The writer, so far as he knows himself, has had no _arrière pensée_ in describing this great moral and spiritual movement. As M. Boissier has pointed out, the historian of the Antonine age is free to treat paganism apart from the growth of the Christian Church. The pagan world of that age seems to have had little communication with the loftier faith which, within a century and a half from the death of M. Aurelius, was destined to seize the sceptre. To Juvenal, Tacitus, and Pliny, to Plutarch, Dion Chrysostom, Lucian, and M. Aurelius, the Church is hardly known, or known as an obscure off-shoot of Judaism, a little sect, worshipping a “crucified Sophist” in somewhat suspicious retirement, or more favourably distinguished by simple-minded charity. The modern theologian can hardly be content to know as little of the great movement in the heathen world which prepared or deferred the victory of the Church. It will be evident to any critical reader that the scope of this book is strictly limited. As in a former work on the Society of the later Empire, attention has been concentrated on the inner moral life of the time, and comparatively little space has been given to its external history and the machinery of government. The relation of the Senate to the Emperor in the first century, and the organisation of the municipal towns have been dwelt on at some length, because they affected profoundly the moral character of the age. On the particular field which the writer has surveyed, Dean Merivale, Dr. Mahaffy, Professor Bury, and Mr. Capes have thrown much light by their learning and sympathy. But these distinguished writers have approached the period from a different point of view from that of the present author, and he believes that he has not incurred the serious peril of appearing to compete with them. He has, as a first duty, devoted himself to a complete survey of the literature and inscriptions of the period. References to the secondary authorities and monographs which he has used will be found in the notes. But he owes a special obligation to Friedländer, Zeller, Réville, Schiller, Boissier, Martha, Peter, and Marquardt, for guidance and suggestion. He must also particularly acknowledge his debt to M. Cumont’s exhaustive work on the monuments of Mithra. Once more he has to offer his warmest gratitude to his learned friend, the Rev. Charles Plummer, Fellow of C.C.C., Oxford, for the patience and judgment with which he has revised the proof sheets. His thanks are also due to the Messrs. R. and R. Clark’s reader, for the scrupulous accuracy which has saved the author much time and labour. _September 19, 1904._ CONTENTS BOOK I CHAPTER I THE ARISTOCRACY UNDER THE TERROR