down, where structures and functions are little developed, and the power of adjusting acts to ends but slight, there is no conduct, properly so named, furthering salvation of the species. Race-maintaining conduct, like self-maintaining conduct, arises gradually out of that which cannot be called conduct: adjusted actions are preceded by unadjusted ones.
Protozoa spontaneously divide and sub-divide, in consequence of physical changes over which they have no control; or, at other times, after a period of quiescence, break up into minute portions which severally grow into new individuals. In neither case can conduct be alleged. Higher up, the process is that of ripening, at intervals, germ-cells and sperm-cells, which, on occasion, are sent forth into the surrounding water and left to their fate: perhaps one in ten thousand surviving to maturity. Here, again, we see only development and dispersion going on apart from parental care. Types above these, as fish which choose fit places in which to deposit their ova, or as the higher crustaceans which carry masses of ova about until they are hatched, exhibit adjustments of acts to ends which we may properly call conduct, though it is of the simplest kind. Where, as among certain fish, the male keeps guard over the eggs, driving away intruders, there is an additional adjustment of acts to ends; and the applicability of the name conduct is more decided.
Passing at once to creatures far superior, such as birds, which, building nests and sitting on their eggs, feed their broods for considerable periods, and give them aid after they can fly; or such as mammals which, suckling their young for a time, continue afterward to bring them food or protect them while they feed, until they reach ages at which they can provide for themselves; we are shown how this conduct which furthers race-maintenance evolves hand-in-hand with the conduct which furthers self-maintenance. That better organization which makes possible the last, makes possible the first also.
Mankind exhibit a great progress of like nature. Compared with brutes, the savage, higher in his self-maintaining conduct, is higher too in his race-maintaining conduct. A larger number of the wants of offspring are provided for; and parental care, enduring longer, extends to the disciplining of offspring in arts and habits which fit them for their conditions of existence. Conduct of this order, equally with conduct of the first order, we see becoming evolved in a still greater degree as we ascend from savage to civilized. The adjustments of acts to ends in the rearing of children become far more elaborate, alike in number of ends met, variety of means used, and efficiency of their adaptations; and the aid and oversight are continued throughout a much greater part of early life.
In tracing up the evolution of conduct, so that we may frame a true conception of conduct in general, we have thus to recognize these two kinds as mutually dependent. Speaking generally, neither can evolve without evolution of the other; and the highest evolutions of the two must be reached simultaneously.
§ 6. To conclude, however, that on reaching a perfect adjustment of acts to ends subserving individual life and the rearing of offspring, the evolution of conduct becomes complete, is to conclude erroneously. Or rather, I should say, it is an error to suppose that either of these kinds of conduct can assume its highest form, without its highest form being assumed by a third kind of conduct yet to be named.
The multitudinous creatures of all kinds which fill the earth, cannot live wholly apart from one another, but are more or less in presence of one another—are interfered with by one another. In large measure the adjustments of acts to ends which we have been considering, are components of that "struggle for existence" carried on both between members of the same species and between members of different species; and, very generally, a successful adjustment made by one creature involves an unsuccessful adjustment made by another creature, either of the same kind or of a different kind. That the carnivore may live herbivores must die; and that its young may be reared the young of weaker creatures must be orphaned. Maintenance of the hawk and its brood involves the deaths of many small birds; and that small birds may multiply, their progeny must be fed with innumerable sacrificed worms and larvæ. Competition among members of the same species has allied, though less conspicuous, results. The stronger often carries off by force the prey which the weaker has caught. Monopolizing certain hunting grounds, the more ferocious drive others of their kind into less favorable places. With plant-eating animals, too, the like holds: the better food is secured by the more vigorous individuals, while the less vigorous and worse fed, succumb either directly from innutrition or indirectly from resulting inability to escape enemies. That is to say, among creatures whose lives are carried on antagonistically, each of the two kinds of conduct delineated above, must remain imperfectly evolved. Even in such few kinds of them as have little to fear from enemies or competitors, as lions or tigers, there is still inevitable failure in the adjustments of acts to ends toward the close of life. Death by starvation from inability to catch prey, shows a falling short of conduct from its ideal.
This imperfectly-evolved conduct introduces us by antithesis to conduct that is perfectly evolved. Contemplating these adjustments of acts to ends which miss completeness because they cannot be made by one creature without other creatures being prevented from making them, raises the thought of adjustments such that each creature may make them without preventing them from being made by other creatures. That the highest form of conduct must be so distinguished, is an inevitable implication; for, while the form of conduct is such that adjustments of acts to ends by some necessitate non-adjustments by others, there remains room for modifications which bring conduct into a form avoiding this, and so making the totality of life greater.
From the abstract let us pass to the concrete. Recognizing men as the beings whose conduct is most evolved, let us ask under what conditions their conduct, in all three aspects of its evolution, reaches its limit. Clearly while the lives led are entirely predatory, as those of savages, the adjustments of acts to ends fall short of this highest form of conduct in every way. Individual life, ill carried on from hour to hour, is prematurely cut short; the fostering of offspring often fails, and is incomplete when it does not fail; and in so far as the ends of self-maintenance and race-maintenance are met, they are met by destruction of other beings of different kind or of like kind. In social groups formed by compounding and re-compounding primitive hordes, conduct remains imperfectly evolved in proportion as there continue antagonisms between the groups and antagonisms between members of the same group—two traits necessarily associated; since the nature which prompts international aggression prompts aggression of individuals on one another. Hence the limit of evolution can be reached by conduct only in permanently peaceful societies. That perfect adjustment of acts to ends in maintaining individual life and rearing new individuals, which is effected by each without hindering others from effecting like perfect adjustments, is, in its very definition, shown to constitute a kind of conduct that can be approached only as war decreases and dies out.
A gap in this outline must now be filled up. There remains a further advance not yet even hinted. For beyond so behaving that each achieves his ends without preventing others from achieving their ends, the members of a society may give mutual help in the achievement of ends. And if, either indirectly by industrial co-operation, or directly by volunteered aid, fellow-citizens can make easier for one another the adjustments of acts to ends, then their conduct assumes a still higher phase of evolution; since whatever facilitates the making of adjustments by each, increases the totality of the adjustments made, and serves to render the lives of all more complete.
§ 7. The reader who recalls certain passages in First Principles, in the Principles of Biology, and in the Principles of Psychology, will perceive above a restatement, in another form, of generalizations set forth in those works. Especially will he be reminded of the proposition that Life is "the definite combination of heterogeneous changes, both simultaneous and successive, in correspondence with external co-existences and sequences;" and still more of that abridged and less specific formula, in which Life is said to be "the continuous adjustment of internal relations to external relations."
The presentation of the facts here made differs from the presentations before made, mainly by ignoring the inner part of the correspondence and attending exclusively to that outer part constituted of visible actions. But the two are in harmony; and the reader who
