Part II. of "The Principles of Ethics" is concerned with "The Inductions of Ethics." It opens with a chapter on the confusion of ethical thought due to the fact that, conforming to the general law of evolution, "the set of conceptions constituting ethics, together with the associated sentiments, arise out of a relatively incoherent and indefinite consciousness; and slowly acquire coherence and definiteness at the same time that the aggregate of them differentiates from the larger aggregate with which it originally mingled. Long remaining undistinguished, and then but vaguely discernible as something independent, ethics must be expected to acquire a distinct embodiment only when mental evolution has reached a high stage." "Originally, ethics has no existence apart from religion, which holds it in solution. Religion itself, in its earliest form, is undistinguished from ancestor-worship," which passes, in the second stage, into worship of dead rulers, and is a method of propitiation, prompted by self-interest. Among some peoples, the idea of sin is limited to offences against the gods; and in those other cases where there are ethical commands, the propriety of not offending God is the primary reason given for obeying them. This last phase of thought is illustrated by the religion of the Hebrews, among whom good and bad conduct was but little associated with the intrinsic natures of right and wrong. The popular belief is still that right and wrong become such by divine fiat.

The gods of primitive, warlike peoples were gods of war, and the belief in the moral virtue and honor of war still holds large place in the thought of the world. The ethics of enmity, thus taught at the same time with the ethics of amity necessary to the internal life of society, gave rise to utterly inconsistent and contradictory sentiments and ideas, which, in considerable measure, still exist side by side, in our churches and outside them.

But, together with these ethical conceptions, there have slowly evolved other, utilitarian conceptions, derived from a recognition of the natural consequences of acts. Authority has been introduced into these conceptions as the source of the duty of action in accordance with them; yet there has generally been also some perception of their fitness. Such utilitarian conceptions are to be found in the later Hebrew writings, among the Egyptians, Greeks, etc. "The divergence of expediency-ethics from theological ethics is well illustrated in Paley, who in his official character derived right and wrong from divine commands, and in his unofficial character derived them from observation of consequences. Since his day, the last of these views has spread at the expense of the first."

A still further simultaneous origin of moral dictates is found in the sentiments which have arisen with such habits of conformity to rules of conduct as have been furthered by survival of the fittest. We thus have a conflict of ethical ideas arising from the conflict of these various sanctions; and also from the further conflict that ensues where a later religion has been grafted on a more primitive one, as is the case everywhere in Christendom.

Among modern writers who assert the existence of a moral sense, there is a division between those who regard the dicta of conscience as supreme, and those who hold them to be subordinate to divine commands. The two are agreed in so far as they regard conscience as having a supernatural origin; and, in that they both recognize the moral sentiment as innate and suppose human nature to be everywhere the same, they are also, by implication, alike in supposing that the moral sentiment is identical in all men.

But as a matter of fact, the moral sentiment is connected with entirely different rules among different peoples, prescribing monogamy among one people, polygamy among another; demanding faithfulness and chastity on the part of women among one people, encouraging adultery among another, etc.

Common elements in all codes of rules for conduct are the consciousness of authority, whether that of a God, of a ruler or government, or of conscience, the more or less definite sense of power or coercion on the part of this authority, and the representation of public opinion. These elements, combined in different proportions, result in an idea and a feeling of obligation, forming a body of thought and feeling which may be termed pro-ethical, and which, with the mass of mankind, stands in place of the ethical.

"For now let us observe that the ethical sentiment and idea, properly so-called, are independent of the ideas and sentiments above described as derived from external authorities, and coercions, and approbations—religious, political, or social. The true moral consciousness which we name conscience does not refer to those extrinsic results of conduct which take the shape of praise or blame, reward or punishment, externally awarded; but it refers to the intrinsic results of conduct which in part and by some intellectually perceived, are mainly and by most intuitively felt. The moral consciousness proper does not contemplate obligations as artificially imposed by an external power; nor is it chiefly occupied with estimates of the amounts of pleasure and pain which given actions may produce, though these may be clearly or dimly perceived; but it is chiefly occupied with recognition of, and regard for, those conditions by fulfilment of which happiness is achieved or misery avoided." It may or may not be in harmony with the pro-ethical sentiment; but in any case it is "vaguely or distinctly recognized as the rightful ruler, responding as it does to consequences which are not artificial and variable, but to consequences which are natural and permanent." With the established supremacy of this ethical sentiment, the feeling of obligation retires into the background, right actions being performed "spontaneously or from liking." "Though, while the moral nature is imperfectly developed, there may often arise conformity to the ethical sentiment under a sense of compulsion by it; and though, in other cases, non-conformity to it may cause subsequent self-reproach (as instance a remembered lack of gratitude, which may be a source of pain without there being any thought of extrinsic penalty); yet with a moral nature completely balanced, neither of these feelings will arise, because that which is done is done in satisfaction of the appropriate desire."

Where the really ethical sentiment conflicts with the factitious idea and sentiment of obedience to legal authority, the latter may rule at the expense of the former, as, for instance, in the case of a pedler condemned for selling without a license. "His act of selling is morally justifiable, and forbidding him to sell without a license is morally unjustifiable—is an interference with his due liberty which is ethically unwarranted."

The remainder of Part II. of the "Principles of Ethics" is occupied with data cited to show that the amount of internal aggression, of revenge and robbery, is greater among peoples much occupied with external aggression, and that these decrease, while justice, generosity (which Mr. Spencer defines as having a double root, in the philoprogenitive instinct and the relatively modern feeling of sympathy), humanity (including kindness, pity, mercy), filial obedience, and industry, increase as more peaceful habits are reached. A greater veracity is also indirectly the result of this evolution, since a coercive internal structure of society is connected with external enmity, and such coercive structure is unfavorable to veracity. Chastity also increases with the social evolution, though it does not necessarily characterize societies of the non-militant type. Its increase is connected with the growth of the higher moral and æsthetic feelings; romantic love plays a predominant part in our art. Intemperance, as causing, indirectly, social evil by a lowering of social efficiency, must, in like manner, decrease with social advancement.