In this revised edition every chapter has been rewritten with reference to the momentous events that have filled the years since 1916, when the first edition of this work appeared. The statements of facts and figures have so far as possible been brought down to date. The materials formerly constituting the first two chapters have been distributed under other headings. New sections appear in every chapter, and new chapters have been added in the treatment of money, insurance, transportation, and socialism. Numerous charts have been added which, it is hoped, will be helpful to the reader. Most of these have been reproduced from charts prepared for the use of the author’s classes, and others have been taken from various sources. A brief list of references has been appended to each chapter.