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The Riddle of Philosophy Part 15

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The growing influence of the natural sciences is expressed in words like this. The confidence in these sciences was becoming greater. The belief became predominant that through the means and the results of the natural sciences one could obtain a world conception that is free from the unsatisfactory elements of the Hegelian one.

A picture of the total change that took place in this direction can be derived from a book that can be considered as representative of this period in the fullest sense of the word, Alexander von Humboldt's, Cosmos, Sketch of a Physical World Description. The author, who represents the pinnacle of education in the field of physical science of his time, speaks of his confidence in a world conception of natural science: My confidence is based on the splendid state 'of the natural sciences themselves, whose wealth consists no longer in the abundance of their facts but in the interconnections of the observations. The general results that impress every educated mind as interesting have wonderfully multiplied since the end of the eighteenth century. The individual facts stand less isolated by themselves; the gaps between the formations are closed. What remained for a long time obscure to the inquiring mind when seen in a narrower horizon becomes explained through the observations that have been obtained on an expedition into the most distant regions. Forms of

plants and animals, which seemed to be isolated for a long time, are now falling in line through the discovery of connecting links or through forms of transition. A general interconnection, not in a simple linear direction, but in a netlike, woven texture according to a higher development, or the stunted growth of certain organisms, is what gradually unfolds before the eye of the inquiring natural observer. . . .

The general study of nature awakens in us, as it were, organs that have long been dormant. We enter into a more intimate relation with the outer world.

In his Cosmos, Humboldt leads the description of nature only to the gateway of a world conception. He does not make the attempt to connect the wealth of the phenomena by means of general ideas of nature, but links the things and facts in a natural way to each other as can be expected from "the entirely objective turn of his mind."

Soon other thinkers emerged who were bold enough to make combinations and who tried to penetrate into the nature of things on the basis of natural science. What they intended to produce was nothing less than a radical transformation of all former philosophical world and life conceptions by means of modern science and knowledge of nature. In the most forceful way the natural science of the nineteenth century had paved the way for them. What they intended to do is radically expressed by Feuerbach: To a.s.sume G.o.d before nature is about the same as to a.s.sume the church before you have the stone out of which it is built, or to a.s.sume that the art of architecture has put the stones together to make a building before the chemical compounds that make up the stone, in short, before the natural genesis and formation of the stone.

The first half of the century produced many results of natural science that are bricks for the architecture of a new structure of world conception. It is, to be sure, correct that a building cannot be erected if there are no bricks to do it with, but it is no less true that one cannot do anything with these bricks if, independent of them, a picture of the building to be erected does not exist. Just as no structure can come into existence if one puts these bricks together at random, one upon the other and side by side, joining them with mortar as they come, so can no world conception come from the individual known truths of natural science if there is not, independent of these and of physical research, a power in the human soul to form the world conception. This fact was left out of consideration by the antagonists of an independent philosophy.

In examining the personalities who in the eighteen-fifties took part in the erection of a structure of world conception, the features of three men are particularly prominent: Ludwig Buechner (1824 99), Carl Vogt (1817 95) and Jacob Moleschott (1822 93). If one wants to characterize the fundamental feeling that inspires these three men, one need only repeat Moleschott's words: If man has investigated all properties of the materials that make an impression on his developed sense organs, he has thereby grasped the essence of things. With this accomplishment he arrives at his - that is to say, humanity's - absolute knowledge. Another knowledge does not exist for man.

All philosophy that has been so far advanced has, according to these men, yielded only knowledge without lasting meaning.

The idealistic philosophers believe, according to Buechner and those who shared his views, that they derive their knowledge from reason. Through this method, however, one cannot, as Buechner maintains, come to a meaningful structure of

conceptions. "But truth can only be gained by listening to nature and her rule," says Moleschott. At that time and during the following years, the protagonists for such a world conception, directly derived from nature, were collectively called materialists. It was emphatically declared that this materialism was an age-old world conception, concerning which enlightened spirits had long recognized how unsatisfactory it was for a higher thinker. Buechner attacked that opinion. He pointed out that: In the first place materialism, or the whole philosophical current moving in its direction, has never been disproved. It is not only the oldest form of philosophical contemplation in existence but also one that emerged anew with new energies at every revival of philosophy in the course of history.

Furthermore, the materialism of our day is no longer the same as it was formerly with Epicurus or the Encyclopedists, but an entirely different thought current or methods, which is supported by the results of the positive sciences. This is a method that is distinguished from its preceding form by the fact that it is no more like the older materialism, a system, but a simple realistic philosophical contemplation of existence that, above all, traces the uniform principle in the world of nature and of the spirit, striving to show everywhere a natural and law-determined connection of all phenomena of that world.

Goethe's att.i.tude toward Holbach, one of the most prominent materialists of the eighteenth century French Encyclopedists, ill.u.s.trates the position a spirit, who strives in a most p.r.o.nounced way for a thinking in accordance with nature and does full justice to the mode of conception of natural science, can nevertheless take toward materialism. Paul Heinrich Dietrich von Holbach (1723 1789) published his Systeme de la Nature in 1770. Goethe, who came across this book in Stra.s.sburg, in Poetry and Truth describes the repulsive

impression that he received from it.

Matter was to be there from eternity, and it was to have been in motion from eternity. Through this motion, now to the right, now to the left in all directions, it was to have produced without further difficulty all the infinite phenomena of existence. This we might even have accepted as satisfactory if the author had really constructed before our eyes the world out of his matter in motion. But he might have known as little about nature as we did, for after postulating a few general concepts, he again turns away from nature in order to transform what appears higher than nature, or what appears as a higher nature in nature, into the material, heavy nature, to be sure, in motion, but without direction and shape, and he thinks that he gained a great deal in so doing.

Goethe was deeply convinced that "theory in itself and by itself has no value except to make us believe in the connection of the phenomena." (Sprueche in Prosa, Deutsche Nationalliteratur, Goethe's Werke, Vol. 36, 2, pp. 357.) The results of natural science gained in the first half of the nineteenth century were, to be sure, as knowledge of facts, well-suited to supply a foundation to the materialists of the fifties for their world conception. Science has penetrated deeper and deeper into the connections of the material processes insofar as they can be reached by sense observation and by the form of thinking that is based on that sense observation. If one now wants to deny to oneself and to others that there is spirit active in matter, one nevertheless unconsciously reveals this spirit. For what Friedrich Theodor Vischer says in the third volume of his essay, On Old and New Things, is in a certain sense quite correct. "That the so-called matter can produce something, the function of which is spirit, is in itself the complete proof against materialism." In this sense, Buechner unconsciously disproves materialism by

attempting to prove that the spiritual processes spring from the depths of the material facts presented to sense observation.

An example that shows how the results of natural science took on forms that could be of a deeply penetrating influence on the conception of the world is given in Woehler's discovery of 1828. This scientist succeeded in producing a substance synthetically outside the living organism that had previously only been known to be formed within. This experiment seemed to supply the proof that the former belief, which a.s.sumed that certain material compounds could be formed only under the influence of a special life force contained in the organism, was incorrect. If it was possible to produce such compounds outside the living body, then one could draw the conclusion that the organism was also working only with the forces with which chemistry deals. The thought arose for the materialists that, if the living organism does not need a special life force to produce what formerly had been attributed to such a force, why should this organism then need special spiritual energies in order to produce the processes to which mental experiences are bound? Matter in all its qualities now became for the materialists what generates all things and processes from its core. From the fact that carbon, hydrogen, oxygen and nitrogen combine in an organic compound, it did not seem far to go to Buechner's statement, "The words soul, spirit, thought, feeling, will, life, do not stand for any real things but only for properties, qualifications, functions of the living substance, or results of ent.i.ties that have their basis in the material forms of existence." A divine being or the human soul were no longer called immortal by Buechner, but rather matter and energy. Moleschott expressed the same conviction with the words: Energy is not a creative G.o.d; no essence of things is detachable from the material basis. It is a quality of matter,

inseparable from it, eternally inherent in it. Carbon, hydrogen and oxygen are the powers that split the firmest rock and transform it into fluid processes in which life is generated.

Change of matter and form in the individual parts while the fundamental structure remains the same is the mystery of animal life.

The research done in the first half of the nineteenth century in natural science enabled Ludwig Buechner to express the view, "In a way similar to that in which the steam engine produces motion, the intricate organic complication of energy endowed materials in the animal body produces a sum total of certain effects, which, combined in a unity, are called spirit, soul, thought by us." And Karl Gustav Reuschle declared in his book, Philosophy and Natural Science, in Memory of David Friedrich Strauss (1874), that the results of natural science themselves implied a philosophical element. The affinities that one discovered between the natural forces were thought to lead into the mysteries of existence.

Such an important relation was found by Oersted in 1819 in Copenhagen. He saw that a magnetic needle is deflected by an electric current. Faraday discovered the corresponding phenomenon in 1831, that by moving a magnet toward a spirally twisted copper wire, electricity can be generated in the latter. Electricity and magnetism thereby were shown to be related natural phenomena. Both energies were no longer isolated facts; it was now apparent that they had a common basis in their material existence. Julius Robert Mayer penetrated deeper into the nature of matter and energy in the eighteen-forties when he became aware of the fact that there exists a definite relation that can be expressed numerically between mechanical work and heat. Out of pressure, impact and friction, etc., that is to say, out of work, heat is generated.

In the steam engine, heat is again changed into work. The quant.i.ty of heat produced by a given amount of work can be

calculated from the quant.i.ty of this work. If one changes the quant.i.ty of heat that is necessary to heat a kilogram of water by one degree centigrade into work, one can with this work lift 424 kilograms to a height of one meter. It cannot be surprising that the discovery of such facts was considered to be a vast progress away from such explanations concerning matter as Hegel had offered: "The transition from ideality to reality, from abstraction to concrete existence, in this case, from s.p.a.ce and time to the reality that appears as matter, is incomprehensible for the intellect and therefore appears to it always as something external and merely given." The significance of a remark of this kind is recognized only if thought as such can be seen as something valuable. This consideration, however, would not occur to the above- mentioned thinkers.

To discoveries such as these concerning the unity of the organic forces of nature, others were added that threw light on the problem of the composition of the world of organisms. In 1838 the botanist, Schleiden, recognized the significance of the simple cell for the plant organism. He showed that every texture of the plant, and therefore the plant itself, is made up of these "elementary organisms." Schleiden had recognized this "elementary organism" as a little drop of mucilaginous fluid surrounded by a cellular membrane. These cells are so multiplied and joined to one another that they form the structure of the plant. Soon after this, Schwann discovered the same general structure for the world of animal organisms.

Then, in 1827, the brilliant naturalist, Karl Ernst van Baer, discovered the human egg. He also described the process of the development of higher animals and of man from the egg.

In this way one had everywhere given up the attempt to look for ideas that could be considered fundamental for the things of nature. Instead, one had observed the facts that show in which way the higher, more complicated processes and

ent.i.ties of nature develop from the simpler and lower ones.

The men who were in search of an idealistic interpretation of the phenomena of the world became ever more rare. It was still the spirit of idealistic world conception that in 1837 inspired the anthropologist, Burdach, with the view that life did not have its origin in matter but rather a higher force transformed matter according to its own design. Moleschott had already said, "The force of life, as life itself, is nothing more than the result of the complicated interacting and interweaving physical and chemical forces."

The consciousness of the time tended to explain the universe through no other phenomena than those that are displayed before the eyes of men. Charles Lyell's work, Principles of Geology, which was published in 1830, brought the whole older geology to an end with this principle of explanation. Up to Lyell's epoch-making work it was believed that the evolution of the earth had taken place in abrupt revolutions.

Everything that had come into being on earth was supposed to have been destroyed repeatedly by complete catastrophes.

Over the graves of the victims new creations were supposed to have risen. In this manner, one explained the presence of the remnants of plants and animals in the various strata of the earth. Cuvier was the princ.i.p.al representative who believed in such repeated periods of creation. Lyell was convinced that it was unnecessary to a.s.sume such interruptions of the steady course of evolution of the earth. If one only presupposed sufficiently long periods of time, one could say that forces today still at work on earth caused the entire development. In Germany, Goethe and Karl von Hoff had already professed such a view. Von Hoff maintained it in his History of the Natural Changes of the Surface of the Earth, Doc.u.mented by Traditional Sources, which appeared in 1822. With great boldness of thought, enthusiasts Vogt, Buechner and Moleschott set out to explain all phenomena from material

processes as they take place before the senses of man.

The situation that arose when the physiologist, Rudolf Wagner, found himself opposed by Carl Vogt was typical of the intellectual warfare that the materialists had to wage. In 1852, in the paper, Allgemeine Zeitung, Wagner had declared himself in favor of accepting an independent soul ent.i.ty, thereby opposing the view of materialism. He said "that the soul could divide itself because the child inherited much from his father and much also from his mother." Vogt answered this statement for the first time in his Pictures from Animal Life. His position in this controversy is clearly exposed in the following: The soul, which is to be the substance, the very essence of the individuality of the individual, indivisible ent.i.ty, is to be capable of dividing itself. Theologists, be sure you catch this heretic. He has been up to now one of your people! Divided souls! If the soul can be divided in the act of conception as Mr.

Rudolf Wagner thinks, then it could also be possible that this soul could be divided in death, the portion that was burdened with sins going into purgatory, while the other part would go directly into paradise. Mr. Wagner also promises at the end of his physiological letters some excursions into the field of the physiology of the divided souls.

The controversy became intense when Wagner, at the a.s.sembly of natural scientists in Goettingen in 1854, read a paper against materialism ent.i.tled, Man's Creation and the Substance of the Soul. He meant to prove two things. In the first place, he set out to show that the results of modern physical science were not a contradiction of the biblical belief in the descent of the human race from one couple. In the second instance, he wanted to demonstrate that these results did not imply anything concerning the soul. Vogt wrote a polemical treatise, Bigoted Faith and Science (Koehlerglaube

und Wissenschaft), against Wagner in 1855, which showed him to be equipped with the full insight of the natural science of his time. At the same time, he appeared to be a sharp thinker who, without reserve, disclosed his opponents'

conclusions as illusions. Vogt's contradiction of Wagner's first statement comes to a climax in the pa.s.sage, "All investigations of history and of natural history lead to the positive proof of the origin of the human races from a plurality of roots. The doctrines of the Scripture concerning Adam and Noah, and the twice occurring descent of man from a single couple are scientifically untenable legends."

Against Wagner's doctrine of the soul, Vogt maintained that we see the psychical activities of man develop gradually as part of the development of the physical organs. From childhood to the maturity of life we observe that the spiritual activities become more perfect. With the shrinking of the senses and the brain, the "spirit" shrinks proportionally. "A development of this kind is not consistent with the a.s.sumption of an immortal soul substance that has been planted into the brain as its organ."

That the materialists, as they fought their opponents, were not merely confronted with intellectual reasons but also with emotions, becomes perfectly clear in the controversy between Vogt and Wagner. For Wagner had appealed, in a paper at Goettingen, for the moral need that could not endure the thought that "mechanical machines walking about with two arms and legs" should finally be dissolved into indifferent material substances, without leaving us the hope that the good they are doing should be rewarded and the evil punished.

Vogt's answer was, "The existence of an immortal soul is, for Mr. Wagner, not the result of investigation and thought. . . .

He needs an immortal soul in order to see it tortured and punished after the death of man."

Heinrich Czolbe (1819 73) attempted to show that there is a point of view from which the moral world order can be in agreement with the views of materialism. In his book, The Limits and Origin of Knowledge Seen in Opposition to Kant and Hegel, which appeared in 1865, he explained that every theology had its origin in a dissatisfaction with this world.

The exclusion of the supersensible, or those incomprehensible things that lead to the a.s.sumption of a second world, that is, to naturalism, is in no way forced upon us through the power of the facts of natural science - not even through philosophy that means to know everything - but in the last a.n.a.lysis through morality, namely, through that particular kind of moral behavior in man toward the world that we can call satisfaction with the natural world.

Czolbe considers the longing for a supernatural world actually a. result of an ingrat.i.tude against the natural world. The basic causes of a philosophy that looks toward a world beyond this one are, for him, moral shortcomings, sins against the spirit of the natural world order. For these sins distract us "from the striving toward the highest possible happiness of every individual" and from fulfilling the duty that follows from such a striving "against ourselves and others without regard for supernatural reward and punishment." According to Czolbe, every human being is to be filled with a "grateful acceptance of his share of earthly happiness, which may be possibly small, and with a humble acceptance of its limits and its necessary sorrow." Here we meet a rejection of a supernatural world order for moral reasons.

In Czolbe's world conception one also sees clearly what qualities made materialism so acceptable to human thinking, for there is no doubt that Buechner, Vogt and Moleschott were not philosophers to a sufficient degree to demonstrate the foundations of their views logically. Without losing their way

in heights of idealistic thoughts, in their capacity as naturalists they drew their conclusions more from sense observations. To render an account of their method by justifying it from the nature of human knowledge was no enterprise to their liking.

Czolbe, however, did undertake just that. In his New Presentation of Sensualism (1855), we find the reasons given why he considers a knowledge built on the basis of sensual perceptions valuable. Only a knowledge of this kind supplies concepts, judgments and conclusions that can be distinctly conceived and envisaged. Every conclusion that leads to something sensually inconceivable, and every indistinct concept is to be rejected. The soul element is not clearly conceivable, according to Czolbe, but the material on which the spiritual appears as a quality. He therefore attempts to reduce self-consciousness to visible material processes in the essay he published in 1856, The Genesis of Self-consciousness, an Answer to Professor Lotze. Here he a.s.sumes a circular movement of the parts of the brain. Through such a motion returning in its own track, the impression that a thing causes in the senses is made into a conscious sensation. It is strange that this physical explanation of consciousness became, at the same time, the occasion for him to abandon his materialism.

This is the point where one of the weaknesses inherent in materialism becomes apparent in him. If he had remained faithful to his principle, he would never have gone further than the facts that are accessible to the senses allow. He would speak of no other processes in the brain than those that can positively be a.s.serted through the means of natural science.

What Czolbe sets out to establish is, however, an aim in an infinite distance. Spirits like Czolbe are not satisfied with what is investigated, they hypothetically a.s.sume facts that have not as yet been investigated. Such an alleged fact is the circular motion of the parts of the brain. A complete investigation of the brain will most likely lead to the discovery of processes of a kind that do not occur anywhere else in the world. From

them, one will be able to draw the conclusion that the psychical processes conditioned by brain processes do occur only in connection with a brain. Concerning his hypothetical circular movements, Czolbe could not claim that they were limited to the brain. They could occur also outside the animal organism, but in that case, they would have to lead to psychical phenomena also in inanimate objects. Czolbe, who is so insistent on perceptual clarity, actually does not consider an animation of all nature as impossible. He asks, "Should not my view be a realization of the world soul, which Plato defended in his Timaeus? Should we not be able to find here the point where the Leibnizian idealism, which has the whole world consist of animated ent.i.ties (monads), unites with modern naturalism?"

On a larger scale the mistake that Czolbe made with circular brain motion occurred again in the brilliant thinker, Carl Christian Planck (1819 80). The writings of this man have been completely forgotten, in spite of the fact that they belong to the most interesting works of modern philosophy. Planck strives as intensely as any materialist for a world conception that is completely derived from perceptible reality. He criticizes the German idealism of Fichte, Sch.e.l.ling and Hegel for seeking the essence of things one-sidedly in the idea. "To explain things really out of themselves is to recognize them in their original conditioned state and in their finiteness."

(Compare Planck, The World Ages.) "There is only the one and truly pure nature, so that mere nature in the narrower sense of the word and spirit are opposites only within the one nature in the higher and more comprehensive sense."

Now the strange thing happens in Planck's philosophy that he declares the real, the world extending before him, to be the element that the explanation of the world has to seek. He nevertheless does not proceed with the observation of the facts in order to reach this element of the real world extending

before him, for he believes that human reason is capable of penetrating through its own power to the real. Hegel had, according to Planck, made the mistake of having reason contemplate its own being so that it saw itself again in all things. Planck, however, intended to have reason no longer withheld within its own limits, but to have it go beyond itself into the element of extension, the truly real. Planck blames Hegel because Hegel had reason spin its own cobweb out of itself, whereas he, himself, is bold enough to have reason spin real objective existence. Hegel maintained that the spirit is capable of comprehending the essence of things because reason is the essence of things and because it comes into being in the human spirit. Planck declares that the essence of things is not reason, but he uses reason merely to represent this essence. A bold world construction, brilliantly conceived, but conceived far from real observation, far from real things, yet constructed in the belief that it was entirely permeated with genuine reality - such is Planck's structure of ideas. He considers the world process a living interplay of expansion and contraction. Gravity is for him the tendency of the bodies, spread in s.p.a.ce, to contract. Heat and light are the tendency of a body to bring its contracted matter into activity at a distance, and therefore the tendency of expansion.

Planck's relation toward his contemporaries is most interesting. Feuerbach said of himself, "Hegel maintains the standpoint that he wants to construct the world; my standpoint is to know the world as being; he descends, I ascend. Hegel stands man on his head; I place him on his feet, which are resting on geology." With these words the materialists could also have characterized their credo, but Planck proceeds in his method exactly like Hegel. He believes, however, that he proceeds like Feuerbach and the materialists.

The materialists, if they had interpreted his method in their own way, would have had to say to him, "From your

standpoint you attempt to construct the world. Nevertheless, you believe you proceed by recognizing the world as being; you descend, but you take this descent to be an ascent. You stand the world on its head and you are of the opinion that that head is a foot." The will toward natural, factual reality could probably not be expressed more poignantly than through the world conception of a man who wanted to produce not merely ideas but reality out of reason.

The personality of Planck appears no less interesting when he is compared with his contemporary, Max Stirner. It is significant here to consider Planck's ideas concerning the motivations of human action and community life. As the materialist proceeded from the materials and forces actually presented to the senses to arrive at their explanation of nature, so Stirner started from the real individual personality as a guide line for human behavior. Reason is only with the individual. What reason decides on as a guide line for action can therefore also have validity only for the individual. Life in community will naturally result from the natural interaction of the individual personalities. If everyone acts according to his reason, the most desirable state of affairs will come to pa.s.s through the most free cooperation of all. The natural community life comes into being as a matter of course if everyone has reason rule his own individuality since, according to the materialists, the natural view of worldly phenomena comes to pa.s.s if one has the things express their nature and if one limits the activity of reason to a mere combination and interpretation of the statements of the senses. As Planck does not explain the world by allowing things to speak for themselves, but decides by his reason what the things allegedly say, so he also does not, in regard to community life, depend on a real interaction of personalities but dreams of an a.s.sociation of peoples with a supreme judicial power serving the general welfare and ordered by

reason. Here also, then, he considers it possible that reason should master what lies beyond the personality.

The original general law of right demands necessarily its external existence in a general power of right, for it would itself not be real as a general element in an external form if it were left to the individuals themselves to execute it, as the individuals by themselves are, according to their legal positions, only representatives of their personal right, not as the general right as such.

Planck constructs the general power of right because he can realize the idea of right for himself only in this manner. Five years earlier, Max Stirner had written, "My own master and the creator of my own right - I recognize no other source of right than myself. Neither G.o.d, nor state, nor nature, nor man himself with his 'eternal human rights,' neither a divine nor a human right." It is his opinion that the real right of the individual cannot exist within a general right. It is thirst for reality that drives Stirner to take his negative att.i.tude toward an unreal general right. It is the same thirst for reality that, in turn, motivates Planck in his attempt to crystallize out of an idea a real state of right.

In reading Planck's books one feels that he was deeply disturbed by the thought of a twofold world order. He considered the belief in such an interaction of two world orders - a natural order and a purely spiritual one - as something contrary to nature and intolerable.

There have been thinkers before Planck's time, of course, who strove for a purely natural-scientific mode of conception.

Leaving aside several other more or less clear attempts in this direction, Lamarck, for instance, in 1809 outlined a picture of the genesis and development of living organisms, which, according to the state of knowledge of his time, should have

had a great deal of attraction for a contemporary world conception. He thought of the simplest organisms as having come into existence through inorganic processes under certain conditions. Once an organism is formed in this way, it develops, through adjustment to given conditions of the external world, new formations that serve its life. It grows new organs because it needs them. The organisms then are capable of transformation and thereby also of perfection. Lamarck imagines this transformation in the following way. Consider an animal that gets its food from high trees. It is therefore compelled to stretch its neck. In the course of time its neck then becomes longer under the influence of this need. A short- necked animal is transformed into the giraffe with its long neck. The animals, then, have not come into existence in their variety, but this variety has developed in the course of time under the influence of changing conditions. Lamarck is of the opinion that man is included in this evolution. Man has developed in the course of time out of related forms similar to monkeys into forms that allowed him to satisfy higher physical and spiritual needs. Lamarck in this way linked up the whole world of organisms, including man, to the realm of the inorganic.

Lamarck's attempt at an explanation of the varieties of the forms of life was met with little attention by his contemporaries. Two decades later a controversy arose in the French Academy between Geoffroy St. Hilaire and George Cuvier. Geoffroy St. Hilaire believed he recognized a common structural design in the world of animal organisms in spite of its great variety. Such a general plan was a necessary prerequisite for an explanation of their development from one another. If they had developed from one another, they must have had some fundamental common element in spite of their variety. In the lowest animal something must be recognizable that only needs perfection in order to change this lower form

in the course of time into that of a higher animal. Cuvier turned strongly against the consequences of this view. He was a cautious man who pointed out that the facts did not uphold such far-reaching conclusions. As soon as Goethe heard of this conflict, he considered it the most important event of the time.

Compared to this controversy, the interest that he took in the July Revolution, a political event that took place at the same time, appears insignificant ... . Goethe expressed himself on this point clearly enough in a conversation that he had with Soret in August, 1830. He saw clearly that the adequate conception of the organic world depended on this controversial point. In an essay Goethe supported St. Hilaire with great intensity. (Compare Goethe's writings on natural science, Vol. 36, Goethe Edition, Deutsche National Literatur.) He told Johannes von Mueller that he considered Geoffroy St. Hilaire to be moving in the same direction he himself had taken up fifty years earlier. This shows clearly what Goethe meant to do when he began, shortly after his arrival in Weimar, to take up his studies on animal and plant formations. Even then he had an explanation of the variety of living forms in mind that was more adequate to nature, but he was also a cautious man. He never maintained more than what the facts ent.i.tled him to state, and he tells in his introduction to his Metamorphosis of the Plant that the time was then in considerable confusion with respect to these facts.

The opinion prevailed, as Goethe expressed it, that it was only necessary for the monkey to stand up and to walk on his hind legs in order to become a human being.

The thinkers of natural science maintained a mode of conception that was completely different from that of the Hegelians. For the Hegelians, it was possible to remain within their ideal world. They could develop their idea of man from their idea of the monkey without being concerned with the question of how nature could manage to bring man into being

in the real world side by side with the monkey. Michelet had simply p.r.o.nounced that it was no concern of the idea to explain the specific "how" of the processes in the real world.

The thinker who forms an idealistic world conception is, in this respect, in the same position as the mathematician who only has to say through what thought operation a circle is changed into an ellipse and an ellipse into a parabola or hyperbola. A thinker, however, who strives for an explanation through facts would have to point at the actual processes through which such a transformation can come to pa.s.s. He is then forming a realistic world conception. Such a thinker will not take the position that Hegel describes: It has been a clumsy conception of the older and also of the more recent philosophy of nature to consider the development and transition of one form and realm of nature into a higher one as an external and real production that one has dated back into the darkness of the past for the sake of clarification.

It is characteristic of nature to be so external in its structure that its forms fall apart in differentiated manifestations and that these. forms exist indifferently side by side; the idea, which guides the stages in their succession, is the inner nature of these separated manifestations. Such nebulous conceptions, which are really just sensual conceptions, as, for instance, the alleged progression of plants and animals from water, and then again, the evolution of the more developed animal formations from the lower ones, and so forth, must be given up by a thoughtful contemplation. (Hegel's Werke, 1847, Vol. 7, p. 33.) In opposition to such a statement of an idealistic thinker, we hear that of the realistic Lamarck: In the primal beginning only the simplest and lowest animals and plants developed, and only lastly those of a highly complicated organization. The course of the evolution of the

earth and its organic population was quite gradual and not interrupted by violent revolutions. The simplest animals and the simplest plants that occupy the lowest stages on the scale of organisms have come into existence, and do so even today, through spontaneous generation (generatio spontanea).

There was in Germany also a man of the same conviction as Lamarck. Lorenz Oken (1779 1859) presented a natural evolution of organic beings that was based on "sensual conceptions." To quote him, "Everything organic has originated from a slimy substance (Urschleim), is merely slime formed in various ways. This original slime has come into being in the ocean in the course of the planetary evolution out of inorganic matter."

In spite of such deeply provocative turns of thought there had to be, especially with thinkers who were too cautious to leave the thread of factual knowledge, a doubt against a naturalistic mode of thinking of this kind as long as the question of the teleology of living beings had not been cleared. Even Johannes Mueller, who was a pioneer as a thinker and as a research scientist, was, because of his consideration of the idea of teleology, prompted to say: The organic bodies are distinguished from the inorganic not merely by the composition of elements that they represent, but also by the continuous activity that is at work in living organic matter, which creates also teleologically and in a reason-directed plan, by arranging the parts for the purpose of the whole. It is this that is the distinguis.h.i.+ng mark of an organism. (Johannes Mueller, Handbuch der Physiologic des Menschen, 3, 1838; Vol. 1, p. 19.) With a man like Johannes Mueller, who remained strictly within the limits of natural scientific research, and for whom the thought of purpose-conformity remained as a private

conviction in the background of his factual research work, this view was not likely to produce any particular consequences.

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