In The Communist Manifesto (Manifest of the Communist Party), what does Marx say about the role the state should play in society ??

In the many years since the document was originally published the terms Communism and proletariat have become so inseparable welded together that to a modern reader the constant insistence that Communist thought champions the proletariat seems bizarrely emphasized. In 1848, however, Communism was a new and largely unknown philosophy being espoused by a small and actually secret organization known as the Communist League. The proletariat, or working class, had on the other hand existed since time immemorial and featured hundreds if not thousands of labor unions, democratic associations, and social clubs. Marx and Engels wanted to decisively state that Communist action furthered the cause of the working man; that Communist theory recognized the plight of the working man; and that Communist goals had in mind only the best interests of the working man. In this respect the document can be viewed as a sales pitch for Communist theory.