The original plan of Marx, as outlined in his preface to the first German edition of Capital, in 1867, was to divide his work into three volumes. Volume I was to contain Book I, The Process of Capitalist Production. Volume II was scheduled to comprise both Book II, The Process of Capitalist Circulation, and Book III, The Process of Capitalist Production as a Whole. The work was to close with volume III, containing Book IV, A History of Theories of Surplus-Value.

When Marx proceeded to elaborate his work for publication, he had the essential portions of all three volumes, with a few exceptions, worked out in their main analyses and conclusions, but in a very loose and unfinished form. Owing to ill health, he completed only volume I. He died on March 14, 1883, just when a third German edition of this volume was being prepared for the printer.

Frederick Engels, the intimate friend and co-operator of Marx, stepped into the place of his dead comrade and proceeded to complete the work. In the course of the elaboration of volume II it was found that it would be wholly taken up with Book II, The Process of Capitalist Circulation. Its first German edition did not appear until May, 1885, almost 18 years after the first volume.

The publication of the third volume was delayed still longer. When the second German edition of Volume II appeared, in July 1893, Engels was still working on volume III. It was not until October, 1894, that the first German edition of volume III was published, in two separate parts, containing the subject matter of what had been originally planned as Book III of volume II, and treating of The Capitalist Process of Production as a whole.

The reasons for the delay in the publication of volumes II and III, and the difficulties encountered in solving the problem of elaborating the copious notes of Marx into a finished and connected presentation of his theories, have been fully explained by Engels in his various prefaces to these two volumes. His great modesty led him to belittle his own share in this fundamental work. As a matter of fact, a large portion of the contents of Capital is as much a creation of Engels as though he had written it independently of Marx.

Engels intended to issue the contents of the manuscripts for Book IV, originally planned as volume III, in the form of a fourth volume of Capital. But on the 6th of August, 1895, less than one year after the publication of volume III, he followed his co-worker into the grave, still leaving this work incompleted.

However, some years previous to his demise, and in anticipation of such an eventuality, he had appointed Karl Kautsky, the editor of Die Neue Zeit, the scientific organ of the German Socialist Party, as his successor and familiarized him personally with the subject matter intended for volume IV of this work. The material proved to be so voluminous, that Kautsky, instead of making a fourth volume of Capital out of it, abandoned the original plan and issued his elaboration as a separate work in three volumes under the title Theories of Surplus-value.

The first English translation of the first volume of Capital was edited by Engels and published in 1886. Marx had in the meantime made some changes in the text of the second German and of the French translation, both of which appeared in 1873, and he had intended to superintend personally the edition of an English version. But the state of his health interfered with this plan. Engels utilised his notes and the text of the French edition of 1873 in the preparation of a third German edition, and this served as a basis for the first edition of the English translation.

Owing to the fact that the title page of this English translation (published by Swan Sonnenschein & Co.) did not distinctly specify that this was but volume I, it has often been mistaken for the complete work, in spite of the fact that the prefaces of Marx and Engels clearly pointed to the actual condition of the matter.

In 1890, four years after the publication of the first English edition, Engels edited the proofs for a fourth German edition of volume I and enlarged it still more after a repeated comparison with the French edition and manuscript notes of Marx. But the Swan Sonnenschein edition did not adopt this new version in its subsequent English issues.

This first American edition will be the first complete English edition of the entire Marxian theories of Capitalist Production. It will contain all three volumes of Capital in full. The present volume, I, deals with The Process of Capitalist Production in the strict meaning of the term "production." Volume II will treat of The Process of Capitalist Circulation in the strict meaning of the term "circulation." Volume III will contain the final analysis of The Process of Capitalist Production as a Whole, that is of Production and Circulation in their mutual interrelations.

The Theories of Surplus-Value, Kautsky's elaboration of the posthumous notes of Marx and Engels, will in due time be published in an English translation as a separate work.

This first American edition of volume I is based on the revised fourth German edition. The text of the English version of the Swan Sonnenschein has been compared page for page with this improved German edition, and about ten pages of new text hitherto not rendered in English are thus presented to American readers. All the footnotes have likewise been revised and brought up to date.

For all further information concerning the technical particulars of this work I refer the reader to the prefaces of Marx and Engels.

Orlando, Fla., July 18, 1906.