The entire history of anything, Spencer tells us, must include its appearance out of the imperceptible, and its disappearance again into the imperceptible. Be it a single object, or the whole universe, an account which begins with it in a concrete form, or leaves off with its concrete form, is incomplete. He uses a familiar instance, that of a cloud appearing when vapour drifts over a cold mountain top, and again disappearing when it emerges into warmer air. The cloud emerges from the imperceptible as heat is dissipated. It is dissolved again as heat is absorbed and the watery particles evaporate. Spencer esteems this an analogue of the appearance of the universe itself, according to the nebular hypothesis. Yet assuredly, as the cloud presupposes vapours which had previously condensed, and the vapour clouds that had previously evaporated, and as clouds dissolve in one place even at the moment that they are forming in another, so we are told of nebulæ which are in every phase of advance or of decline. To ask which was first, solid masses or nebulous haze, is much like recurring to the riddle of the hen and the egg. Still, we are told, we have but to extend our thought beyond this emergence and subsidence of sidereal systems, of continents, nations, men, to find a permanent totality made up of transient individuals in every stage of change. The physical assumption with which Spencer sets out is that the mass of the universe and its energy are fixed in quantity. All the phenomena of evolution are included in the conservation of this matter and force.
Besides the criticism which was offered above, that the mere law of the persistence of force does not initiate our series, there is a further objection. Even within the series, once it has been started, this law of the persistence of force is solely a quantitative law. When energy is transformed there is an equivalence between the new form and the old. Of the reasons for the direction evolution takes, for the permanence of that direction once it has been taken, so that the sequence of forms is a progression, the explication of a latent nature—of all this, the mere law of the persistence of force gives us no explanation whatever. The change at random from one form of manifestation to another might be a striking illustration of the law of the persistence of force, but it would be the contradiction of evolution. The very notion of evolution is that of the sequence of forms, so that something is expressed or achieved. That achievement implies more than the mere force. Or rather, it involves a quality of the force with which the language of mechanism does not reckon. It assumes the idea which gives direction to the force, an ideal quality of the force.
Unquestionably that which men sought to be rid of was the idea of purpose in nature, in the old sense of design in the mind of God, external to the material universe, of force exerted upon nature from without, so as to cause nature to conform to the design of its 'Great Original,' in Addison's high phrase. In this effort, however, the reducing of all to mere force and permutation of force, not merely explains nothing, but contradicts facts which stare us in the face. It deprives evolution of the quality which makes it evolution. To put in this incongruous quality at the beginning, because we find it necessary at the end, is, to say the least, naïve. To deny that we have put it in, to insist that in the marvellous sequence we have only an illustration of mechanism and of conservation of force, is perverse. We passed through an era in which some said that they did not believe in God; everything was accounted for by evolution. In so far as they meant that they did not believe in the God of deism and of much traditional theology, they did not stand alone in this claim. In so far as they meant by evolution mere mechanism, they explained nothing and destroyed the notion of evolution besides. In so far as they meant more than mere mechanism, they lapsed into the company of the scientific myth-makers to whom we alluded above. They attributed to their abstraction, evolution, qualities which other people found in the forms of the universe viewed as the manifestation of an immanent God. Only by so doing were they able to ascribe to evolution that which other people describe as the work of God. At this level the controversy becomes one simply about words.
Of course, the great illumination as to the meaning of evolution has come with its application to many fields besides the physical. Darwin was certainly the great inaugurator of the evolutionary movement in England. Still, Darwin's problem was strictly limited. The impression is widespread that the biological evolutionary theories were first developed, and furnished the basis for the others. Yet both Hegel and Comte, not to speak of Schelling, were far more interested in the intellectual and historical, the ethical and social aspects of the question. Both Hegel and Comte were, whether rightly or wrongly, rather contemptuous of the appeal to biology and organic life. Both had the sense that they used a great figure of speech when they spoke of society as an organism, and compared the working of institutions to biological functions. This is indeed the question. It is a question over which Spencer sets himself lightly. He passes back and forth between organic evolution and the ethical, economic, and social movements which are described by the same term, as if we were in possession of a perfectly safe analogy, or rather as if we were assured of an identical principle. Much that is already archaic in Spencer's economic and social, his historical and ethical, not to say his religious, chapters is due to the influence of this fact. Of his own mind it was true that he had come to the doctrine of evolution from the physical side. He brought to his other subjects a more or less developed method of operating with the conception. He never fully realised how new subjects would alter the method and transform the conception. Spencerian evolution is an assertion of the all-sufficiency of natural law. The authority of conscience is but the experience of law-abiding and dutiful generations flowing in our veins. The public weal has hold over us, because the happiness and misery of past ages are inherited by us.
It marked a great departure when Huxley began vigorously to dissent from these views. According to him evolutionary science has done nothing for ethics. Men become ethical only as they set themselves against the principles embodied in the evolutionary process of the world. Evolution is the struggle for existence. It is preposterous to say that man became good by succeeding in the struggle for existence. Instead of the old single movement, as in Spencer, straight from the nebula to the saint, Huxley has place for suffering. Suffering is most intense in man precisely under conditions most essential to the evolution of his nobler powers. The loss of ease or money may be gain in character. The cosmical process is not only full of pain. It is full of mercilessness and of wickedness. Good has been evolved, but so has evil. The fittest may have survived. There is no guarantee that they are the best. The continual struggle against our fellows poisons our higher life. It will hardly do to say with Huxley that the ethical struggle is the reverse of the cosmical process. Nevertheless, we have here a most interesting transformation in thought.
These ideas and principles, as is well known, were elaborated and advanced upon in a very popular book, Drummond's Ascent of Man, 1894. Even the title was a happy and suggestive one. Struggle for life is a fact, but it is not the whole fact. It is balanced by the struggle for the life of others. This latter reaches far down into the levels of what we call brute life. Its divinest reach is only the fulfilment of the real nature of humanity. It is the living with men which develops the moral in man. The prolongation of infancy in the higher species has had to do with the development of moral nature. So only that we hold a sufficiently deep view of reason, provided we see clearly that reason transforms, perfects, makes new what we inherit from the beast, we need not fear for morality, though it should universally be taught that morality came into being by the slow and gradual fashioning of brute impulse.
Benjamin Kidd in his Social Evolution, 1895, has reverted again to extreme Darwinism in morals and sociology. The law is that of unceasing struggle. Reason does not teach us to moderate the struggle. It but sharpens the conflict. All religions are præter-rational, Christianity most of all, in being the most altruistic. Kidd, not without reason, comments bitterly upon Spencer's Utopia, the passage of militarism into industrialism. The struggle in industrialism is fiercer than ever. Reason affects the animal nature of man for the worse. Clearly conscious of what he is doing, man objects to sacrificing himself for his family or tribe. Instinct might lead an ape to do that. Intelligence warns a man against it. Reason is cruel beyond anything dreamed of in the beast. That portion of the community which loves to hear the abuse of reason, rejoiced to hear this phrase. They rejoiced when they heard that religion was the only remedy, and that religion was ultra-rational, contra-rational, supernatural, in this new sense. How one comes by it, or how one can rationally justify the yielding of allegiance to it, is not clear. One must indeed have the will to believe if one believes on these terms.
These again are but examples. They convey but a superficial impression of the effort to apply the conception of evolution to the moral and religious life of man. All this has taken place, of course, in a far larger setting that of the endeavour to elaborate the evolutionary view of politics and of the state, of economics and of trade, of social life and institutions, of culture and civilisation in every aspect. This elaboration and reiteration of the doctrine of evolution sometimes wearies us. It is but the unwearied following of the main clue to the riddle of the universe which the age has given us. It is nothing more and nothing less than the endeavour to apprehend the ideal life, no longer as something held out to us, set up before us, but also as something working within us, realising itself through us and among us. To deny the affinity of this with religion would be fatuous and also futile. Temporarily, at least, and to many interests of religion, it would be fatal.