This document provides historical context on Marxism and key figures related to Marx's work such as Engels, Proudhon, Bakunin, and Fourier. It summarizes Marx and Engels' collaboration and major publications including the Communist Manifesto. It also discusses Marx's views on "Utopian Socialism" and differences between his "scientific socialism" and the ideas of other socialist thinkers of his time. Lastly, it examines various interpretations of Marx's work including traditional and non-traditional Marxism.