Theorien über den Mehrwert
Notions of "surplus produce" have been used in economic thought and commerce for a long time (notably by the Physiocrats), but in "Das Kapital", "Theories of Surplus Value" and the "Grundrisse" Marx gave the concept a central place in his interpretation of economic history. Nowadays the concept is mainly used in Marxian economics, political anthropology, cultural anthropology, and economic anthropology.