Let us consider how the development of sympathy, which must advance as fast as conditions permit, will bring about this state.

§ 93. We have seen that during the evolution of life, pleasures and pains have necessarily been the incentives to, and deterrents from, actions which the conditions of existence demanded and negatived. An implied truth to be here noted is, that faculties which, under given conditions, yield partly pain and partly pleasure, cannot develop beyond the limit at which they yield a surplus of pleasure: if beyond that limit more pain than pleasure results from exercise of them, their growth must be arrested.

Through sympathy both these forms of feeling are excited. Now a pleasurable consciousness is aroused on witnessing pleasure; now a painful consciousness is aroused on witnessing pain. Hence, if beings around him habitually manifest pleasure and but rarely pain, sympathy yields to its possessor a surplus of pleasure; while, contrariwise, if little pleasure is ordinarily witnessed and much pain, sympathy yields a surplus of pain to its possessor. The average development of sympathy must, therefore, be regulated by the average manifestations of pleasure and pain in others. If the life usually led under given social conditions is such that suffering is daily inflicted, or is daily displayed by associates, sympathy cannot grow: to assume growth of it is to assume that the constitution will modify itself in such way as to increase its pains and therefore depress its energies; and is to ignore the truth that bearing any kind of pain gradually produces insensibilty to that pain, or callousness. On the other hand, if the social state is such that manifestations of pleasure predominate, sympathy will increase; since sympathetic pleasures, adding to the totality of pleasures enhancing vitality, conduce to the physical prosperity of the most sympathetic, and since the pleasures of sympathy exceeding its pains in all, lead to an exercise of it which strengthens it.

The first implication is one already more than once indicated. We have seen that along with habitual militancy and under the adapted type of social organization, sympathy cannot develop to any considerable height. The destructive activities carried on against external enemies sear it; the state of feeling maintained causes within the society itself frequent acts of aggression or cruelty; and further, the compulsory co-operation characterizing the militant régime necessarily represses sympathy—exists only on condition of an unsympathetic treatment of some by others.

But even could the militant régime forthwith end, the hinderance to development of sympathy would still be great. Though cessation of war would imply increased adaptation of man to social life, and decrease of sundry evils, yet there would remain much non-adaptation and much consequent unhappiness. In the first place, that form of nature which has generated and still generates wars, though by implication raised to a higher form, would not at once be raised to so high a form that there would cease all injustices and the pains they cause. For a considerable period after predatory activities had ended, the defects of the predatory nature would continue: entailing their slowly diminishing evils. In the second place, the ill-adjustment of the human constitution to the pursuits of industrial life, must long persist, and may be expected to survive in a measure the cessation of wars: the required modes of activity must remain for innumerable generations in some degree displeasurable. And in the third place, deficiencies of self-control such as the improvident show us, as well as those many failures of conduct due to inadequate foresight of consequences, though less marked than now, could not fail still to produce suffering.

Nor would even complete adaptation, if limited to disappearance of the non-adaptations just indicated, remove all sources of those miseries which, to the extent of their manifestation, check the growth of sympathy. For while the rate of multiplication continues so to exceed the rate of mortality as to cause pressure on the means of subsistence, there must continue to result much unhappiness; either from balked affections or from overwork and stinted means. Only as fast as fertility diminishes, which we have seen it must do along with further mental development (Principles of Biology, §§ 367–377), can there go on such diminution of the labors required for efficiently supporting self and family, that they will not constitute a displeasurable tax on the energies.

Gradually then, and only gradually, as these various causes of unhappiness become less can sympathy become greater. Life would be intolerable if, while the causes of misery remained as they now are, all men were not only in a high degree sensitive to the pains, bodily and mental, felt by those around and expressed in the faces of those they met, but were unceasingly conscious of the miseries everywhere being suffered as consequences of war, crime, misconduct, misfortune, improvidence, incapacity. But, as the molding and re-molding of man and society into mutual fitness progresses, and as the pains caused by unfitness decrease, sympathy can increase in presence of the pleasures that come from fitness. The two changes are indeed so related that each furthers the other. Such growth of sympathy as conditions permit, itself aids in lessening pain and augmenting pleasure: and the greater surplus of pleasure that results makes possible further growth of sympathy.

§ 94. The extent to which sympathy may develop when the hinderances are removed, will be better conceived after observing the agencies through which it is excited, and setting down the reasons for expecting those agencies to become more efficient. Two factors have to be considered—the natural language of feeling in the being sympathized with, and the power of interpreting that language in the being who sympathizes. We may anticipate development of both.

Movements of the body and facial changes are visible effects of feeling which, when the feeling is strong, are uncontrollable. When the feeling is less strong, however, be it sensational or emotional, they may be wholly or partially repressed; and there is a habit, more or less constant, of repressing them; this habit being the concomitant of a nature such that it is often undesirable that others should see what is felt. So necessary with our existing characters and conditions are concealments thus prompted, that they have come to form a part of moral duty; and concealment for its own sake is often insisted upon as an element in good manners. All this is caused by the prevalence of feelings at variance with social good—feelings which cannot be shown without producing discords or estrangements. But in proportion as the egoistic desires fall more under control of the altruistic, and there come fewer and slighter impulses of a kind to be reprobated, the need for keeping guard over facial expression and bodily movement will decrease, and these will with increasing clearness convey to spectators the mental state. Nor is this all. Restrained as its use is, this language of the emotions is at present prevented from growing. But as fast as the emotions become such that they may be more candidly displayed, there will go, along with the habit of display, development of the means of display; so that besides the stronger emotions, the more delicate shades and smaller degrees of emotion will visibly exhibit themselves; the emotional language will become at once more copious, more varied, more definite. And obviously sympathy will be proportionately facilitated.

An equally important, if not a more important, advance of kindred nature, is to be anticipated. The vocal signs of sentient states will simultaneously evolve further. Loudness of tone, pitch of tone, quality of tone, and change of tone, are severally marks of feeling; and, combined in different ways and proportions, serve to express different amounts and kinds of feelings. As elsewhere pointed out, cadences are the comments of the emotions on the propositions of the intellect[J]. Not in excited speech only, but in ordinary speech, we show by ascending and descending intervals, by degrees of deviation from the medium tone, as well as by place and strength of emphasis, the kind of sentiency which accompanies the thought expressed. Now the manifestation of feeling by cadence, like its manifestation by visible changes, is at present under restraint; the motives for repression act in the one case as they act in the other. A double effect is produced. This audible language of feeling is not used up to the limit of its existing capacity; and it is to a considerable degree misused, so as to convey other feelings than those which are felt. The result of this disuse and misuse is to check that evolution which normal use would cause. We must infer, then, that as moral adaptation progresses, and there is decreasing need for concealment of the feelings, their vocal signs will develop much further. Though it is not to be supposed that cadences will ever convey emotions as exactly as words convey thoughts, yet it is quite possible that the emotional language of the future may rise as much above our present emotional language, as our intellectual language has already risen above the intellectual language of the lowest races.