This volume contains the end of Marx's economic manuscripts of 1861-63 which concludes his analysis of the production process of capital, concentrating on problems of the reproduction and circulation of the aggregate social capital. The book is part of a definitive English-language edition, prepared in collabo ration with the Institute of Marxism-Leninism in Moscow, which contains all the works of Marx and Engels, whether published in their lifetimes or since. The series includes their complete correspondence and newly discovered works.