But after all, the intellectual origin of Nietzsche's ideas matters but little. Wheresoever they were derived from, he made them strikingly his own by raising them to the splendid elevation of his thought. And if nevertheless he has failed to take high rank and standing among the sages of the schools, this shortage in his professional prestige is more than counterbalanced by the wide reach of his influence among the laity. What might the re-classification, or perchance even the re-interpretation, of known facts about life have signified beside Nietzsche's lofty apprehension of the sacredness of life itself? For whatever may be the social menace of his reasoning, his commanding proclamation to an expectant age of the doctrine that Progress means infinite growth towards ideals of perfection has resulted in a singular reanimation of the individual sense of dignity, served as a potent remedy of social dry-rot, and furthered our gradual emergence from the impenetrable darkness of ancestral traditions. In seeking an adequate explanation of his power over modern minds we readily surmise that his philosophy draws much of its vitality from the system of science that underlies it. And yet while it is true enough that Nietzsche's fundamental thesis is an offshoot of the Darwinian theory, the violent individualism which is the driving principle of his entire philosophy is rather opposed to the general orientation of Darwinism, since that is social. Not to the author of the "Descent of Man" directly is the modern ethical glorification of egoism indebted for its measure of scientific sanction, but to one of his heterodox disciples, namely to the bio-philosopher W. H. Rolph, who in a volume named "Biologic Problems," with the subtitle, "An Essay in Rational Ethics,"(18) deals definitely with the problem of evolution in its dynamical bearings. The question is raised, Why do the extant types of life ascend toward higher goals, and, on reaching them, progress toward still higher goals, to the end of time? Under the reason as explained by Darwin, should not evolution stop at a definite stage, namely, when the object of the competitive struggle for existence has been fully attained? Self-preservation naturally ceases to act as an incentive to further progress, so soon as the weaker contestants are beaten off the field and the survival of the fittest is abundantly secured. From there on we have to look farther for an adequate causation of the ascent of species. Unless we assume the existence of an absolutistic teleological tendency to perfection, we are logically bound to connect upward development with favorable external conditions. By substituting for the Darwinian "struggle for existence" a new formula: "struggle for surplus," Rolph advances a new fruitful hypothesis. In all creatures the acquisitive cravings exceed the limit of actual necessity. Under Darwin's interpretation of nature, the struggle between individuals of