotes#quote9337