It will be noticed that the disputes and the technical language of theorists have been throughout so far as possible avoided. The discussion of historical theories and isms' is unnecessarily bewildering to the beginner; and the aim has been rather to keep as close as possible to the actual experience of the student and the language of everyday life. Far more attention is given than in most books on ethics to concrete contemporary problems. After all, an insight into the fallacies of the reasoning of the various ethical schools, an ability to know what they are talking about and glibly refute them, is of less importance than an acquaintance with, and a firm, intelligent attitude toward, the vital moral problems and movements of the day. I have prayed to be saved from academic abstractness and remoteness, and to go as straight as I could to the real perplexities from which men suffer in deciding upon their conduct. The purpose of a study of ethics is, primarily, to get light for the guidance of life. And so, while referring to authors who differ from the views here expressed, I have sought to impart a definite conception of relative values, to offer a thread for guidance through the labyrinth of moral problems, and to effect a heightened realization of the importance and the possibilities of right living. It is necessary, indeed, in order to justify and clarify our concrete moral judgments, that we should reach clear and firmly grounded conclusions upon the underlying abstract questions. And the habit of laying aside upon occasion one's instinctive or habitual moral preferences and discussing with open mind their justification and rationality is of great value to the individual and to society. Hence the first two Parts of this volume take up, as simply as is consonant with the really intricate questions involved, the history of the development of human morality and the psychological foundation of moral obligations and ideals. The exposition of the meaning of right and wrong there unfolded serves as a basis for the sound solution of the confused concrete issues, private and then public, which are discussed in the remainder of the volume.