Final answer:
Karl Marx used anthropological information to critique the capitalist system and advocate for a socialist revolution that would lead to a classless society. His theories, collectively known as Marxism, influenced the development of socialism and communism.
Step-by-step explanation:
Karl Marx was interested in anthropological information to understand and critique the capitalist system and, ultimately, to argue for its overthrow through a proletarian revolution. Marx, a German philosopher and economist, critiqued the growth of capitalism and believed that the history of any society was defined by class struggles. His work culminated in the formulation of Marxism, which proposed that the workers (proletariat) would rise against the ruling capitalist class (bourgeoisie) and establish a socialist state. In this state, the means of production would be owned publicly, aiming to create a classless society free of exploitation. His theories influenced the development of various socialist and communist movements around the world.