The City of God stands as Augustine's masterwork of theological defense and construction, written over thirteen years in response to accusations that Christianity brought ruin upon Rome. This first volume contains the first ten books of sustained refutation—demolishing pagan claims that traditional worship secured either temporal prosperity or eternal happiness—followed by the beginning of his positive vision in Books Eleven through Thirteen, where he traces the origin of two societal orders to the primordial division among the angels. What emerges is not merely an apology for Christianity but a philosophy of history that subordinate the fate of empires to the hidden providence of the one true God, whose sovereignty extends from creation through the fall to the final judgment.
With the machinery of cosmic repetition dismantled, Augustine turns positive. Nothing prohibits the eternal God from bringing into being what has never existed before, and doing so without the slightest shift in His purpose. Consider the company of the redeemed: whether their total number grows without bound or is fixed from the outset, in either case there was a moment when that number did not yet exist. A definite total, once reached, implies a point at which the count began; and for that beginning to occur, a single progenitor was required—the first human being.
Augustine then asks why that progenitor was one rather than many. Among the lesser creatures, God produced some species inclined toward solitude—eagles, lions, wolves—and others drawn to flock together—doves, deer—yet each kind was brought forth in groups. The human animal, poised between angelic and bestial life, was given a different origin: one individual alone, so that the entire species might recognize in its shared descent a powerful incentive toward social harmony and familial love. The woman was fashioned from the man’s own body to reinforce the same lesson, pressing home the truth that all humankind draws from a single wellspring.
God was not ignorant of what would follow. He knew that the creature endowed with free choice would rebel, becoming subject to death and transmitting mortality to his offspring. The result would be a race so fractured by conflict that even beasts—though made in numbers from earth and water—live more peaceably among their own kind than human beings do among theirs. Yet divine foreknowledge also encompassed the great multitude that grace would call to adoption, justifying them through the forgiveness of sins and uniting them with the holy angels in unending peace, once death itself had been destroyed. And that diverse company of the saved would derive lasting benefit from recalling their common ancestry, seeing in it how highly God esteems unity amid multiplicity.
Turning to the constitution of the human person, Augustine insists that the rational and intellectual soul marks humanity as the earthly creature most resembling its Maker, surpassing all other animals of land, air, and sea. How God imparted this soul—whether He first fashioned it and then breathed it into the body, or produced it through the very act of breathing—is less important than recognizing that the manner of divine working utterly transcends ordinary craftsmanship. The Almighty does not manipulate pre-existing materials with physical tools; His power is His hand, operating invisibly to accomplish visible results. Those who judge the original acts of creation incredible because they fall outside routine experience should reflect that ordinary human generation, conception and birth, would sound equally implausible to anyone who had never witnessed it.
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