?The history of all hitherto existing society is the history of Class struggles. ? outlining the theory of communism by Marx and Engels, this political document explains the material conception of history and presents their theories and ideas of how in due course socialism would replace the capitalist society of the time. It discusses the relationship between the Proletarians and the bourgeoisie, the Communists and the Proletarians, and the Communists and other opposition parties. The Communist manifesto by Karl Marx and Friedrich Engels is one of the most important political documents of the world. This monumental text continues to remain influential and widely read.