The opening of Preface
Of the Ethics founded on the theory of Evolution, I have considered only the independent theories which have been elaborated to systems. I have omitted consideration of many works which bear on Evolutional Ethics as practical or exhortative treatises, or compilations of facts, but which involve no distinctly worked-out theory of morals. On the other hand, I have ventured to include Professor von Gizycki's "Moralphilosophie" among the theoretical systems founded upon the theory of Evolution, since, although the popular form of the work renders the prominence of the latter theory impracticable, the warp of Evolution is clearly perceptible throughout it. In analyzing Hoeffding's work, I have made use not of the Danish but the German edition of his "Ethics," which was translated with his cooeperation.