Karl Heinrich Marx (May 5, 1818-March 14, 1883) was a Prussian philosopher, political economist, author and revolutionary socialist. His ideas played a significant role in the development of social science and the socialist movement.
Marxism is a theory, and an ideology, that combines economic, social and political change resulting in a fair and equal society (i.e. communism). Formulated and pioneered by Karl Marx and Freidrich Engels, marxism focuses on a materialist interpretation of history, a dialectical view of social change, and the development and eventual collapse of capitalism.