What may be meant by this idea of 'fitness'—which meets us in the famous phrase that the 'survival of the fittest' in the struggle for life is the goal of evolution—is a question which brings us at once to the consideration of the ethical significance of the theory. For it seems to lay claim to give both an explanation of progress and an interpretation of what constitutes worth in conduct.

II.

ETHICS AND EVOLUTION.

There are two things which are not always kept distinct,—what may be called the 'evolution of ethics' and the 'ethics of evolution,' The former might more correctly be called the evolution of morality,—the account of the way in which moral customs, moral institutions, and moral ideas have been developed and have come to take their place in the life of mankind. Clearly these are all features of human life; and, if the theory of evolution applies to human life, we must expect it also to have some contribution to make to this portion of man's development,—to the growth of the customs, institutions, and ideas which enter into and make up his morality.

But by the 'ethics of evolution' is meant something more than the 'evolution of ethics' or development of morality. It signifies a theory which turns the facts of evolution to account in determining the value for man of different kinds of conduct and feeling and idea. When one speaks of the ethics of evolution one must be understood to mean that the evolution theory does something more than trace the history of things, that it gives us somehow or other a standard or criterion of moral worth or value. This additional point may be expressed by the technical distinction between origin and validity. Clearly there is a very great difference between showing how something has come to be what it is and assigning to it worth or validity for the guidance of life or thought It may be that the former enquiry has some bearing upon the latter; but only confusion will result if the two problems are not clearly distinguished at the outset,—as they very seldom are distinguished by writers on the theory of evolution in its application to ethics.

It may be said that the evolutionist writers on ethics seek to base an ethics of evolution upon the evolution of ethics, but that they are not always aware of the real nature and difficulties of their task. Sometimes they seem to think that in tracing the evolution of ethics they are also and at the same time determining and establishing a theory of the ethics of evolution. We must avoid this error, and keep the two problems distinct in our minds. Yet from the nature of the case it holds true that it is only through the facts which the theory of evolution establishes or can establish as to the development of morality that it is able to make any contribution to the solution of the further question as to the criterion of morality—the question, that is to say, of moral worth or value.

We cannot, therefore, avoid dealing with the evolution of ethics. But in what follows I am not considering it for its own sake—though it is an interesting and important question. In order to simplify the argument, we may allow what is claimed for it, and give the evolutionist credit for even greater success on the field of historical investigation—which is his own field—than he would, if fair-minded, claim for himself. The problem I have in view lies beyond this historical question. It is the problem how far the known facts and probable theories regarding the development of morality can make any contribution towards determining the standard of worth for our ideas, our sentiments, and our conduct. Now if we read the accredited exponents of the doctrine of evolution we shall find amongst them a considerable variety of view regarding the bearing of the theory of evolution upon this properly ethical problem—the problem of the criterion or standard of goodness.

In the first place, it is desirable to characterise briefly Darwin's own contribution to this matter. The suggestion made by him deals almost entirely with what I have called the development of morality, not with the ethics of evolution; and perhaps it may seem to us now a rather obvious suggestion. But he was the first to make this suggestion; and it comes from him as a direct application of the theory he had established with regard to animal development. His suggestion is simply this—that moral qualities are selected in the struggle for existence in much the same way as purely physical or animal excellences are selected, that is, by their contributing to the continued and more efficient life of the organism. But Darwin saw very clearly that the qualities which are recognised as moral are not by any means in all cases contributory to individual success and efficiency. They are not all of them qualities that contribute to the success of one individual in his struggle with other individuals for the means of subsistence. We may say that courage, prudence, self-reliance, will have that effect, and that consequently in the struggle for life the individuals who show such qualities will have a better chance of survival than those without them. But what about qualities such as sympathy, willingness to help another, obedience, and faithfulness to a community or to a cause? Clearly, these are not qualities which are of special assistance to the individual. But they are qualities which are or may be of very great importance to the tribe or community of individuals. Supposing such qualities of mutual help, of willingness even to sacrifice oneself for others—the qualities which are commonly grouped as expressions of the social instinct,—supposing these to have been somehow developed in the members of a tribe, that tribe would, other things being equal, have an advantage in a struggle with another tribe whose members did not possess these qualities. Now the advantage thus gained in the struggle would be a case of the operation of natural selection: it would exterminate or weaken the tribe without these social qualities, and it would thus give opportunity for the growing efficiency of the tribe that possessed them.

Put in the briefest way, this is the explanation which Darwin gave of the growth of the social qualities in mankind; and the social qualities make up, to a large extent at any rate, what we call moral qualities. Darwin, however, saw further than this: he saw that, while this might account for the development of what we may call savage and barbarian virtues, there was in civilised mankind a development of sympathy which went far beyond this, and which one could not with good reason account for by asserting that it rendered assistance to the community in its struggle for existence with other communities.

Thus, with regard to the former question, he says: "A tribe including many members who, from possessing in a high degree the spirit of patriotism, fidelity, obedience, courage, and sympathy, were always ready to aid one another, and to sacrifice themselves for the common good, would be victorious over most other tribes; and this would be natural selection[1]."