For the sake of clearness I will take first this last-mentioned form of competition, the process by which one idea drives another out of the intellectual or moral currency of a community. The competition between the idea of fixity of species and Darwin's idea of the unity of life has been already cited as an instance; and it was pointed out that, gradually and after a controversy of some forty years, the former idea almost disappeared, and in the minds at any rate of those who know, the Darwinian theory became victorious. Was it natural selection that brought about the result? To test the matter let us ask once more how natural selection operates. Its mode of operation is always simply negative. And if, in the struggle of life, it selects the courageous man rather than the coward, the temperate man rather than the intemperate, the method by which this result is reached is simple: when it comes to a conflict the courageous man kills the coward or reduces him to subjection; the intemperate man has less vitality than the temperate: he too disappears, although perhaps gradually.

Take again the group-competition so far as it is influenced by natural selection. The tribe which manifests the qualities of social solidarity is selected simply in this way, that when it comes into conflict with a tribe which has not this solidarity the latter is beaten, and is thus unable to obtain the pastures or the hunting-ground which it desires, and therefore gradually or swiftly it is exterminated or left behind in the race for life. Now, I ask, Did this process take place when Darwinism supplanted the traditional theory of the fixity of species? Surely it is clear that it is only in the rarest cases that false or inadequate ideas on such subjects have any tendency to shorten life or weaken health. Bishop Wilberforce was killed by a fall from his horse, not by the triumphant dialectic of Professor Huxley. Sir Richard Owen lived to a patriarchal old age, and did not disappear from the face of the earth because he still clung to an idea which the best intellect of his time had relinquished. There is nothing in the doctrine of the fixity of species—if you hold it—which will in the least degree tend to diminish vitality. Natural selection has practically no effect at all in exterminating those who adhere to this idea. There is no means of livelihood from which it would exclude them except indeed that it might prevent them from occupying Chairs of Biology. Apart from that I do not think it will hinder them in any of the various modes of activity in which the struggle for life is manifested.

What was it then that led to the victory of the one idea over the other? The cause was intellectual. With the experts, it was logical conviction: one set of ideas was found to fit the facts somewhat better than the other set of ideas. With men in general the intellectual change came more slowly and in a different way: they adopted or imitated the ideas of those who knew. It was therefore not natural selection at all which led to the presence and power of the one idea rather than the other in the minds of thoughtful men. One idea was deliberately accepted and the other deliberately rejected. The former was accepted on grounds of which the most general account would be, if we may use the term, to call them subjective. But natural selection is a physical, external, objective process. It is carried out without the individual's volition: he is not aiming at the end. It is simply natural law which, with many varieties of living beings before it, exterminates the unfit individuals. Thus nature in its own blind way produces a result of the same kind as that which the will of man would bring about by subjective selection.

The origin of this term 'natural selection' is overlooked when people talk glibly about 'natural selection' of ideas. Darwin used the term 'natural selection' because he thought he saw an analogy between the tendency of nature and the selective purposes of intelligent beings. It was because nature, working without intelligence, produced the same kind of result as man does by intelligent selection, that he ventured to use this term 'selection' of the process of nature. Perhaps he was hardly justified in adopting the term, as nature does not select; she only passes by. At the same time, artificial selection also includes, although it is not limited to, this negative or weeding-out process. When you select a certain plant for growth in your garden you weed out the neighbouring plants which encroach upon it, so as to give it a chance to grow and thrive. By removing its competitors, you let air and light surround the plant, and it spreads its leaves to the sun. The healthy growth which results is due to the removal of obstacles by an external power; and it is in this way—by the removal of obstacles—that natural selection works.

Intelligent or artificial selection is not restricted to this negative method of working; and its operation, positive as well as negative, was certainly well known long before Darwin's day. Starting with the familiar facts of artificial or purposive selection, Darwin showed how results similar to those aimed at and reached in this way might be brought about by the operation of certain natural laws, working without purpose or design. Purposive selection pursues its ends more directly and in general attains them far more quickly than does natural selection. A still more striking characteristic is the fact that it does not entail the waste and pain which mark the course of natural selection. Witness the records of natural selection in the vegetable and animal kingdoms, where thousands are called into fruitless being that one alone may survive and prosper. Wastefulness is the most striking feature of its method, and its path is strewn with wreckage. In all these respects the conflict of ideas belongs to the level of purposive and not of natural selection. It involves consciousness of the end, which natural selection never does; it is comparatively rapid in reaching its goal and comparatively direct in the route it takes; and the victory of an idea does not take effect through any general extermination of the individuals who cherish ideas 'unfit' for survival.

I do not deny that there may be a certain natural selection in the case of human beings; but that process is always clumsy and slow and wasteful, and the purposive intelligent selection which takes its place is one of the greatest possible gains to living beings: its presence distinguishes men from animals; its predominance distinguishes civilised men from savages; the higher the stage of civilisation, the more marked is the development of selective intelligence. And in the conflict of ideas, whether moral or intellectual, the issue is determined by a selection which is predominantly purposive, and only in the slightest degree natural.

If we return to the conflict of groups we shall see that even there purposive selection enters. How (we may ask) do those qualities of obedience, willingness to help another, and the like, arise in a community and thus enable it to win the victory over a less organised or more savage enemy? Surely it is not a sufficient answer to say that these qualities have been somehow developed, and then have contributed to the victory of the community possessing them. All through civilised life, and probably throughout a great part of savage life, there is the keenest enquiry into and perception of the qualities which will make for success. These qualities are carefully selected and positively fostered. You drill your armies—that is, you cultivate the habit of discipline and all that discipline implies—so that the victory may be gained; in other words, the quality is not produced by natural selection at all. The issue may resemble the result of natural selection, for it leads to conflict and defeat of the unfit; but the conqueror is he who has foreseen the conditions of the struggle: has deliberately equipped his forces for the fight, and been the intelligent organiser of victory.

Even in the case of competition between individuals, at least among civilised men, it is clear that natural selection is very far from being the only factor. A man trains himself for a profession. It does not just somehow come about that a number of people accidentally develop certain varieties of occupation, and that natural selection makes play with this result, cutting off the unfit and leaving only those who are fairly well adapted to their positions. Something of this sort no doubt takes place to a limited extent; but, so far as it does take place, our methods are denounced as defective and, perhaps, as old-fashioned. 'Haphazard' is a wasteful principle, and should be superseded by intelligent initiative and deliberate preparation. And this indeed is the usual process. One adapts oneself carefully and of set purpose to the conditions of one's life, instead of simply waiting for natural selection to cut one off should one happen to be unfit.

Even among animals there are certain processes which cannot be brought under natural selection. There are the first efforts, slight as they may be, towards learning by experience. There are also all those facts which Darwin classes under sexual selection, where there is a positive choosing, due no doubt not to intelligent purpose but nevertheless to a subjective impulse. This marks the beginning of the end of the reign of natural selection, because in it for the purely objective or external factor there is substituted an internal, subjective factor; instead of the process of cutting off unsuitable individuals among chance varieties there appears the process of selecting that variety which pleases or attracts.

The result of this whole investigation is that natural selection cannot be properly applied so as to explain the conflict of moral ideas. It is not able to account for all the phenomena of the competition between groups. Even in sub-human life there are indications of the processes which supersede natural selection. From this result the ethical consequence may be drawn, that there is no good ground for taking the lower, the less developed, method of selection as our guide in preference to the higher and more developed. Surely we are not to take natural selection as the sole factor of ethical import because we see it at the crude beginnings of life on this earth, while the process of life itself in its higher ranges passes beyond natural selection. The physiological interpretation of life and conduct put forward by Nietzsche, and by a good many biological philosophers, would take natural selection, and its bearing upon the animal nature of man, as the sole test of efficiency and ethical value. But this interpretation of man's life disregards the achievements of evolution itself for the sake of pinning its faith to the humble beginnings of the organic process.