Marx was a great German thinker, politician, philosopher, economist, revolutionary and sociologist. His major works are Das Kapital and Manifesto. The famous philosophical thought founded by Marx is historical materialism, and its greatest wish is the all-round and free development of individuals. Marx founded the great economic theory.
Personally, I think his greatest work is Das Kapital, and Marx established his principle of exposition as "critique of political economy". Marx thinks this is the "principle of political economy" and this is the "essence", and future generations can continue to study on this basis. Marx believes that the destruction of the bourgeoisie is as inevitable as the victory of the proletariat.
The Marxist theory jointly founded by him and Engels is regarded as a theoretical weapon and a guide to action to guide the working people all over the world to struggle for the great ideals of socialism and communism.