This book is a revised and enlarged edition of my “Outline of Ancient Indian History and Civilization” which was published in 1927 and has been out of print since 1938. Constant demands for the book, ever since, showed that the object with which it was written, as explained in the preface, was more than fulfilled. Owing to a variety of circumstances I could not bring out a second edition of the book during the next ten years. When at last I had some leisure to take up the work. I found that the book, in its present form, has, to some extent, outlived its utility, as there are already several other works of the same nature in the field. At the same time I felt the necessity of a book on ancient Indian history and culture of a more advanced type, which would not only serve the needs of general readers but may also be sued as preliminary handbook by more earnest students who require a thorough grasp of the essential facts and features before taking up specialized study in any branch of the subject. Incidentally I also kept in view the requirements of the growing number of candidates for competitive examinations in which ancient India history and culture is a prescribed subject.