Out of the dissolution of the Hegelian school, however, there developed still another tendency, the only one which has borne real fruit. And this tendency is essentially connected with the name of Marx (1). The separation from Hegelian philosophy was here also the result of a return to the materialist standpoint. That means it was resolved to comprehend the real world nature and history just as it presents itself to everyone who approaches it free from preconceived idealist crotchets. It was decided mercilessly to sacrifice every idealist fancy which could not be brought into harmony with the facts conceived in their own and not in a fantastic interconnection. And materialism means nothing more than this. But here the materialistic world outlook was taken really seriously for the first time and was carried through consistently at least in its basic features in all domains of knowledge concerned. Hegel was not simply put aside. On the contrary, a start was made from his revolutionary side, described above, from the dialectical method. But in its Hegelian form, this method was unusable. According to Hegel, dialectics is the self-development of the concept. The absolute concept does not only exist unknown where from eternity, it is also the actual living soul of the whole existing world. It develops into itself through all the preliminary stages which are treated at length in the Logic and which are all included in it. Then it alienates itself by changing into nature, where, unconscious of itself, disguised as a natural necessity, it goes through a new development and finally returns as man s consciousness of himself. This self-consciousness then elaborates itself again in history in the crude form until finally the absolute concept again comes to itself completely in the Hegelian philosophy. According to Hegel, therefore, the dialectical development apparent in nature and history that is, the causal interconnection of the progressive movement from the lower to the higher, which asserts itself through all zigzag movements and temporary retrogression is only a copy [Abklatsch] of the self-movement of the concept going on from eternity, no one knows where, but at all events independently of any thinking human brain. This ideological perversion had to be done away with. We again took a materialistic view of the thoughts in our heads, regarding them as images [Abbilder] of real things instead of regarding real things as images of this or that stage of the absolute concept. Thus dialectics reduced itself to the science of the general laws of motion, both of the external world and of human thought two sets of laws which are identical in substance, but differ in their expression in so far as the human mind can apply them consciously, while in nature and also up to now for the most part in human history, these laws assert themselves unconsciously, in the form of external necessity, in the midst of an endless series of seeming accidents. Thereby the dialectic of concepts itself became merely the conscious reflex of the dialectical motion of the real world and thus the dialectic of Hegel was turned over; or rather, turned off its head, on which it was standing, and placed upon its feet. And this materialist dialectic, which for years has been our best working tool and our sharpest weapon, was, remarkably enough, discovered not only by us but also, independently of us and even of Hegel, by a German worker, Joseph Dietzgen. (2) In this way, however, the revolutionary side of Hegelian philosophy was again taken up and at the same time freed from the idealist trimmings which with Hegel had prevented its consistent execution. The great basic thought that the world is not to be comprehended as a complex of readymade things, but as a complex of processes, in which the things apparently stable no less than their mind images in our heads, the concepts, go through an uninterrupted change of coming into being and passing away, in which, in spite of all seeming accidentally and of all temporary retrogression, a progressive development asserts itself in the end this great fundamental thought has, especially since the time of Hegel, so thoroughly permeated ordinary consciousness that in this generality it is now scarcely ever contradicted. But to acknowledge this fundamental thought in words and to apply it in reality in detail to each domain of investigation are two different things. If, however, investigation always proceeds from this standpoint, the demand for final solutions and eternal truths ceases once for all; one is always conscious of the necessary limitation of all acquired knowledge, of the fact that it is conditioned by the circumstances in which it was acquired. On the other hand, one no longer permits oneself to be imposed upon by the antithesis, insuperable for the still common old metaphysics, between true and false, good and bad, identical and different, necessary and accidental. One knows that these antitheses have only a relative validity; that that which is recognized now as true has also its latent false side which will later manifest itself, just as that which is now regarded as false has also its true side by virtue of which it could previously be regarded as true. One knows that what is maintained to be necessary is composed of sheer accidents and that the so-called accidental is the form behind which necessity hides itself and so on. The old method of investigation and thought which Hegel calls metaphysical , which preferred to investigate things as given, as fixed and stable, a method the relics of which still strongly haunt people s minds, had a great deal of historical justification in its day. It was necessary first to examine things before it was possible to examine processes. One had first to know what a particular thing was before one could observe the changes it was undergoing. And such was the case with natural science. The old metaphysics, which accepted things as finished objects, arose from a natural science which investigated dead and living things as finished objects. But when this investigation had progressed so far that it became possible to take the decisive step forward, that is, to pass on the systematic investigation of the changes which these things undergo in nature itself, then the last hour of the old metaphysic struck in the realm of philosophy also. And in fact, while natural science up to the end of the last century was predominantly a collecting science, a science of finished things, in our century it is essentially a systematizing science, a science of the processes, of the origin and development of these things and of the interconnection which binds all these natural processes into one great whole. Physiology, which investigates the processes occurring in plant and animal organisms; embryology, which deals with the development of individual organisms from germs to maturity; geology, which investigates the gradual formation of the Earth s surface all these are the offspring of our century. But, above all, there are three great discoveries which have enabled our knowledge of the interconnection of natural processes to advance by leaps and bounds: First, the discovery of the cell as the unit from whose multiplication and differentiation the whole plant and animal body develops. Not only is the development and growth of all higher organisms recognized to proceed according to a single general law, but the capacity of the cell to change indicates the way by which organisms can change their species and thus go through a more than individual development. Second, the transformation of energy, which has demonstrated to us that all the so-called forces operative in the first instance in inorganic nature mechanical force and its complement, so-called potential energy, heat, radiation (light, or radiant heat), electricity, magnetism, and chemical energy are different forms of manifestation of universal motion, which pass into one another in definite proportions so that in place of a certain quantity of the one which disappears, a certain quantity of another makes its appearance and thus the whole motion of nature is reduced to this incessant process of transformation from one form into another. Finally, the proof which Darwin first developed in connected form that the stock of organic products of nature environing us today, including man, is the result of a long process of evolution from a few originally unicellular germs, and that these again have arisen from protoplasm or albumen, which came into existence by chemical means. Thanks to these three great discoveries, and the other immense advances in natural science, we have now arrived at the point where we can demonstrate the interconnection between the processes in nature not only in particular spheres but also the interconnection of these particular spheres on the whole, and so can present in an approximately systematic form a comprehensive view of the interconnection in nature by means of the facts provided by an empirical science itself. To furnish this comprehensive view was formerly the task of so-called natural philosophy. It could do this only by putting in place of the real but as yet unknown interconnections ideal, fancied ones, filling in the missing facts by figments of the mind and bridging the actual gaps merely in imagination. In the course of this procedure it conceived many brilliant ideas and foreshadowed many later discoveries, but it also produced a considerable amount of nonsense, which indeed could not have been otherwise. Today, when one needs to comprehend the results of natural scientific investigation only dialetically, that is, in the sense of their own interconnection, in order to arrive at a system of nature sufficient for our time; when the dialectical character of this interconnection is forcing itself against their will even into the metaphysically-trained minds of the natural scientists, today natural philosophy is finally disposed of. Every attempt at resurrecting it would be not only superfluous but a step backwards. But what is true of nature, which is hereby recognized also as a historical process of development, is likewise true of the history of society in all its branches and of the totality of all sciences which occupy themselves with things human (and divine). Here, too, the philosophy of history, of right, of religion, etc., has consisted in the substitution of an interconnection fabricated in the mind of the philosopher for the real interconnection to be demonstrated in the events; has consisted in the comprehension of history as a whole as well as in its separate parts, as the gradual realization of ideas and naturally always only the pet ideas of the philosopher himself. According to this, history worked unconsciously but of necessity towards a certain ideal goal set in advance as, for example, in Hegel, towards the realization of his absolute idea and the unalterable trend towards this absolute idea formed the inner interconnection in the events of history. A new mysterious providence unconscious or gradually coming into consciousness was thus put in the place of the real, still unknown interconnection. Here, therefore, just as in the realm of nature, it was necessary to do away with these fabricated, artificial interconnections by the discovery of the real ones a task which ultimately amounts to the discovery of the general laws of motion which assert themselves as the ruling ones in the history of human society. In one point, however, the history of the development of society proves to be essentially different from that of nature. In nature in so far as we ignore man s reaction upon nature there are only blind, unconscious agencies acting upon one another, out of whose interplay the general law comes into operation. Nothing of all that happens whether in the innumerable apparent accidents observable upon the surface, or in the ultimate results which confirm the regularity inherent in these accidents happens as a consciously desired aim. In the history of society, on the contrary, the actors are all endowed with consciousness, are men acting with deliberation or passion, working towards definite goals; nothing happens without a conscious purpose, without an intended aim. But this distinction, important as it is for historical investigation, particularly of single epochs and events, cannot alter the fact that the course of history is governed by inner general laws. For here, also, on the whole, in spite of the consciously desired aims of all individuals, accident apparently reigns on the surface. That which is willed happens but rarely; in the majority of instances the numerous desired ends cross and conflict with one another, or these ends themselves are from the outset incapable of realization, or the means of attaining them are insufficient. thus the conflicts of innumerable individual wills and individual actions in the domain of history produce a state of affairs entirely analogous to that prevailing in the realm of unconscious nature. The ends of the actions are intended, but the results which actually follow from these actions are not intended; or when they do seem to correspond to the end intended, they ultimately have consequences quite other than those intended. Historical events thus appear on the whole to be likewise governed by chance. But where on the surface accident holds sway, there actually it is always governed by inner, hidden laws, and it is only a matter of discovering these laws. Men make their own history, whatever its outcome may be, in that each person follows his own consciously desired end, and it is precisely the resultant of these many wills operating in different directions, and of their manifold effects upon the outer world, that constitutes history. Thus it is also a question of what the many individuals desire. The will is determined by passion or deliberation. But the levers which immediately determine passion or deliberation are of very different kinds. Partly they may be external objects, partly ideal motives, ambition, enthusiasm for truth and justice , personal hatred, or even purely individual whims of all kinds. But, on the one hand, we have seen that the many individual wills active in history for the most part produce results quite other than those intended often quite the opposite; that their motives, therefore, in relation to the total result are likewise of only secondary importance. On the other hand, the further question arises: What driving forces in turn stand behind these motives? What are the historical forces which transform themselves into these motives in the brains of the actors? The old materialism never put this question to itself. Its conception of history, in so far as it has one at all, is therefore essentially pragmatic; it divides men who act in history into noble and ignoble and then finds that as a rule the noble are defrauded and the ignoble are victorious. hence, it follows for the old materialism that nothing very edifying is to be got from the study of history, and for us that in the realm of history the old materialism becomes untrue to itself because it takes the ideal driving forces which operate there as ultimate causes, instead of investigating what is behind them, what are the driving forces of these driving forces. This inconsistency does not lie in the fact that ideal driving forces are recognized, but in the investigation not being carried further back behind these into their motive causes. On the other hand, the philosophy of history, particularly as represented by Hegel, recognizes that the ostensible and also the really operating motives of men who act in history are by no means the ultimate causes of historical events; that behind these motives are other motive powers, which have to be discovered. But it does not seek these powers in history itself, it imports them rather from outside, from philosophical ideology, into history. Hegel, for example, instead of explaining the history of ancient Greece out of its own inner interconnections, simply maintains that it is nothing more than the working out of forms of beautiful individuality , the realization of a work of art as such. He says much in this connection about the old Greeks that is fine and profound, but that does not prevent us today from refusing to be put off with such an explanation, which is a mere manner of speech. When, therefore, it is a question of investigating the driving powers which consciously or unconsciously, and indeed very often unconsciously lie behind the motives of men who act in history and which constitute the real ultimate driving forces of history, then it is not a question so much of the motives of single individuals, however eminent, as of those motives which set in motion great masses, whole people, and again whole classes of the people in each people; and this, too, not merely for an instant, like the transient flaring up of a straw-fire which quickly dies down, but as a lasting action resulting in a great historical transformation. To ascertain the driving causes which here in the minds of acting masses and their leaders to so-called great men are reflected as conscious motives, clearly or unclearly, directly or in an ideological, even glorified, form is the only path which can put us on the track of the laws holding sway both in history as a whole, and at particular periods and in particular lands. Everything which sets men in motion must go through their minds; but what form it will take in the mind will depend very much upon the circumstances. The workers have by no means become reconciled to capitalist machine industry, even though they no longer simply break the machines to pieces, as they still did in 1848 on the Rhine. But while in all earlier periods the investigation of these driving causes of history was almost impossible on account of the complicated and concealed interconnections between them and their effects our present period has so far simplified these interconnections that the riddle could be solved. Since the establishment of large-scale industry that is, at least since the European peace of 1815 it has been no longer a secret to any man in England that the whole political struggle there pivoted on the claims to supremacy of two classes: the landed aristocracy and the bourgeoisie (middle class). In France, with the return of the Bourbons, the same fact was perceived, the historians of the Restoration period, from Thierry to Guisot, Mignet, and Thiers, speak of it everywhere as the key to the understanding of all French history since the Middle Ages. And since 1830, the working class, the proletariat, has been recognized in both countries as a third competitor for power. Conditions had become so simplified that one would have had to close one s eyes deliberately not to see in the light of these three great classes and in the conflict of their interests the driving force of modern history at least in the two most advanced countries. But how did these classes come into existence? If it was possible at first glance still to ascribe the origin of the great, formerly feudal landed property at least in the first instance to political causes, to taking possession by force, this could not be done in regard to the bourgeoise and the proletariat. Here, the origin and development of two great classes was seen to lie clearly and palpably in purely economic causes. And it was just as clear that in the struggle between landed property and the bourgeoisie, no less than in the struggle between the bourgeoisie and the proletariat, it was a question, first and foremost, of economic interests, to the furtherance of which political power was intended to serve merely as a means. Bourgeoisie and proletariat both arose in consequences of a transformation of the economic conditions, more precisely, of the mode of production. The transition, first from guild handicrafts to manufacture, and then from manufacture to large-scale industry, with steam and mechanical power, had caused the development of these two classes. At a certain stage, the new productive forces set in motion by the bourgeoisie in the first place the division of labor and the combination of many detail laborers [Teilarbeiter] in one general manufactory and the conditions and requirements of exchange, developed through these productive forces, became incompatible with the existing order of production handed down by history and sanctified by law that is to say, incompatible with the privileges of the guild and the numerous other personal and local privileges (which were only so many fetters to the unprivileged estates) of the feudal order to society. The productive forces represented by the bourgeoisie rebelled against the order of production represented by the feudal landlords and the guild-masters. The result is known, the feudal fetters were smashed, gradually in England, at one blow in France. In Germany, the process is not yet finished. But just as, at a definite stage of its development, manufacture came into conflict with the feudal order of production, so now large-scale industry has already come into conflict with the bourgeois order or production established in its place.Tied down by this order, by the narrow limits of the capitalist mode of production, this industry produces, on the one hand, an ever-increasingly proletarianziation of the great mass of the people, and on the other hand, an ever greater mass of unsalable products. Overproduction and mass misery, each the cause of the other that is the absurd contradiction which is its outcome, and which of necessity calls for the liberation of the productive forces by means of a change in the mode of production. In modern history at least it is, therefore, proved that all political struggles are class struggles, and all class struggles for emancipation, despite their necessarily political form for every class struggle is a political struggle turn ultimately on the question of economic emancipation. Therefore, here at least, the state the political order is the subordination, and civil society the realm of economic relations the decisive element. The traditional conception, to which Hegel, too, pays homage, saw in the state the determining element, and in civil society the element determined by it. Appearances correspond to this. As all the driving forces of the actions of any individual person must pass through his brain, and transform themselves into motives of his will in order to set him into action, so also all the needs of civil society no matter which class happens to be the ruling one must pass through the will of the state in order to secure general validity in the form of laws. That is the formal aspect of the matter the one which is self-evident. The question arises, however, what is the content of this merely formal will of the individual as well as of the state and whence is this content derived? Why is just this willed and not something else? If we enquire into this, we discover that in modern history the will of the state is, on the whole, determined by the changing needs of civil society, but the supremacy of this or that class, in the last resort, by the development of the productive forces and relations of exchange. But if even in our modern era, with its gigantic means of production and communication, the state is not an independent domain with an independent development, but one whose existence as well as development is to be explained in the last resort by the economic conditions of life of society, then this must be still more true of all earlier times when the production of the material life of man was not yet carried on with these abundant auxiliary means, and when, therefore, the necessity of such production must have exercised a still greater mastery over men. If the state even today, in the era of big industry and of railways, is on the whole only a reflection, in concentrated form, of the economic needs of the class controlling production, then this must have been much more so in an epoch when each generation of men was forced to spend a far greater part of its aggregate lifetime in satisfying material needs, and was therefore much more dependent on them than we are today. An examination of the history of earlier periods, as soon as it is seriously undertaken from this angle, most abundantly confirms this. But, of course, this cannot be gone into here. If the state and public law are determined by economic relations, so, too, of course, is private law, which indeed in essence only sanctions the existing economic relations between individuals which are normal in the given circumstances. The form in which this happens can, however, vary considerably. It is possible, as happened in England, in harmony with the whole national development, to retain in the main the forms of the old feudal laws while giving them a bourgeois content; in fact, directly reading a bourgeois meaning into the feudal name. But, also, as happened in Western continental Europe, roman law, the first world law of a commodity-producing society, with its unsurpassably fine elaboration of all the essential legal relations of simple commodity owners (of buyers and sellers, debtors and creditors, contracts, obligations, etc.) can be taken as the foundation. In which case, for the benefit of a still petty-bourgeois and semi-feudal society, it can either be reduced to the level of such a society simply through judicial practice (common law) or, with the help of allegedly enlightened, moralizing jurists it can be worked into a special code of law to correspond with such social level a code which in these circumstances will be a bad one also from the legal standpoint (for instance, Prussian Landrecht). But after a great bourgeois revolution it is, however, also possible for such a classic law code of bourgeois society as the French Code Civile to be worked out upon the basis of this same Roman Law. If, therefore, bourgeois legal rules merely express the economic life conditions of society in legal form, then they can do so well or ill according to circumstances. The state presents itself to us as the first ideological power over man. Society creates for itself an organ for the safeguarding of its common interests against internal and external attacks. This organ is the state power. Hardly come into being, this organ makes itself independent vis-a-vis society; and, indeed, the more so, the more it becomes the organ of a particular class, the more it directly enforces the supremacy of that class. The fight of the oppressed class against the ruling class becomes necessarily a political fight, a fight first of all against the political dominance of this class. The consciousness of the interconnection between this political struggle and its economic basis becomes dulled and can be lost altogether. While this is not wholly the case with the participants, it almost always happens with the historians. Of the ancient sources on the struggles within the Roman Republic, only Appian tells us clearly and distinctly what was at issue in the last resort namely, landed property. But once the state has become an independent power vis-a-vis society, it produces forthwith a further ideology. It is indeed among professional politicians, theorists of public law, and jurists of private law, that the connection with economic facts gets lost for fair. Since in each particular case, the economic facts must assume the form of juristic motives in order to receive legal sanction; and since, in so doing, consideration of course has to be given to the whole legal system already in operation, the juristic form is, in consequence, made everything and the economic content nothing. Public law and private law are treated as independent spheres, each being capable of and needing a systematic presentation by the consistent elimination of all inner contradictions. Still higher ideologies, that is, such as are still further removed from the material, economic basis, take the form of philosophy and religion. Here the interconnection between conceptions and their material conditions of existence becomes more and more complicated, more and more obscured by intermediate links. But the interconnection exists. Just as the whole Renaissance period, from the middle of the 15th century, was an essential product of the towns and, therefore, of the burghers, so also was the subsequently newly-awakened philosophy. Its content was in essence only the philosophical expression of the thoughts corresponding to the development of the small and middle burghers into a big bourgeoisie. Among last century s Englishmen and Frenchmen who in many cases were just as much political economists as philosophers, this is clearly evident; and we have proved it above in regard to the Hegelian school. We will now in addition deal only briefly with religion, since the latter stands further away from material life and seems to be most alien to it. Religion arose in very primitive times from erroneous, primitive conceptions of men about their own nature and external nature surrounding them. Every ideology, however, once it has arisen, develops in connection with the given concept-material, and develops this material further; otherwise, it would not be an ideology, that is, occupation with thoughts as with independent entities, developing independently and subject only to their own laws. In the last analysis, the material life conditions of the persons inside whose heads this thought process goes on determine the course of the process, which of necessity remains unknown to these persons, for otherwise there would be an end to all ideology. These original religious notions, therefore, which in the main are common to each group of kindred peoples, develop, after the group separates, in a manner peculiar to each people, according to the conditions of life falling to their lot. For a number of groups of peoples, and particularly for the Aryans (so-called Indo-Europeans) this process has been shown in detail by comparative mythology. The gods thus fashioned within each people were national gods, whose domain extended no farther than the national territory which they were to protect; on the other side of its boundaries, other gods held undisputed sway. They could continue to exist, in imagination, only as long as the nation existed; they fell with its fall. The Roman world empire, the economic conditions of whose origin we do not need to examine here, brought about this downfall of the old nationalities. The old national gods decayed, even those of the Romans, which also were patterned to suit only the narrow confines of the city of Rome. The need to complement the world empire by means of a world religion was clearly revealed in the attempts made to recognize all foreign gods that were the least bit respectable and provide altars for them in Rome alongside the native gods. But a new world religion is not to be made in this fashion, by imperial decree. The new world religion, Christianity, had already quietly come into being, out of a mixture of generalized Oriental, particularly Jewish, theology, and vulgarized Greek, particularly Stoic, philosophy. What it originally looked like has to be first laboriously discovered, since its official form, as it has been handed down to us, is merely that in which it became the state religion to which purpose it was adapted by the Council of Nicaea. The fact that already after 250 years it became the state religion suffices to show that it was the religion in correspondence with the conditions of the time. In the Middle Ages, in the same measure as feudalism developed, Christianity grew into the religious counterpart to it, with a corresponding feudal hierarchy. And when the burghers began to thrive, there developed, in opposition to feudal Catholicism, the Protestant heresy, which first appeared in Southern France among the Albigenses[A], at the time the cities there reached the highest point of their florescence. The Middle Ages had attached to theology all the other forms of ideology philosophy, politics, jurisprudence and made them subdivision of theology. It thereby constrained every social and political movement to take on a theological form. The sentiments of the masses were fed with religion to the exclusion of all else; it was therefore necessary to put forward their own interests in a religious guise in order to produce a great tempest. And just as the burghers from the beginning brought into being an appendage of propertyless urban plebeians, day laborers and servants of all kinds, belonging to no recognized social estate, precursors of the later proletariat, so likewise heresy soon became divided into a burgher-moderate heresy and a plebeian-revolutionary one, the latter an abomination to the burgher heretics themselves. The ineradicability of the Protestant heresy corresponded to the invincibility of the rising burghers. When these burghers had become sufficiently strengthened, their struggle against the feudal nobility, which till then had been predominantly local, began to assume national dimensions. The first great action occurred in Germany the so-called reformation. The burghers were neither powerful enough nor sufficiently developed to be able to unite under their banner the remaining rebellious estates the plebeians of the towns, the lower nobility, and the peasants on the land. At first, the nobles were defeated; the peasants rose in a revolt which formed the peak of the whole revolutionary struggle; the cities left them in the lurch, and thus the revolution succumbed to the armies of the secular princes who reaped the whole profit. Thenceforward, Germany disappears for three centuries from the ranks of countries playing an independent active part in history. But, beside the German Luther appeared the Frenchman Calvin. With true French acuity, he put the bourgeois character of the Reformation in the forefront, republicanized and democratized the Church. While the Lutheran Reformation in Germany degenerated and reduced the country to rack and ruin, the Calvinist Reformation served as a banner for the republicans in Geneva, in Holland, and in Scotland, freed Holland from Spain and from the German Empire, and provided the ideological costume for the second act of the bourgeois revolution, which was taking place in England. Here, Calvinism justified itself as the true religious disguise of the interests of the bourgeoisie of that time, and on this account did not attain full recognition when the revolution ended in 1689 in a compromise between one part of the nobility and the bourgeoisie. The English state Church was re-established; but not in its earlier form of a Catholicism which had the king for its pope, being, instead, strongly Calvinized. The old state Church had celebrated the merry Catholic Sunday and had fought against the dull Calvinist one. The new, bourgeoisified Church introduced the latter, which adorns England to this day. In France, the Calvinist minority was suppressed in 1685 and either Catholized or driven out of the country. But what was the good? Already at that time the freethinker Pierre Bayle was at the height of his activity, and in 1694 Voltaire was born. The forcible measures of Louis XIV only made it easier for the French bourgeoisie to carry through its revolution in the irreligious, exclusively political form which alone was suited to a developed bourgeoisie. Instead of Protestants, freethinkers took their seats in the national assemblies. Thereby Christianity entered into its final stage. It was incapable of doing any future service to any progressive class as the ideological garb of its aspirations. It became more and more the exclusive possession of the ruling classes; they apply it as a mere means of government, to keep the lower classes within bounds. Moreover, each of the different classes uses its own appropriate religion: the landed nobility Catholic Jesuitism, or Protestant orthodoxy; the liberal and radical bourgeoisie rationalism; and it makes little difference whether these gentlemen themselves believe in their respective religions or not. We see, therefore: religion, once formed, always contains traditional material, just as in all ideological domains tradition forms a great conservative force. But the transformations which this material undergoes spring from class relations that is to say, out of the economic relations of the people who execute these transformations. And here that is sufficient. In the above, it could only be a question of giving a general sketch of the Marxist conception of history, at most with a few illustrations, as well. The proof must be derived from history itself; and, in this regard, it may be permitted to say that is has been sufficiently furnished in other writings. This conception, however, puts an end to philosophy in the realm of history, just as the dialectical conception of nature makes all natural philosophy both unnecessary and impossible. It is no longer a question anywhere of inventing interconnections from out of our brains, but of discovering them in the facts. For philosophy, which has been expelled from nature and history, there remains only the realm of pure thought, so far as it is left: the theory of the laws of the thought process itself, logic and dialectics. Only among the working class does the German aptitude for theory remain unimpaired. Here, it cannot be exterminated. Here, there is no concern for careers,for profit-making, or for gracious patronage from above. On the contrary, the more ruthlessly and disinterestedly science proceeds the more it finds itself in harmony with the interest and aspirations of the workers. The new tendency, which recognized that the key to the understanding of the whole history of society lies in the history of the development of labor, from the outset addressed itself by preference to the working class and here found the response which it neither sought nor expected from officially recognized science. The German working-class movement is the inheritor of German classical philosophy.
Ludwig Feuerbach and the End of Classical German Philosophy - Part 4: Marx