The Communist Manifesto, originally the Manifesto of the Communist Party, is a political pamphlet written by Karl Marx and Friedrich Engels, commissioned by the Communist League and originally published in London in 1848. The text is the first and most systematic attempt by Marx and Engels to codify for widespread consumption the core historical materialist idea that, as stated in the text's opening words, "the history of all hitherto existing society is the history of class struggles", in which social classes are defined by the relationship of people to the means of production. Published against the backdrop of the Revolutions of 1848 and their subsequent repression across Europe, the Manifesto remains one of the world's most influential political documents.