Karl Marx was a socialist from Germany. Karl Marx invented Marxism

national-socialism,

communism

socialism in the 19 century. He is best-known for the 1848 pamphlet The Communist Manifesto (written with Friedrich Engels), and his three-volume
Das Kapital (1867–1894), a critique of classical political economy which employs his theory of historical materialism in an analysis of capitalism, in the culmination of his life's work. Marx's ideas and their subsequent development, collectively known as Marxism, have had enormous influence.