Except that the empires raised by the peoples of the age were not solely of this earth. Radiant though a Caesar might appear to his subjects, awesomely though his palaces and citadels might tower above the common run, and remorselessly though his array of soldiers, and bureaucrats, and tax-collectors might serve his will, yet even he was merely a mortal, in a cosmos governed by a celestial king. There was only one universal monarch—and that was God. This presumption, by the time that Yusuf was brought to bay early in the sixth century AD, was one virtually unchallenged across the entire sweep of the Near East—and it affected almost every aspect of geopolitics in the region. When Yusuf clashed with the Ethiopian invaders, far more was at stake than the petty ambitions of squabbling warlords. The interests of heaven as well had been intimately involved. Between those fighting in the Jewish cause and those in the name of Christ, the differences were so profound as to be irreconcilable. Confident though both sides were that the god they worshipped was the only god—monos theos in Greek—this shared conviction only rendered them all the more implacably opposed. Not just in southern Arabia, but across the entire span of the civilised world, devotion to a particular understanding of the divine had become an emotion that defined the lives of millions upon millions of people. In an age when realms might crest and fall like the spume of a wave, and even great empires totter, there was certainly no earthly power that could command such allegiance. Identity was coming to be defined, not by the kingdoms of this world, but by various conceptions of the One, the Only God: by “monotheisms.”
This development signalled a transformation of human society with incalculable consequences for the future. Of all the various features of the modern world that can be traced back to antiquity—alphabets, democracy, gladiator films—none, perhaps, has been more globally influential than the establishment, for the first time in history, of various brands of monotheism as state religions. At the start of the third millennium since the birth of Christ, some three and a half billion people—over half the population of the world—identify themselves with one or other of the various religions that assumed something approaching their modern form in the 250 years either side of Yusuf’s death. The period of late antiquity, then, unfamiliar though it may be in comparison to other epochs of history, is no less pregnant with relevance for that. Wherever men or women are inspired by a belief in a single god to think or to behave in a certain way, they demonstrate its abiding influence. The impact of the revolution that it witnessed still reverberates today.
It is the ambition of this book to trace the origins and the progress of that same revolution. How was it that the patterns of people’s thought, over the course of only a few centuries, came to be altered so radically and so enduringly? The story is a richly human one, replete with vivid drama, extraordinary characters and often riotous colour. Yet, it is also one that imposes peculiar demands upon the historian: for much of it takes place in a dimension beyond the physical. It features kings, but also angels; warlords, but also demons. Consequently, not every event in the pages that follow can be explained purely in terms of material self-interest or political calculation. Shadowing the often brutally vivid world of mortal affairs is a dimension that is heaven-lit and damnation-haunted. Certainly, when Yusuf’s contemporaries analysed his downfall, they were not naïve in their analysis. They recognised that complex issues of trade policy and the rivalries of the two distant superpowers had been lurking in the background. Yet they never doubted that the sands of Arabia had become the stage for an authentically celestial drama. The forces of heaven and hell had met and clashed. It was a matter of opinion whether Yusuf was on the side of the angels or the demons; but neither Jews nor Christians had any doubt that what had happened had derived ultimately from God. This was the core presumption of the age; and a history of late antiquity that neglects to pay due acknowledgement to it is a history that has failed.
The beliefs of the period must therefore be treated with both seriousness and empathy. Yet this does not mean that their claims should be taken wholly at face value. Back in the early fourth century, a Palestinian bishop by the name of Eusebius wrote a history of the early Church. In it, he initiated a tradition of historical enquiry that explained the past as the tracing of patterns upon time by the forefinger of God. This presumption, although stupendously influential, and not merely among Christian authors, fell out of fashion in the West several centuries ago. Whatever their personal religious convictions may be, modern historians do not generally explain past events as the workings of divine providence. All aspects of human society—even beliefs themselves—are now presumed to be products of evolution. Nor is this a uniquely modern perspective. Eusebius himself, fifteen hundred years before Darwin, had recognised in it a pernicious and peculiarly threatening heresy. Nothing was more alarming to him than the notion propagated by the enemies of his faith that it was something upstart and contingent, a mere distorted echo of more venerable traditions. His history, far from tracing changes in the doctrines and institutions of the Church, aimed to demonstrate that they had never changed in the slightest. And Christianity itself? Christianity, Eusebius presumed, had existed since the dawn of time: “For, obviously, we must regard the religion proclaimed in recent years to every nation through Christ’s teaching as none other than the first, the most ancient, and the most primitive of religions.”6
To many of us today, familiar as we are with Neanderthal burial sites and Cro-Magnon cave art, this claim does not seem obvious at all. Nevertheless, its underlying presumption—that religions have some mysterious and fundamental essence, immune to the processes of time—remains widely taken for granted. In large part, this is due to Eusebius and others like him. The great innovation of late antiquity was to fashion, out of what might otherwise have been an inchoate blur of beliefs and doctrines, individual templates for individual religions, and then to establish them as definitive. How this was accomplished is a fascinating and remarkable tale—for it touches upon the highest politics and the profoundest human emotions. The clash of great empires and the wretchedness of slaves; the shimmering of mosaics and the stench of plague pits; the clamour of teeming cities and the silence of empty deserts: all must feature. Beginning in a world recognisably ancient and ending in one medieval, it ranks as a transformation as momentous as any in history.
Yet the story is, for all that, a treacherous one to tell. Partly, this is due to the inevitable gaps and contradictions in the sources that bedevil all periods of ancient history. Take, for example, the story of Yusuf’s death. There are some accounts which describe him as falling in the heat of battle, rather than riding out into the sea. More problematic still is the bias in our sources—almost all of which are Christian.a Even the chronology is a muddle, with some historians dating Yusuf’s death, not to 525, but to 520. All these, it might be thought, are mere problems of detail—except that there is an additional, and much greater, complication. Any history tracing the development of rival monotheisms cannot help but use such words as “Christian” and “Jew”; and yet, as the story of Yusuf suggests, these did not necessarily mean in late antiquity what they have come to mean today. A narrative that features the persecution of veiled Christian women in Arabia by a Jewish king is clearly one set in a world at some remove from our own.