'Marx's Communist Manifesto' is a political pamphlet written by Karl Marx and Friedrich Engels in 1848 that outlines the principles of communism and critiques the existing capitalist society. The manifesto argues that all of history is a class struggle between the proletariat (working class) and bourgeoisie (capitalist class), calling for the overthrow of capitalist systems to establish a classless society. It played a crucial role in inspiring revolutionary movements and shaping political ideologies during the 19th and early 20th centuries.