I must start by informing the readers of the first edition about the alterations made in the second edition. One is struck at once by the clearer arrangement of the book. Additional notes are everywhere marked as notes to the second edition. The following are the most important points with regard to the text itself: In Chapter I, Section 1, the derivation of value from an analysis of the equations by which every exchange-value is expressed has been carried out with greater scientific strictness; likewise the connexion between the substance of value and the determination of the magnitude of value by socially necessary labour-time, which was only alluded to in the first edition, is now expressly emphasised. Chapter I, Section 3 (the Form of Value), has been completely revised, a task which was made necessary by the double exposition in the first edition, if nothing else. Let me remark, in passing, that that double exposition had been occasioned by my friend, Dr. L. Kugelmann in Hanover. I was visiting him in the spring of 1867 when the first proof-sheets arrived from Hamburg, and he convinced me that most readers needed a supplementary, more didactic explanation of the form of value. The last section of the first chapter, The Fetishism of Commodities, etc., has largely been altered. Chapter III, Section 1 (The Measure of Value), has been carefully revised, because in the first edition this section had been treated negligently, the reader having been referred to the explanation already given in Zur Kritik der Politischen Oekonomie, Berlin 1859. Chapter VII, particularly Part 2 [Eng. ed., Chapter IX, Section 2], has been re-written to a great extent. It would be a waste of time to go into all the partial textual changes, which were often purely stylistic. They occur throughout the book. Nevertheless I find now, on revising the French translation appearing in Paris, that several parts of the German original stand in need of rather thorough remoulding, other parts require rather heavy stylistic editing, and still others painstaking elimination of occasional slips. But there was no time for that. For I had been informed only in the autumn of 1871, when in the midst of other urgent work, that the book was sold out and that the printing of the second edition was to begin in January of 1872. The appreciation which Das Kapital rapidly gained in wide circles of the German working class is the best reward of my labours. Herr Mayer, a Vienna manufacturer, who in economic matters represents the bourgeois point of view, in a pamphlet published during the Franco-German War aptly expounded the idea that the great capacity for theory, which used to be considered a hereditary German possession, had almost completely disappeared amongst the so-called educated classes in Germany, but that amongst its working class, on the contrary, that capacity was celebrating its revival. To the present moment Political Economy, in Germany, is a foreign science. Gustav von G lich in his Historical description of Commerce, Industry, &c.,  especially in the two first volumes published in 1830, has examined at length the historical circumstances that prevented, in Germany, the development of the capitalist mode of production, and consequently the development, in that country, of modern bourgeois society. Thus the soil whence Political Economy springs was wanting. This science had to be imported from England and France as a ready-made article; its German professors remained schoolboys. The theoretical expression of a foreign reality was turned, in their hands, into a collection of dogmas, interpreted by them in terms of the petty trading world around them, and therefore misinterpreted. The feeling of scientific impotence, a feeling not wholly to be repressed, and the uneasy consciousness of having to touch a subject in reality foreign to them, was but imperfectly concealed, either under a parade of literary and historical erudition, or by an admixture of extraneous material, borrowed from the so-called Kameral sciences, a medley of smatterings, through whose purgatory the hopeful candidate for the German bureaucracy has to pass. Since 1848 capitalist production has developed rapidly in Germany, and at the present time it is in the full bloom of speculation and swindling. But fate is still unpropitious to our professional economists. At the time when they were able to deal with Political Economy in a straightforward fashion, modern economic conditions did not actually exist in Germany. And as soon as these conditions did come into existence, they did so under circumstances that no longer allowed of their being really and impartially investigated within the bounds of the bourgeois horizon. In so far as Political Economy remains within that horizon, in so far, i.e., as the capitalist r gime is looked upon as the absolutely final form of social production, instead of as a passing historical phase of its evolution, Political Economy can remain a science only so long as the class struggle is latent or manifests itself only in isolated and sporadic phenomena. Let us take England. Its Political Economy belongs to the period in which the class struggle was as yet undeveloped. Its last great representative, Ricardo, in the end, consciously makes the antagonism of class interests, of wages and profits, of profits and rent, the starting point of his investigations, na vely taking this antagonism for a social law of Nature. But by this start the science of bourgeois economy had reached the limits beyond which it could not pass. Already in the lifetime of Ricardo, and in opposition to him, it was met by criticism, in the person of Sismondi.  The succeeding period, from 1820 to 1830, was notable in England for scientific activity in the domain of Political Economy. It was the time as well of the vulgarising and extending of Ricardo s theory, as of the contest of that theory with the old school. Splendid tournaments were held. What was done then, is little known to the Continent generally, because the polemic is for the most part scattered through articles in reviews, occasional literature and pamphlets. The unprejudiced character of this polemic although the theory of Ricardo already serves, in exceptional cases, as a weapon of attack upon bourgeois economy is explained by the circumstances of the time. On the one hand, modern industry itself was only just emerging from the age of childhood, as is shown by the fact that with the crisis of 1825 it for the first time opens the periodic cycle of its modern life. On the other hand, the class struggle between capital and labour is forced into the background, politically by the discord between the governments and the feudal aristocracy gathered around the Holy Alliance on the one hand, and the popular masses, led by the bourgeoisie, on the other; economically by the quarrel between industrial capital and aristocratic landed property a quarrel that in France was concealed by the opposition between small and large landed property, and that in England broke out openly after the Corn Laws. The literature of Political Economy in England at this time calls to mind the stormy forward movement in France after Dr. Quesnay s death, but only as a Saint Martin s summer reminds us of spring. With the year 1830 came the decisive crisis. In France and in England the bourgeoisie had conquered political power. Thenceforth, the class struggle, practically as well as theoretically, took on more and more outspoken and threatening forms. It sounded the knell of scientific bourgeois economy. It was thenceforth no longer a question, whether this theorem or that was true, but whether it was useful to capital or harmful, expedient or inexpedient, politically dangerous or not. In place of disinterested inquirers, there were hired prize fighters; in place of genuine scientific research, the bad conscience and the evil intent of apologetic. Still, even the obtrusive pamphlets with which the Anti-Corn Law League, led by the manufacturers Cobden and Bright, deluged the world, have a historic interest, if no scientific one, on account of their polemic against the landed aristocracy. But since then the Free Trade legislation, inaugurated by Sir Robert Peel, has deprived vulgar economy of this its last sting. The Continental revolution of 1848 9 also had its reaction in England. Men who still claimed some scientific standing and aspired to be something more than mere sophists and sycophants of the ruling classes, tried to harmonise the Political Economy of capital with the claims, no longer to be ignored, of the proletariat. Hence a shallow syncretism, of which John Stuart Mill is the best representative. It is a declaration of bankruptcy by bourgeois economy, an event on which the great Russian scholar and critic, N. Tschernyschewsky, has thrown the light of a master mind in his Outlines of Political Economy according to Mill. In Germany, therefore, the capitalist mode of production came to a head, after its antagonistic character had already, in France and England, shown itself in a fierce strife of classes. And meanwhile, moreover, the German proletariat had attained a much more clear class-consciousness than the German bourgeoisie. Thus, at the very moment when a bourgeois science of Political Economy seemed at last possible in Germany, it had in reality again become impossible. Under these circumstances its professors fell into two groups. The one set, prudent, practical business folk, flocked to the banner of Bastiat, the most superficial and therefore the most adequate representative of the apologetic of vulgar economy; the other, proud of the professorial dignity of their science, followed John Stuart Mill in his attempt to reconcile irreconcilables. Just as in the classical time of bourgeois economy, so also in the time of its decline, the Germans remained mere schoolboys, imitators and followers, petty retailers and hawkers in the service of the great foreign wholesale concern. The peculiar historical development of German society therefore forbids, in that country, all original work in bourgeois economy; but not the criticism of that economy. So far as such criticism represents a class, it can only represent the class whose vocation in history is the overthrow of the capitalist mode of production and the final abolition of all classes the proletariat. The learned and unlearned spokesmen of the German bourgeoisie tried at first to kill Das Kapital by silence, as they had managed to do with my earlier writings. As soon as they found that these tactics no longer fitted in with the conditions of the time, they wrote, under pretence of criticising my book, prescriptions for the tranquillisation of the bourgeois mind. But they found in the workers press see, e.g., Joseph Dietzgen s articles in the Volksstaat antagonists stronger than themselves, to whom (down to this very day) they owe a reply.  An excellent Russian translation of Das Kapital appeared in the spring of 1872. The edition of 3,000 copies is already nearly exhausted. As early as 1871, N. Sieber, Professor of Political Economy in the University of Kiev, in his work David Ricardo s Theory of Value and of Capital, referred to my theory of value, of money and of capital, as in its fundamentals a necessary sequel to the teaching of Smith and Ricardo. That which astonishes the Western European in the reading of this excellent work, is the author s consistent and firm grasp of the purely theoretical position. That the method employed in Das Kapital has been little understood, is shown by the various conceptions, contradictory one to another, that have been formed of it. Thus the Paris Revue Positiviste reproaches me in that, on the one hand, I treat economics metaphysically, and on the other hand imagine! confine myself to the mere critical analysis of actual facts, instead of writing receipts  (Comtist ones?) for the cook-shops of the future. In answer to the reproach in re metaphysics, Professor Sieber has it: M. Block Les Th oriciens du Socialisme en Allemagne. Extrait du Journal des Economistes, Juillet et Ao t 1872 makes the discovery that my method is analytic and says: Par cet ouvrage M. Marx se classe parmi les esprits analytiques les plus minents. [By this work, Mr. Marx ranks among the most eminent analytical minds.] German reviews, of course, shriek out at Hegelian sophistics. The European Messenger of St. Petersburg in an article dealing exclusively with the method of Das Kapital (May number, 1872, pp. 427 436), finds my method of inquiry severely realistic, but my method of presentation, unfortunately, German-dialectical. It says: I cannot answer the writer better than by aid of a few extracts from his own criticism, which may interest some of my readers to whom the Russian original is inaccessible. After a quotation from the preface to my Criticism of Political Economy, Berlin, 1859, pp. IV VII, where I discuss the materialistic basis of my method, the writer goes on: Whilst the writer pictures what he takes to be actually my method, in this striking and [as far as concerns my own application of it] generous way, what else is he picturing but the dialectic method? Of course the method of presentation must differ in form from that of inquiry. The latter has to appropriate the material in detail, to analyse its different forms of development, to trace out their inner connexion. Only after this work is done, can the actual movement be adequately described. If this is done successfully, if the life of the subject-matter is ideally reflected as in a mirror, then it may appear as if we had before us a mere a priori construction. My dialectic method is not only different from the Hegelian, but is its direct opposite. To Hegel, the life process of the human brain, i.e., the process of thinking, which, under the name of the Idea, he even transforms into an independent subject, is the demiurgos of the real world, and the real world is only the external, phenomenal form of the Idea. With me, on the contrary, the ideal is nothing else than the material world reflected by the human mind, and translated into forms of thought. The mystifying side of Hegelian dialectic I criticised nearly thirty years ago, at a time when it was still the fashion. But just as I was working at the first volume of Das Kapital, it was the good pleasure of the peevish, arrogant, mediocre [Epigones B chner, D hring and others] who now talk large in cultured Germany, to treat Hegel in same way as the brave Moses Mendelssohn in Lessing s time treated Spinoza, i.e., as a dead dog. I therefore openly avowed myself the pupil of that mighty thinker, and even here and there, in the chapter on the theory of value, coquetted with the modes of expression peculiar to him. The mystification which dialectic suffers in Hegel s hands, by no means prevents him from being the first to present its general form of working in a comprehensive and conscious manner. With him it is standing on its head. It must be turned right side up again, if you would discover the rational kernel within the mystical shell. In its mystified form, dialectic became the fashion in Germany, because it seemed to transfigure and to glorify the existing state of things. In its rational form it is a scandal and abomination to bourgeoisdom and its doctrinaire professors, because it includes in its comprehension and affirmative recognition of the existing state of things, at the same time also, the recognition of the negation of that state, of its inevitable breaking up; because it regards every historically developed social form as in fluid movement, and therefore takes into account its transient nature not less than its momentary existence; because it lets nothing impose upon it, and is in its essence critical and revolutionary. The contradictions inherent in the movement of capitalist society impress themselves upon the practical bourgeois most strikingly in the changes of the periodic cycle, through which modern industry runs, and whose crowning point is the universal crisis. That crisis is once again approaching, although as yet but in its preliminary stage; and by the universality of its theatre and the intensity of its action it will drum dialectics even into the heads of the mushroom-upstarts of the new, holy Prusso-German empire.
Economic Manuscripts: Capital Vol. I - 1873 Afterword