justice and mercy—The supreme arbiter—The courage of Moral Sincerity—Heroic characters—The final destruction of the human species—The loss of belief in personal immortality—The human and earthly ideal 529-581

A REVIEW OF EVOLUTIONAL ETHICS

Part I

INTRODUCTORY REMARKS

In the preface to the latest edition of his "Natürliche Schöpfungsgeschichte," Haeckel, writing of recent developments of thought on the subject of evolution, and the change of attitude observable in our later literature, says: "The vast mass of literature, yearly increasing in astonishing measure, on the theory of evolution in its various branches, best illustrates the remarkable change which public opinion has undergone. Twenty years ago, the greater part of this literature was in opposition to Darwin; to-day such opposition is not to be feared from well-informed students of science. On the other hand, almost the whole literature of biology now gives testimony in Darwin's favor, for almost all zoölogical, and botanical, anatomic, and ontogenetic works are founded upon the principles of the development of species, and derive from Darwin their best and most fruitful ideas."

No science is a better exponent of this radical and important change than that which has to do with the principles of morals; for by no science was the theory of evolution assailed, in the beginning, with more vehemence and indefatigability. Not only did the zealous adherents of Christian dogma fear to find, in the destruction of all distinct barriers between the different forms of animal life, a ground for the denial of God's especial favor to man, and the worshippers of emotional morals become indignant at the unveiling of the divine Mystic (as if only ignorance were reverence, and only the Unknown worthy of homage), but even the less conservative schools of philosophy often showed themselves unfavorable or hesitant towards the new ideas, dreading their implications. All this is changed. If England's most popular living philosopher was among the first to declare himself for Darwin, and to revise his whole system in accordance with the theory of evolution, so that this theory early began to find adherents among students of philosophy in all lands where English is spoken, it was not long before the newer schools of France and Germany began to follow in their wake. Now every year, and almost every month, brings with it a fresh supply of books, pamphlets, and magazine articles on "The Evolution of Morality," "L'Evolution de la Morale," "Die Evolution der Sittlichkeit," "Sittlichkeit und Darwinismus," etc. So many are the waters which now pour themselves into this common stream that the current threatens soon to become too deep and swift for any but the most expert swimmers.

In a short review of Evolutional Ethics, it will be impossible to consider all the literature that has added to our knowledge on this subject; we must confine ourselves to the few books that are most prominent. The first laborer in this line, not only indirectly through general theory, but also directly through particular theory, is, as usual, Charles Darwin; and though Darwin was himself no psychologist, and moreover advances his ideas on the origin and development of morals only in the tentative manner that necessarily attaches to a first attempt when made by so conscientious a thinker, he doubtless suggested to all other writers in this field a very large part of that which was best in their work. A Review of Evolutional Ethics must, therefore, in order to start with the proper origin of the science, begin with

CHARLES DARWIN

In the essay on "Instinct" appended to G. J. Romanes' "Mental Evolution in Animals,"[1] Darwin says: "The social instinct is indispensable to some animals, useful to still more, and apparently only pleasant to some few animals." The social tendency being thus classed as an instinct, it belongs to our work to examine what are Darwin's theories as to the origin and nature of instinct.

In the chapter on "Instinct," in "The Origin of Species," Darwin premises: "I have nothing to do with the origin of the mental powers, any more than I have with that of life itself."[2] Again: "Frederick Cuvier and several of the older metaphysicians have compared instinct with habit. This comparison gives, I think, an accurate notion of the frame of mind under which an instinctive action is performed, but not necessarily of its origin.... If we suppose any habitual action to become inherited—and it can be shown that this does sometimes happen—then the resemblance between what originally was a habit and an instinct becomes so close as not to be distinguished.... But it would be a serious error to suppose that the greater number of instincts have been acquired by habit in one generation, and then transmitted by inheritance to succeeding generations. It can be clearly shown that the most wonderful instincts with which we are acquainted, namely, those of the hive-bee and of many ants, could not possibly have been acquired by habit."[3] Of one of the habits of these last-named insects Darwin, however, writes: "I have not rarely felt that small and trifling instincts were a greater difficulty on our theory than those which have so justly excited the wonder of mankind; for an instinct, if really of no considerable importance in the struggle for life, could not be modified or formed through natural selection. Perhaps as striking an instance as can be given is that of the workers of the hive-bee arranged in files and ventilating, by a peculiar movement of their wings, the well-closed hive: this ventilation has been artificially imitated, and as it is carried on even during winter, there can be no doubt that it is to bring in free air and displace the carbonic acid gas; therefore it is in truth indispensable, and we may imagine the stages—a few bees first going to the orifice to fan themselves—by which the instinct might have been arrived at."[4] Again: "Glancing at instincts, marvellous as some are, they offer no greater difficulty than do corporeal structures on the theory of the natural selection of successive slight, but profitable modifications. We can thus understand why nature moves by graduated steps in endowing different animals of the same class with their several instincts."[5] And again: "As I believe, the most wonderful of all known instincts, that of the hive-bee, can be explained by natural selection having taken advantage of numerous successive, slight modifications of simpler instincts, natural selection having, by slow