This lecture delves into Marxism as an economic critique of liberalism, exploring its origins, philosophical underpinnings, and impact on historical and societal development. It contrasts the materialist conception of history with idealism and discusses the intellectual foundations and influences on Karl Marx. The lecture also examines the concepts of dialectical materialism, alienation, and class consciousness, providing a critical overview of Marxism's critique of capitalism and its envisioned transition to a classless society.