Pass now to those actions more commonly thought of as the occasions for rules of conduct. Let us assume the man to be continually robbed of that which was given him in exchange for his labor, and by which he was to make up for nervo-muscular expenditure and renew his powers. No less than before is the connection between conduct and consequence rooted in the constitution of things; unchangeable by State-made law, and not needing establishment by empirical generalization. If the action by which the man is affected is a stage further away from the results, or produces results of a less decisive kind, still we see the same basis for morality in the physical order. Imagine that payment for his services is made partly in bad coin; or that it is delayed beyond the date agreed upon; or that what he buys to eat is adulterated with innutritive matter. Manifestly, by any of these deeds which we condemn as unjust, and which are punished by law, there is, as before, an interference with the normal adjustment of physiological repair to physiological waste. Nor is it otherwise when we pass to kinds of conduct still more remotely operative. If he is hindered from enforcing his claim, if class-predominance prevents him from proceeding, or if a bribed judge gives a verdict contrary to evidence, or if a witness swears falsely, have not these deeds, though they affect him more indirectly, the same original cause for their wrongness?
Even with actions which work diffused and indefinite mischiefs it is the same. Suppose that the man, instead of being dealt with fraudulently, is calumniated. There is, as before, a hinderance to the carrying on of life-sustaining activities; for the loss of character detrimentally affects his business. Nor is this all. The mental depression caused partially incapacitates him for energetic activity, and perhaps brings on ill-health. So that maliciously or carelessly propagating false statements tends both to diminish his life and to diminish his ability to maintain life. Hence its flagitiousness.
Moreover, if we trace to their ultimate ramifications the effects wrought by any of these acts which morality called intuitive reprobates—if we ask what results not to the individual himself only, but also to his belongings—if we observe how impoverishment hinders the rearing of his children, by entailing under-feeding or inadequate clothing, resulting perhaps in the death of some and the constitutional injury of others; we see that by the necessary connections of things these acts, besides tending primarily to lower the life of the individual aggressed upon, tend, secondarily, to lower the lives of all his family, and thirdly, to lower the life of society at large; which is damaged by whatever damages its units.
A more distinct meaning will now be seen in the statement that the utilitarianism which recognizes only the principles of conduct reached by induction, is but preparatory to the utilitarianism which deduces these principles from the processes of life as carried on under established conditions of existence.
§22. Thus, then, is justified the allegation made at the outset, that, irrespective of their distinctive characters and their special tendencies, all the current methods of ethics have one general defect—they neglect ultimate causal connections. Of course I do not mean that they wholly ignore the natural consequences of actions; but I mean that they recognize them only incidentally. They do not erect into a method the ascertaining of necessary relations between causes and effects, and deducing rules of conduct from formulated statement of them.
Every science begins by accumulating observations, and presently generalizes these empirically; but only when it reaches the stage at which its empirical generalizations are included in a rational generalization, does it become developed science. Astronomy has already passed through its successive stages: first collections of facts; then inductions from them; and lastly deductive interpretations of these, as corollaries from a universal principle of action among masses in space. Accounts of structures and tabulations of strata, grouped and compared, have led gradually to the assigning of various classes of geological changes to igneous and aqueous actions; and it is now tacitly admitted that Geology becomes a science proper, only as fast as such changes are explained in terms of those natural processes which have arisen in the cooling and solidifying earth, exposed to the sun's heat and the action of the moon upon its ocean. The science of life has been, and is still, exhibiting a like series of steps; the evolution of organic forms at large is being affiliated on physical actions in operations from the beginning; and the vital phenomena each organism presents are coming to be understood as connected sets of changes, in parts formed of matters that are affected by certain forces and disengage other forces. So is it with mind. Early ideas concerning thought and feeling ignored everything like cause, save in recognizing those effects of habits which were forced on men's attention and expressed in proverbs; but there are growing up interpretations of thought and feeling as correlates of the actions and reactions of a nervous structure, that is influenced by outer changes and works in the body adapted changes: the implication being that Psychology becomes a science as fast as these relations of phenomena are explained as consequences of ultimate principles. Sociology, too, represented down to recent times only by stray ideas about social organization, scattered through the masses of worthless gossip furnished us by historians, is coming to be recognized by some as also a science; and such adumbrations of it as have from time to time appeared in the shape of empirical generalizations, are now beginning to assume the character of generalizations made coherent by derivation from causes lying in human nature placed under given conditions. Clearly then, Ethics, which is a science dealing with the conduct of associated human beings, regarded under one of its aspects, has to undergo a like transformation; and, at present undeveloped, can be considered a developed science only when it has undergone this transformation.
A preparation in the simpler sciences is pre-supposed. Ethics has a physical aspect; since it treats of human activities which, in common with all expenditures or energy, conform to the law of the persistence of energy: moral principles must conform to physical necessities. It has a biological aspect; since it concerns certain effects, inner and outer, individual and social, of the vital changes going on in the highest type of animal. It has a psychological aspect; for its subject matter is an aggregate of actions that are prompted by feelings and guided by intelligence. And it has a sociological aspect; for these actions, some of them directly and all of them indirectly, affect associated beings.
What is the implication? Belonging under one aspect to each of these sciences—physical, biological, psychological, sociological—it can find its ultimate interpretations only in those fundamental truths which are common to all of them. Already we have concluded in a general way that conduct at large, including the conduct Ethics deals with, is to be fully understood only as an aspect of evolving life; and now we are brought to this conclusion in a more special way.
§ 23. Here, then, we have to enter on the consideration of moral phenomena as phenomena of evolution; being forced to do this by finding that they form a part of the aggregate of phenomena which evolution has wrought out. If the entire visible universe has been evolved—if the solar system as a whole, the earth as a part of it, the life in general which the earth bears, as well as that of each individual organism—if the mental phenomena displayed by all creatures, up to the highest, in common with the phenomena presented by aggregates of these highest—if one and all conform to the laws of evolution; then the necessary implication is that those phenomena of conduct in these highest creatures with which Morality is concerned, also conform.