The part of the book devoted to the discussion of remedial measures will probably attract more criticism than any other. I expect, and am prepared for, criticism from those, on the one hand, who will accuse me of being too radical and revolutionary, and, on the other hand, those who will say I have ignored almost all radical measures. I have purposely refrained from considering any of the far-reaching speculations of the “schools,” and confined myself entirely to those measures which have been tried in various places with sufficient success to warrant their general adoption, and which do not involve any revolutionary change in our social system. I have tried, in other words, to formulate a programme of practical measures, all of which have been subjected to the test of experience. A word of personal explanation may not be out of place here. I have been privileged to know something of the leisure and luxury of wealth, and more of the toil and hardship of poverty. When I write of hunger I write of what I have experienced—not the enviable hunger of health, but the sickening hunger of destitution. So, too, when I write of child labor. I _know_ that nothing I have written of the toil of little boys and girls, terrible as it may seem to some readers, approaches the real truth in its horror. I have not tried to write a sensational book, but to present a careful and candid statement of facts which seem to me to be of vital social significance. As far as possible, I have freely acknowledged my indebtedness to other writers, either in the text or in the list of authorities at the end of the book. It was, however, impossible thus to acknowledge all the help received from so many willing friends in this and other countries. Hundreds of school principals and teachers, physicians, nurses, settlement workers, public officials, and others, in this country and in Europe, have aided me. It is impossible to name them all, and I can only hope that they will find themselves rewarded, in a measure, by the work to which they have contributed so much.