Beneath this thin, dominant, Roman upper crust was a vast population of artisans, tradesmen, agricultural and other laborers, serfs, and slaves. This great body of the commonality was to a remarkable degree still very purely Punic even in late Roman times. They differed ethnically, linguistically, religiously, and otherwise from their rulers.[7] We find St. Augustine, centuries after the Roman conquest, writing a letter in Latin to one of his clergy, but requesting him to translate it into Punic and communicate it to his congregation. It is useful to remind ourselves of the fact that the population of north Africa in the first centuries of the Christian era was much greater than it is now. Centuries of Mohammedan mis-government account for this in part but the chief cause is to be found in those profound climatic changes, the origins of which are still obscure, that have reduced to desolate and barren wilderness whole regions which in Roman times abounded in populous cities and in rich and fertile agricultural lands. This large population had the cohesion which results from centuries of similar and essentially unchanged social habits and it had also that sense of strength which comes from large numbers, and that pride which results from the inheritance of a proud history. They never wholly lost that spirit which had made their ancestors great. They never forgot that in former ages they had competed as the equals of Rome for the lordship of the world.
To the South toward the Desert and the Atlas Mountains dwelt a third section of the population. They were nomads or semi-nomads, troglodytes, and mountain peoples. Their manner of life remains essentially the same today as it was in Roman times and as it was for centuries before Rome set foot in Africa. The Romans never succeeded in subduing this population except temporarily and for short periods. The imperial government did what it could, and by means of military posts and patrols kept a kind of order, but its success was only moderate.
Christianity in Roman Africa reflects this threefold division of the population, as is to be expected. Cyprian, in spite of the sincere religious faith and high moral character which elevates him so high above the social class to which he belonged, is still the most typical hierarch of his age. In his writings we find the whole philosophy of the governing class translated into ecclesiastical language. It is highly significant that in all the numerous and voluminous writings of this Father there is not a line about Chiliasm. Ideas of such a nature found little reception in the minds of men daily engaged in the practical duties of making as much as possible out of the management and control of a vast population economically and politically subordinated to them.