In this collection, four philosophers and four economists consider the Third Volume of Marx's Capital. The essays take up each of the major themes of Volume III - competition, for formation and development of the general rate of profit, the credit system and finance capital, rent, the Trinity formula and the concept of class - and consider them in the light of the two previous volumes. The authors share a focus on the concept of social form in Marx's work and on the method of his argument. The collection is intended both for specialists in Marxian theory and for students of the history of economic thought and of methodology.