We saw that conduct is distinguished from the totality of actions by the exclusion of purposeless actions; but during evolution this distinction arises by degrees. We trace up conduct to the vertebrates and through the vertebrates to man, and find that here the adjustments of acts to ends are both more numerous and better than among lower mammals; and we find the same thing on comparing the doings of higher races of men with those of lower. These better adjustments favor, not only prolongation, but also increased amount of life. And among these adjustments of acts to ends, there are not only such as further individual life but also, evolving with these, such as favor the life of the species. Race-maintaining conduct, like self-maintaining conduct, arises gradually out of that which cannot be called conduct. The multitudinous creatures of all kinds which fill the earth are engaged in a continuous struggle for existence, in which the adjustments of acts to ends, being imperfectly evolved, miss completeness because they cannot be made by one creature without other creatures being prevented from making them. This imperfectly evolved conduct introduces us, by antithesis, to conduct which is perfectly evolved,--such adjustments that each creature may make them without preventing other creatures making them also. The conditions of such conduct cannot exist in predatory savage life; nor can it exist where there remains antagonism between individuals forming a group, or between groups of individuals,--two traits of life necessarily associated, since the nature which prompts international aggression prompts aggression of individuals on one another also. Hence the limit of evolution can be reached by conduct only in permanently peaceful societies; can be approached only as war decreases and dies out. The principle of beneficence is not derived by Spencer from the principle of freedom, in "Social Statics"; and here, as in the latter book, Spencer has difficulty with it. He says: "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 cooeperation, 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." Thus, then, says Spencer, "we have been led to see that Ethics has for its subject-matter that form which universal conduct assumes during the last stages of its evolution."