Synopsis This book is a letter of response back from M. Proudhon to Karl Marx. This book talks about the following subjects.... The antitheses of use value and exchange value, constituted value of synthetic value, and applications of law of the proportionality of value. It also describes the method of the metaphysics of political economy, division of labor and machinery, competition and monopoly, property or ground rent, and strikes and combinations of workers. This book is easy to read in true text, not scanned images that can sometimes be difficult to decipher.