The significance of this text in Ethics lies in its effort to awaken a vital conviction of the genuine reality of moral problems and the value of reflective thought in dealing with them. To this purpose are subordinated the presentation in Part I. of historic material; the discussion in Part II. of the different types of theoretical interpretation, and the consideration, in Part III., of some typical social and economic problems which characterize the present. Experience shows that the student of morals has difficulty in getting the field objectively and definitely before him so that its problems strike him as real problems. Conduct is so intimate that it is not easy to analyze. It is so important that to a large extent the perspective for regarding it has been unconsciously fixed by early training. The historical method of approach has proved in the classroom experience of the authors an effective method of meeting these difficulties. To follow the moral life through typical epochs of its development enables students to realize what is involved in their own habitual standpoints; it also presents a concrete body of subject-matter which serves as material of analysis and discussion.