Answer: His key theories were a critique of capitalism and its shortcomings. Marx thought that the capitalistic system would inevitably destroy itself. The oppressed workers would become alienated and ultimately overthrow the owners to take control of the means of production themselves, ushering in a classless society.
Marx illustrated his ideas most prominently by the development of capitalism from feudalism and by the prediction of the development of communism from capitalism. According to Marx's theory of historical materialism, societies pass through six stages — primitive communism, slave society, feudalism, capitalism, socialism and finally global, stateless communism.
Step-by-step explanation: