_Cosmogony, Physics, and Chemistry._
Proceeding we come to theories respecting the mode by which the world, as it is to-day, came into being. A universal separation of matter from one element was the notion of the Ionic philosophers, but, since Kant, the conception of an original nebulous state has played a new role and according to this gravitation and heat expansion have built up the worlds, little by little and one by one. The mechanical theory of heat of our time has fixed the origin of the earlier condition of the universe with much greater precision.
In spite of all this "the universal condition of the gaseous form can only be a point of departure for serious conclusions if one can define the mechanical system of it more precisely beforehand. If not, the idea becomes not only very cloudy, but the original nebula becomes really in the progress of those conclusions denser and more impenetrable."... For the present everything remains in the vagueness and formlessness of an indefinite idea, and so with regard to the gaseous universe we have only an insubstantial conception.
The theory of Kant that all existing worlds were created from a ma.s.s of rotating vapor was the greatest advance made by astronomy since the days of Copernicus. The idea that nature had no history in time was then shaken for the first time. Up to then the worlds were fixed in bounds and conditions from their very beginning, and though the individual organisms on the separate worlds were transient, the species remained unalterable. Nature was conceived as an apparently limited movement and its motion seemed to be the repet.i.tion of the same movements perpetually. It was in this conception which is entire accord with the metaphysical mode of thought that Kant made the first breach and so scientifically that most of his grounds of proof stand good to-day. Really the theory of Kant is a mere hypothesis even to-day. The Copernican theory of the universe has no longer any weight and since the spectroscope discovered such glowing gaseous matter in s.p.a.ce all objections have been disposed of and scientific opposition to Kant"s theory has been silenced. Even Herr Duehring cannot produce his universe without the nebulous state and he takes his revenge by asking to be shown the mechanical system of this nebulous state and because this cannot be done he inflicts all sorts of contemptuous remarks upon this nebulous state. Unfortunately modern science cannot show this system and please Herr Duehring. But there are many other questions which it cannot answer. For example regarding the question why toads have no tails it can only answer so far "Because they have lost them." But if people get angry and say that this is all vague and formless, a mere fanciful idea, incapable of being made definite and a very poor notion, such views would not carry us a step further, scientifically. Such insults and exaggerations are sufficiently numerous. What is there to hinder Herr Duehring himself from discovering the mechanical system of the original nebular state?
Fortunately we are informed that the nebular hypothesis of Kant "is far from showing a fully distinct condition of the world-medium or of explaining how matter arrived at a similar state." This is really very fortunate for Kant who is to be congratulated on having been able to trace the existing celestial bodies to the nebular condition, and who yet does not allow himself to dream of the self-contained unchanged condition of matter. It is to be remarked by the way that although the nebular condition of Kant is supposed to be the original vapor-form of matter, this is to be understood merely relatively. It is to be understood on the one hand as the original vapor form of the heavenly bodies, as they are at present, and on the other hand as the earliest form of matter to which we have been able to trace our way backwards.
The fact that matter pa.s.sed through an endless series of other forms before arriving at the nebular state is not excluded from this conception but is on the other hand rather included in it.
Herr Duehring is at an advantage here. Whereas science comes to a halt at the existence of the nebulous state his quack science carries him back to that "Condition of the development of the world which cannot be called actually static in the present sense of the word but most emphatically cannot be called dynamic. The unity of matter and mechanical force which we call the world is, so to speak, a formula of pure logic, to signify the self-contained condition of matter as the point of departure of all enumerable stages of material progress."
We have obviously not yet got away from the original self-contained condition of matter. Here it is explained as consisting of mechanical force and matter, and this as a formula of pure logic, etc. As soon then as the unity of matter and mechanical force is at an end evolution proceeds.
The formula of pure logic is nothing but a lame attempt to make the Hegelian categories "an Sich and fuer Sich" of use in a philosophy of realism. In "an Sich" according to Hegel the original unity of a thing consists; in "fuer Sich" begins the differentiation and movement of the concealed elements, the active ant.i.thesis. We shall therefore depict the original condition as one in which there is a unity of matter and mechanical force and the transition to movement as the separation and ant.i.thesis of these two elements. But we have not thereby established the proof of the real existence of the fantastic original condition but only this much that it exists according to the Hegelian category "an Sich" and just as fantastically disappears according to the Hegelian category "fuer Sich."
Matter, says Duehring, implies all that is real, therefore there is no mechanical force outside of matter. Mechanical force is furthermore a condition of matter. In the original condition where no change occurred matter and its mechanical force were a unity. Afterwards when the change commenced there was a differentiation from matter. Thus we are obliged to be satisfied with these mystical phrases and with the a.s.surance that the self contained original state was neither static nor dynamic, neither in a state of rest nor of motion. We are still without information with regard to the whereabouts of mechanical force at that period and how we arrived at a condition of motion from one of rest without a push from the outside, that is without G.o.d.
Before the time of Herr Duehring materialists were wont to speak of matter and motion. He reduces motion to mechanical force as its necessary original form and so renders incomprehensible the real connection between matter and motion which was also not evident to the earlier materialists. Yet the thing is easy enough. Matter has never existed without motion, neither can it. Motion in s.p.a.ce, the mechanical motion of smaller particles to single worlds, the motion of molecules as in the case of heat, or as electric or magnetic currents, chemical a.n.a.lysis or synthesis, organic life, each single atom of the matter of the world--they all discover themselves in one or other of the forms of motion or in several of them together at any given moment. All quiescence, all rest, is only significant in relation to this or that given form of motion. A body for example may be upon the ground in mechanical quiescence, in mechanical rest. This does not prevent its partic.i.p.ation in the movements of the earth and of the whole solar system, just as little does it prevent its smallest component parts from completing the movements conditioned by the temperature or its atoms from going through a chemical process. Matter without motion is just as unthinkable as motion without matter. Motion is just as uncreatable or indestructible as matter itself, the older philosophy of Descartes proclaimed precisely that the quant.i.ty of motion in the world has been fixed from the beginning. Motion cannot be generated therefore it can only be transferred. If motion is transferred from one body to another, one may as far as it is regarded as transferring itself, as active, consider it as the original cause of motion, but so far as it is transferred, as pa.s.sive.
This active motion we call force; the pa.s.sive, expression of force. It is therefore just as clear as noon that force is just as great as its expression because the same motion fulfils itself in both.
A motionless condition of matter is therefore one of the hollowest and most absurd notions, a mere delirium. In order to arrive at it one is obliged to consider the relative absence of motion in the case of a body lying on the ground, as absolute rest, and then to transfer this idea to the entire universe. This is made easier by the reduction of motion in general to mere mechanical force. By the limitation of motion to mere mechanical force we can conceive of a force as at rest, as confined, as momentarily ineffective. If for example in the transference of motion which transference is very frequently a somewhat complicated process in the carrying out of which various intermediate steps are necessary, one may stay the actual transference at a chosen point and stop the process, as for example if one loads a gun and delays the moment when the charge shall be set at liberty by the pull of the trigger, through the firing of powder. Therefore one may conceive of matter as being loaded with force in the unprogressive static period, and this Herr Duehring appears to mean by his unity of matter and force if indeed he means anything at all. This notion is absurd, since it pictures as absolute for the entire universe a condition which is by nature only relative and to which therefore only a portion of matter can be subjected at one and the same time. Let us look at it from this point of view and we do not escape the difficulty of explaining first how the universe came to be loaded and in the second place, whose finger drew the trigger. We may revolve all we please but under the guidance of Herr Duehring we always come back over and over again to the finger of G.o.d.
From astronomy our realist philosopher pa.s.ses on to mechanics and physics and complains that the mechanical theory of heat has brought us no further in the course of a generation than the point which Robert Mayer reached by his own efforts. Moreover the whole thing is very obscure. We must "always remember that with conditions of the movement of matter statical conditions are also given and that these last are not measured in mechanical work. If we have earlier typified nature as a great workwoman, and we still hold to the statement, we must now add that the static condition, the condition of rest, does not imply any mechanical labor. We are again without the bridge from the static to the dynamic and if latent heat, so called, is up to the present a stumbling block to the theory we can recognise a lack which may be denied in the cosmic process."
This whole oracular utterance is again merely an outpouring of bad science which very clearly perceives that it has got itself into a place from which it cannot be saved by creating motion from a state of absolute freedom from motion, and is ashamed to call upon its only saviour, the Creator of heaven and earth. If in mechanics, heat included, there is no bridge to be found from statics to dynamics, from equipoise to motion, why should Herr Duehring be obliged to find a bridge from his condition of absence of motion to motion? Thus he would have the luck to escape from his dilemma.
In ordinary mechanics the bridge from statics to dynamics is--the push from the outside. If a stone of the weight of a hundred grammes be lifted ten meters high and then flung free so that it should remain hanging in a self-contained condition and in a state of rest, you would have to appeal to a public of sucking infants to declare that the existing condition of that body represents no mechanical labor and that its removal from its earlier condition has no measure in mechanical work. Any pa.s.serby would tell Herr Duehring that the stone did not come on the string by its own efforts and the first good hand book in mechanics would inform him that if he let the stone fall again, the latter in its fall does just as much mechanical work as is necessary to lift it to the height of ten meters. The very simple fact that the stone is suspended represents mechanical force in itself, since if it remain long enough, the string breaks, as soon as it, as a result of its chemical const.i.tution, is no longer strong enough to hold the stone. All mechanical phenomena, may, we must inform Herr Duehring, be reduced to just such simple fundamental forms, and the engineer is still unborn who cannot discover the bridge from statics to dynamics as long as he has sufficient initial force at his disposal.
It is quite a hard nut and bitter pill for our metaphysician that motion should find its measure in its opposite rest. It is such a glaring contradiction, and every contradiction is an absurdity in the eyes of Herr Duehring. It is nevertheless true that the hanging stone by reason of its weight and its distance from the ground represents a means of mechanical movement sufficiently easily measured in different ways, as for example through gravity direct, through glancing on an incline or through the undulation of a wave--and it is just the same with a loaded gun. The expression of motion in terms of its opposite rest presents no difficulty at all to the dialectic philosophy. The whole contradiction in its eyes is merely relative, for absolute rest, complete equipose does not exist. The movement of the particles strives towards equipose, the movement of the ma.s.s in turn destroys the equipose, so that rest and equipose where they occur are the results of arrested motion, and it is evident that this motion is capable of being measured in respect of its results, of being expressed in itself and of being restored in some form or other external to itself. But Herr Duehring would never be satisfied with such a simple explanation of the matter. Like a good metaphysician he creates a yawning gulf between motion and equipose which does not really exist and then wonders if he can find no bridge across the self-created chasm. He might just as well bestride his metaphysical Rosinante and hunt the "Ding an Sich" of Kant since it is in the last a.n.a.lysis nothing else than this which stands behind the undiscoverable bridge.
But what about the mechanical theory of heat and of latent heat which is a "stumbling block" in the path of the theory?
If one convert a pound of ice at freezing point under normal atmospheric pressure into a pound of water of the same temperature by means of heat there vanishes a quant.i.ty of heat which could heat the same pound of water from 0 centigrade to 79 centigrade, or seventy-nine pounds of water one degree centigrade. If one heat this pound of water to boiling point, that is, to one hundred degrees centigrade and change it into steam of the heat of one hundred degrees centigrade there vanishes up to the time when the last of the water is changed into steam a seven fold greater quant.i.ty of heat, capable of raising the temperature of 537.2 pounds of water one degree. This dissipated heat is called latent. It is transformed, by cooling the steam, into water again, and the water into ice, so the same ma.s.s of heat which was formerly latent, is again set free, that is, as heat capable of being felt and measured. This setting free of heat by the condensation of steam and the freezing of water is the reason that steam if it is cooled off at 100 transforms itself little by little into water, and that a ma.s.s of water at freezing point is but slowly transformed into ice. These are the facts. The question is what becomes of the heat while it is latent?
The mechanical theory of heat according to which the heat of a body at a certain temperature is dependent upon the greater or less vibration of the smallest physical parts (molecules) a vibration which can, under certain conditions, be transformed into some other form of motion, shows the whole thing completely, that the latent heat has performed work, has been expended in work. By the melting of the ice the close connection of the separate particles is broken asunder and changed into a loose relationship; by the conversion of water into steam at boiling point a condition is entered where the separate molecules exercise no noticeable influence upon each other, and under the influence of heat fly from one another in all directions. It is now evident that the separate molecules of a body in the gaseous state are endowed with much greater energy than in the fluid state, and in the fluid state than in the solid. Latent heat is therefore not dissipated, it is merely transformed and has taken on the form of molecular elasticity.
As soon as conditions are at an end under which the molecules can exercise this relative freedom with regard to each other as soon namely as the temperature falls below one hundred degrees to zero, this elasticity becomes released and the molecules come together with the same force with which they formerly flew apart, but only to appear again as heat, as exactly the same quant.i.ty of heat as was latent before. This explanation is of course a hypothesis, as is the whole mechanical theory of heat, in so far as no one has yet seen a molecule, much less a molecule in motion. Like all recent theories, this hypothesis is full of flaws but it can at least offer an explanation which does not conflict with the uncreatability and indestructibility of motion and it is able to give an account of the whereabouts of the heat in the transformation. Latent heat is therefore by no means an obstacle in the way of the mechanical theory of heat. On the contrary this theory for the first time provides a rational explanation of the subject and an obstacle arises from the fact in particular that the physicists make use of the old and ineffective expression "latent heat" to signify the heat transformed into some other shape by molecular energy.
The static conditions of the solid, liquid and gaseous states therefore represent mechanical work in so far as mechanical work is a measure of heat. Thus the solid crust of the earth, like the water of the ocean, represents in its present form a certain quant.i.ty of heat set free which implies the same quant.i.ty of mechanical force. By the pa.s.sing of the vaporous state which was the original form of the earth into the fluid state and later into a condition, for the most part solid, a certain quant.i.ty of molecular energy was set free in s.p.a.ce, the difficulty of which Herr Duehring whispers does not therefore exist. We are frequently brought to a stop in our cosmic observations by lack of knowledge, but nowhere by insuperable theoretical difficulties. The bridge from statics to dynamics is therefore the push from the outside caused by the cooling or heating occasioned by other bodies which influence certain objects in equipoise. The further we explore Herr Duehring"s philosophy, the more impossible appear all his attempts to explain rotation from absence of rotation, or to discover the bridge by which that which is purely static, self-contained, can without disturbance come to be the dynamic, in motion.
We should here be glad to get rid of the whole self-contained condition business. Herr Duehring, however, goes to chemistry and gives us three permanent natural laws established by the philosophy of realism as follows, 1. The constant amount of matter in the universe.
2. The simple chemical elements, and 3. The mechanical forces are unchangeable.
Therefore the impossibility of creating or destroying matter, the simple forms of its existence as far as they exist, and motion, these old, well known facts, inadequately expressed, that is the only positive thing which Herr Duehring is in a position to offer us as a result of his real philosophy of the inorganic world. All these things we have long known. But what we have not known is that they are permanent laws and as such natural properties of the system of things.
It is just the same thing over again as in the case of Kant. Herr Duehring takes some universally known expressions, pastes the Duehring label on them and calls them "fundamentally original results and views, system shaping thoughts, profound science."
We have not long to hesitate on this account. Whatever deficiencies the most profound science and the best contrived social theories may have, for once Herr Duehring can say precisely "The quant.i.ty of gold in the universe must always remain the same and cannot be increased or diminished any more than matter in general. But unfortunately Herr Duehring does not tell us what we may buy with this gold."
_The Organic World._
"From mechanics in rest and motion to the relation of sensation and thought there is a uniform progression of interruptions." With this a.s.surance Herr Duehring spares himself from saying anything further about the origin of life, though one might reasonably expect that a thinker who has followed the development of the world from its self-contained condition, and who is so much at home with the other heavenly bodies would be here at home also. Besides this a.s.surance is only half true in so far as it is not yet completed by means of the log line of Hegel, of which mention has been made already. In all its gradations the transition from one form of evolution to another remains a leap, a differentiating movement. So in the transition from the mechanics of the worlds to those of the smaller amounts of matter in each single world, just so also in that from the mechanics of the ma.s.s to that of the molecule--the motion which we examine particularly in physics, so-called, heat, light, electricity, magnetism, just in the same way also the transition from the physics of the molecule to the physics of the chemical atom is completed by a differentiating leap, and it is just the same with the transition from ordinary chemical action to the chemistry of alb.u.men which we call life. Within the sphere of life the changes become less frequent and less remarkable. Therefore Hegel must again correct Herr Duehring.
The idea of purpose furnishes Herr Duehring with his conception of the transition to the organic world. This is again borrowed from Hegel, who in his "logic"--teachings of the concept--mingled with teachings of teleology or of purpose, pa.s.ses over from chemistry to life.
Whichever way we look we discover Herr Duehring to be in possession of Hegelian lore which he gives forth without any embarra.s.sment as his own fundamental philosophy. It would be too long a task to find out here just how far the application of the ideas of purpose is correctly stated and applied to the organic world. The application of the Hegelian "inner purpose" at all events is evident, that is, of a purpose which is imported into nature not through a consciously acting third party, like the wisdom of Providence, but which is inherent in matter itself, which among people who are not well versed in philosophy proceeds to the unthinking supposition of a conscious and all-wise agent; the same Herr Duehring who breaks out into unmeasured moral indignation at the least tendency towards spiritism on the part of other people, tells us that "s.e.x sensations are certainly mainly directed towards the gratification which is bound up in their exercise." He tells us moreover that "poor Nature must always hold the objective world in order" and it has besides to perform acts which require more subtlety from Nature than we usually attribute to her.
But nature knows not only why she does this and that. She has not only her housemaid"s duties to perform, she has not only subtlety, which is a very pretty accomplishment, in subjective conscious thought, she has also a will, for "we must regard the additional natural desires which occur, such as feeding and propagation, not as directly but as indirectly willed." We now arrive at a consciously thinking and acting nature, and we therefore stand right at the bridge, not indeed between the static and dynamic but between pantheism and deism, or perhaps Herr Duehring is pleased to indulge himself in a little "natural-philosophical half-poetry."
Impossible. All that the realistic philosophy has to say on organic nature is limited to a war against this natural philosophical half-poesy against "Charlatanism with its wanton superficialities and pseudo-scientific mysticism, against the poetic features of Darwinism."
Darwin comes in for a share of blame chiefly because he transferred the Malthusian theory of population from political economy to natural science, because he is entangled by his notions of breeding, so that his work is a sort of unscientific half-poetic attack against design in creation, and that the whole of Darwinism, after what he has borrowed from Lamark has been deducted, is a piece of brutality aimed against humanity.
Darwin had brought home with him as the result of his scientific journeys the conclusion that species of plants and animals are not fixed but are subject to variations. In order to pursue this idea he entered upon experiments in the breeding of plants and animals. Just for this reason England has become a cla.s.sic land. The scientists of other countries, Germany, for example, have nothing to offer comparable with England in this respect. Moreover, most of the conclusions belong to the last century so that the establishment of the facts presented few difficulties. Darwin found that this artificial breeding produced differences in the species of plants and animals greater than occur among those which are universally recognised as belonging to different species. Therefore it was, up to a certain point, proved that species can change and furthermore there was established the possibility of a common ancestry for organisms which partake of the characteristics of different species.
Darwin now examined the question whether there were not in nature causes--which without the conscious intention of the breeder--might in the course of time, by means of heredity, produce changes in the living animal a.n.a.logous to those produced by scientific breeding.
These causes he found in the disproportion between the enormous number of germs made by nature and the small number of beings which actually come to maturity. But as the germ struggles for its own development there is of necessity a consequent struggle for existence, which not only shows itself directly in the wear and tear of the body, but also as a struggle for s.p.a.ce and light, as in the case of plants. And it is evident that in this fight those individuals have the best prospect of coming to maturity and reproducing themselves which possess certain qualities, perhaps insignificant, but advantageous in their fight for existence. There is a tendency towards the inheritance of these individual properties, and if they occur in several individuals of the same species towards development in the direction once taken, by virtue of the acc.u.mulated heredity, while the individuals which are not possessed of these qualities succ.u.mb more easily and little by little disappear in the struggle for existence. Thus a species naturally changes by the survival of the fittest.
Against this theory of Darwin Herr Duehring urges that the origin of the idea of the struggle for existence is, as Darwin himself confessed, based on the views of the political economist and theorist, Malthus, on the population question, and he covers it with all the abuse appropriate to the clerical Malthusian views on keeping down the population. Now it happens that Darwin never said that the cause of the struggle for existence theory was to be sought from Malthus. He only said that his theories respecting the struggle for existence are the theories of Malthus applied to the entire vegetable and animal world. How great a blunder Darwin made when he so naively accepted the teachings of Malthus without examination may be seen from the fact that there is no need to employ the spectacles of Malthus in order to detect the struggle for existence in nature,--the contradiction between the innumerable ma.s.s of germs which nature produces in such prodigality and the slight number which can manage to reach maturity, a contradiction which resolves itself into an apparently grim fight for existence. And with regard to the law of wages the Malthusian doctrines are widely advertised and Ricardo based his contentions upon them,--so the struggle for existence in nature may find a standing even without the Malthusian interpretation. Besides the organisms of nature have their law of population, the establishment of which would decide the theories of the development of species. And who gave the decisive impetus in that direction? n.o.body but Darwin.
Herr Duehring is on his guard against entering upon the positive side of this question. Instead he must again find fault with the struggle for existence. There can be no argument about a struggle for existence between plants and the genial eaters of plants "in a sufficiently accurate sense the struggle for existence only occurs within the sphere of brutality, in so far as nourishment depends upon robbery and consumption." And after he has reduced the concept struggle for existence to these narrow limits he gives his wrath free play as regards the brutality of this conception which he himself has narrowed down to a brutal conception. But this moral wrath simply reacts on Herr Duehring himself, the inventor of this sort of struggle for existence. It is not Darwin therefore who seeks among the lower animals the "conditions of the operations of nature" (as a matter of fact Darwin would have included the whole of organic nature in the struggle), but one of Herr Duehring"s bugaboos. The expression "struggle for existence" in particular excites Herr Duehring"s lofty moral scorn. That this actually exists among plants every meadow, every cornfield and every wood can show him. We need not trouble about the name, whether one call it "struggle for existence" or "lack of the conditions of existence and want of mechanical realisation," but as to how this fact operates as regards the maintenance or transformation of species. With regard to this Herr Duehring persists in a characteristically stubborn silence. We cannot trouble ourselves any more about natural selection.
But "Darwinism produces its changes and differentiations out of nothing." Darwin thoroughly understands that he is engaged with the causes which have produced changes in individuals and in the second place he is engaged with the mode in which such individual differentiations tend to mark off a race, a genus, or a species.
Darwin moreover was less occupied in discovering these causes, which up to the present are either entirely unknown or on which there is only general information, than in discovering a rational form in which to establish their reality, to embrace their permanent significance.
But Darwin ascribed too wide a reach to his discovery in this that he made it an exclusive means of variation in species and neglected the causes of individual differentiations from the general form. This mistake however is common to most people who make a step forwards.
Next, if Darwin produces his changes in individual types out of nothing and thereby excludes the wisdom of the breeder, the breeder on his part must not only display his wisdom but he must produce out of nothing real changes in plant and animal forms. But who has given the impetus to the investigation as to whence these variations and differentiations proceed? It is again no one but Darwin.
Lately the conception of natural selection has been broadened, by Haeckel, in particular, and the variation of species has been shown to be the result of actual change owing to adaptation and inheritance, whereby adaptation is considered as the source of variations and heredity as the conserving element in the process. Even this is not correct in Herr Duehring"s eyes. "Peculiar adaptation to the circ.u.mstances of life as they are offered or withheld by nature supposes impulses and facts which answer to the conception. Hence adaptation is only apparent and actual causality does not elevate itself above the lowest steps of physical, chemical and plant physiology." It is again the name which provokes Herr Duehring. But how does he deal with the matter? The question is if such changes do take place in the species of organic beings or not. And again Herr Duehring has no reply.
"If a plant in the course of its growth takes a direction by which it gets the most light the result is nothing but a combination of physical forces and chemical agents, and if we are to call it an adaptation, not metaphorically but strictly, confusion is certain to arise in the motion." This man is so exacting with other people because he is quite well acquainted with the intentions of nature and speaks of the subtlety of nature, even of its will. There is confusion, indeed, but with whom, with Haeckel or with Herr Duehring?
And the confusion is not only spiritual but logical. We have seen that Herr Duehring put forth all his efforts to make the purpose idea in nature real. "The relation of means and end does not by any means show a conscious intention." But what is adaptation without conscious intention, without any intrusion of design of which he complains so loudly, but an unconscious teleology?
If the color of tree frogs and leaf eating insects is as a rule green and that of beasts that inhabit the desert sandy-yellow, and that of polar animals white, they have certainly not come into possession of this coloring intentionally or through any kind of mental process, on the contrary the coloring can only be explained by means of the operation of physical substances and chemical agents. And yet it cannot be denied that by these colors these animals are particularly adapted to the conditions in which they are and it is certain that they are by their means rendered less visible to their enemies. Just of a similar nature are the organs by which certain plants seize and consume certain insects (the means being on their under side, suited to this purpose and adapted to this end). Now if Herr Duehring insists that the adaptation must be realised through the operation of thought, he only says that the purpose must be carried out through mental operation, must be conscious and intentional. Thus again, just as in the philosophy of realism we arrive at the Creator with a purpose, at G.o.d. Formerly this kind of declaration was called "deism" and Herr Duehring says that we had not much regard for it, but it now appears that the world has gone backwards in this respect also.
From adaptation we come to heredity and here according to Herr Duehring Darwinism is quite out. "The whole organic world, Darwin explained, came from a single germ, is, so to speak, the brood of a single being. Independent similar products of nature according to Darwin do not exist without heredity and his retrogressive philosophy must come to a full stop when the end of the thread of ancestry is reached, or the original vegetable form."
The statement that Darwin traced all existing organisms from one original germ is to put it politely a piece of pure imagination on the part of Herr Duehring. Darwin says distinctly on the last page of the Origin of Species, Sixth Edition, that he regards all living beings not as separate creations but as the descendants in a direct line from some fewer beings and Haeckel makes a distinct advance on this ascribes "an entirely distinct source for plants and another for the animal kingdom" and on and between both of them "a number of original stems each of which has developed independently from one single primary monistic form." (History of Creation page 397.) This original form of life Herr Duehring discovers solely to bring it into contempt by paralleling it with the first man according to Jewish tradition, Adam. Here, unfortunately for Herr Duehring, he does not know how this original Jew turns out, according to Smith"s a.s.syrian discoveries to have been the original Semite, and that the entire Biblical story of the Creation and the Flood has been shown to have been taken from a legendary store common to the Jews, Babylonians, Chaldeans, and a.s.syrians.
It is brought forward as a severe and irrefutable reproach to Darwin that he is at an end where the thread of descent fails him.
Unfortunately the whole of our science deserves the same reproach.
When the thread of descent fails it it is "at an end." It has not yet come to the point of creating organic beings without an ancestry, not even once has it been able to make simple protoplasm or other alb.u.minous bodily forms out of the chemical elements. It can only say therefore with any certainty regarding the origin of life, that it must have come about by a chemical process. But perhaps the philosophy of realism can give us some a.s.sistance here since it is engaged with independent organic natural products, without any descent one from another. How can these come into being? By original creation?
But up to the present not even the most audacious advocates of spontaneous generation have claimed to create in this way anything except bacteria, fungi, or other very elementary organisms, but not insects, birds, fish or mammals. If these h.o.m.ogeneous products of nature--it is understood for all this discussion that they are organic--are not related through descent, they or their ancestors, then "where the thread of descent breaks" they must have been placed in the world by a separate act of creation, and this again requires a creator, what we call "deism."
Herr Duehring further explains that "it was a piece of superficiality on the part of Darwin to make the mere fact of the s.e.x-composition of qualities the foundation for the existence of these qualities." Here we have again a piece of pure imagination on the part of our profound philosopher. On the contrary Darwin says that natural selection has to do only with the maintenance of variations and not with their origin.
This new supposition however of things which Darwin did not say serves to a.s.sist us to this deep idea of Duehring. "If a principle of individual variation had been sought in the inner scheme of creation it would have been an entirely rational idea. For it is natural to unite the idea of universal generation with that of s.e.x propagation, and to regard the so-called original creation from the higher point of view, not as absolutely antagonistic to reproduction but even as reproduction itself." And the man who could write this is not ashamed to reproach Hegel with writing jargon.
Let us call a halt to the vexatious and contradictory babble with which Herr Duehring proclaims his wrath against the advance given to science by the theory of Darwin. Neither Darwin nor his followers among the natural scientists have any idea of belittling Lamark"s tremendous services, in fact they are the very people who first restored his fame. But we are unable to ignore the fact that in the time of Lamark science was still far from supplied with competent material to enable it to answer the question of the origin of species other than in a prophetic or, as it were antic.i.p.atory, manner. In addition to the enormous amount of material in the realm of general, as well as of that of anatomical, botany and zoology, acc.u.mulated since that time, two entirely new sciences have since come into existence--the investigation of the development of plant and animal germs (embryology), and the investigation of the organic survivals in the earth"s crust which still remain. There is a distinct similarity between the steps in the development of the organic germ to mature organism, and the successive steps by which plants and animals succeed each other in the history of the world. It is just this similarity which has placed the evolution theory on its most secure foundations.