History of economic thought died, Engels completed the second volume of "Das Kapital" from his notes. Marx wrote his magnum opus "Das Kapital" (1867) at the British Museum's library in London. Karl Marx begins with the concept of commodities. Before capitalism, says Marx, production was based on slavery – in ancient Rome for example – then serfdom in the feudal societies of medieval Europe. The current mode of labor exchange has produced an erratic and unstable situation allowing the conditions for revolution. People buy and sell their labor as people buy and sell goods and services. People themselves have become disposable commodities. As Marx
Thomas Kuczynski of his study of compensation claims for forced labour victims of the Nazi years (""Entschädigungsansprüche für Zwangsarbeit im ‚Dritten Reich‘ auf der Basis der damals erzielten zusätzlichen Einnahmen und Gewinne""). Kuczynski concluded that the German Federal Republic should pay victims of forced labour under Nazi Germany approximately 180 Billion Deutsche Marks. Later, in his book ""Brosamen vom Herrentisch"", he increased his estimate to 228 Billion Deutsche Marks (equivalent to €116 Billion). In 2007 Kuczynski took part in the theatre project, "Karl Marx: Das Kapital - Erster Band" (""Karl Marx: Das Kapital - First volume""), a show presenting a range of