From David Bentley Hart's introduction to his Atheist Delusions: The Christian Revolution and Its Fashionable Enemies:
This book chiefly - or at least centrally - concerns the history of the early church, of roughly the first four or five centuries, and the story of how Christendom was born out of the culture of late antiquity. My chief ambition in writing it is to call attention to the peculiar and radical nature of the new faith in that setting: how enormous a transformation of thought, sensibility, culture, morality, and spiritual imagination Christianity constituted in the age of pagan Rome; the liberation it offered from fatalism, cosmic despair, and the terror of occult agencies; the immense dignity it conferred upon the human person; its subversion of the cruelest aspects of pagan society; its (alas, only partial) demystification of political power; its ability to create moral community where none had existed before; and its elevation of active charity above all other virtues. Stated in its most elementary and most buoyantly positive form, my argument is, first of all, that among the many great transitions that have marked the evolution of Western civilization, whether convulsive or gradual, political or philosophical, social or scientific, material or spiritual, there has been only one - the triumph of Christianity - that can be called in the fullest sense a "revolution": a truly massive and epochal revision of humanity's prevailing vision of reality, so pervasive in its influence and so vast in its consequences as actually to have created a new conception of the world, of history, of human nature, of time, and of the moral good. To my mind, I should add, it was an event immeasurably more impressive in its cultural creativity and more ennobling in its moral power than any other movement of spirit, will, imagination, aspiration, or accomplishment in the history of the West. And I am convinced that, given how radically at variance Christianity was with the culture it slowly and relentlessly displaced, its eventual victory was an event of such improbability as to strain the very limits of our understanding of historical causality.