Concept:
This iconic sentence is the opening line of Section 1 ("Bourgeois and Proletarians") of *The Communist Manifesto*, co-authored by Karl Marx and Friedrich Engels in 1848.
Step 1: Historical Materialism.
Marx’s core philosophy is that the "economic base" (how we produce goods) determines the "superstructure" (law, politics, religion). Because different groups have different relationships to the means of production, conflict is inevitable.
Step 2: The Dialectic of Struggle.
Marx outlines that history has always been a struggle between the oppressor and the oppressed: freeman and slave, lord and serf, and now, the Bourgeoisie (owners) and the Proletariat (workers).
Step 3: Distinguishing the works.
• *The German Ideology:* Focuses on the development of the "Base/Superstructure" theory.
• *A Contribution to the Critique of Political Economy:* Focuses on economic theory.
• *The Communist Manifesto*: Is a political pamphlet designed to mobilize the working class, using bold, declarative statements like the one in the question.