The theme of 'Christianity and Classical Culture' is the fundamental change in thought and action that occurred from the reign of Augustus to the time of Augustine. The classical world sought to practice politics and understand the world in purely rational terms, but the difficulties of this program were already evident as Christianity began developing a completely new understanding of the human world. It is from this revolution in ideas that our modern world was forged. W H Auden wrote of an earlier edition in The New Republic: Since the appearance of the first edition in 1940, I have read this book many times, and my conviction of its importance to the understanding not only of the epoch with which it is concerned, but also of our own, has increased with each rereading.