Socialism: Utopian and Scientific of thousands of copies. Throughout the decade of the 1860s, Karl Marx, close personal friend and political associate of Friedrich Engels, dedicated himself to the study of economics, culminating in the publication of the first volume of "Das Kapital" in 1867. Marx's lengthy and ponderous volume was extremely difficult for the average to penetrate, however, leading Engels to suggest to Marx in a letter of September 16, 1868 that a short popularized version of "Das Kapital" for a working class audience was urgently needed. "If it is not written, some Moses or other will come along and do it and
Theories of Surplus Value "Das Kapital" and in several letters during the following ten years, Friedrich Engels had indicated his intention to publish the manuscript of "Theories of surplus-value". However, although he succeeded in publishing the second and third volume of ‘’Das Kapital’’, he was unable to publish the "Theories" before he died in 1895. The out-of-print Progress Publishers English edition of TSV is available online: Theories of Surplus Value Theories of Surplus Value () is a draft manuscript written by Karl Marx between January 1862 and July 1863. It is mainly concerned with the West European theorizing about "Mehrwert" (added value or surplus-value)