The title of David Nirenberg’s new book, Anti-Judaism: The Western Tradition, uses a term pointedly different from the one we are used to. The hatred and oppression of Jews has been known since the late 19th century as anti-Semitism—a label, it is worth remembering, originally worn with pride by German Jew-haters. What is the difference, then, between anti-Semitism and anti-Judaism? The answer, as it unfolds in Nirenberg’s scholarly tour de force, could be summarized this way: Anti-Semitism needs actual Jews to persecute; anti-Judaism can flourish perfectly well without them, since its target is not a group of people but an idea.Nirenberg’s thesis is that this idea of Judaism, which bears only a passing resemblance to Judaism as practiced and lived by Jews, has been at the very center of Western civilization since the beginning. From Ptolemaic Egypt to early Christianity, from the Catholic Middle Ages to the Protestant Reformation, from the Enlightenment to fascism, whenever the West has wanted to define everything it is not—when it wants to put a name to its deepest fears and aversions—Judaism has been the name that came most easily to hand. “Anti-Judaism,” Nirenberg summarizes, “should not be understood as some archaic or irrational closet in the vast edifices of Western thought. It was rather one of the basic tools with which that edifice was constructed.”This is a pretty depressing conclusion, especially for Jews destined to live inside that edifice; but the intellectual journey Nirenberg takes to get there is exhilarating. Each chapter of “Anti-Judaism” is devoted to an era in Western history and the particular kinds of anti-Judaism it fostered. Few if any of these moments are new discoveries; indeed, Nirenberg’s whole argument is that certain types of anti-Judaism are so central to Western culture that we take them for granted. What Nirenberg has done is to connect these varieties of anti-Judaism into a convincing narrative, working with original sources to draw out the full implications of seminal anti-Jewish writings.The main reason why Judaism, and therefore anti-Judaism, have been so central to Western culture is, of course, Christianity. But Nirenberg’s first chapter shows that some persistent anti-Jewish tropes predate Jesus by hundreds of years. The Greek historian Hecataeus of Abdera, writing around 320 BCE, recorded an Egyptian tradition that inverts the familiar Exodus story. In this version, the Hebrews did not escape from Egypt but were expelled as an undesirable element, “strangers dwelling in their midst and practicing different rites.” These exiles settled in Judea under the leadership of Moses, who instituted for them “an unsocial and intolerant mode of life.” Already, Nirenberg observes, we can detect “what would become a fundamental concept of anti-Judaism—Jewish misanthropy.” This element was emphasized by a somewhat later writer, an Egyptian priest named Manetho, who described the Exodus as the revolt of an impious group of “lepers and other unclean people.”As he will do throughout the book, Nirenberg describes these anti-Jewish texts not in a spirit of outrage or condemnation, but rather of inquiry. The question they raise is not whether the ancient Israelites were “really” lepers, but rather, why later Egyptian writers claimed they were. What sort of intellectual work did anti-Judaism perform in this particular culture? To answer the question, Nirenberg examines the deep history of Egypt, showing how ruptures caused by foreign invasion and religious innovation came to be associated with the Jews. Then he discusses the politics of Hellenistic Egypt, in which a large Jewish population was sandwiched uneasily between the Greek elite and the Egyptian masses. In a pattern that would be often repeated, this middle position left the Jews open to hostility from both sides, which would erupt into frequent riots and massacres. In the long term, Nirenberg writes, “the characteristics of misanthropy, impiety, lawlessness, and universal enmity that ancient Egypt assigned to Moses and his people would remain available to later millennia: a tradition made venerable by antiquity, to be forgotten, rediscovered, and put to new uses by later generations of apologists and historians.”With his chapters on Saint Paul and the early church, Nirenberg begins to navigate the headwaters of European anti-Judaism. Paul, whose epistles instructed small Christian communities in the Near East on points of behavior and doctrine, was writing at a time when Christianity was still primarily a Jewish movement. In his desire to emphasize the newness of his faith, and the rupture with Judaism that Jesus Christ represented, he cast the two religions as a series of oppositions. Where Jews read scripture according to the “letter,” the literal meaning, Christians read it according to the “spirit,” as an allegory predicting the coming of Christ. Likewise, where Jews obeyed traditional laws, Christians were liberated from them by faith in Christ—which explained why Gentile converts to Christianity did not need to follow Jewish practices like circumcision. To “Judaize,” to use a word Paul coined, meant to be a prisoner of this world, to believe in the visible rather than the invisible, the superficial appearance rather than the true meaning, law rather than love. More than a theological error, Judaism was an error in perception and cognition, a fundamentally wrong way of being in the world.The problem, as Nirenberg argues in the richest sections of his book, is that this is an error to which Christians themselves are highly prone. Paul and the early Christians lived in the expectation of the imminent end of the world, the return of Christ, and the establishment of the new Jerusalem. As the end kept on not coming, it became necessary to construct a Christian way of living in this world. But this meant that Christians would have need of law and letter, too, that they would need to “Judaize” to some degree.Continue reading: The power of ‘Judaism’That is why the theological debates in the early church, leading up to Saint Augustine, were often cast as arguments about Judaizing. Marcion, a 2nd-century-CE heretic, followed Paul’s denigration of “the letter” to the point of discarding the entire Old Testament (as the Hebrew Bible was now known); to keep reading Jewish scriptures was to miss the point of Christ’s radical newness. On the other hand, Justin Martyr, Marcion’s orthodox opponent, believed that this reduction of the Old Testament to its merely literal content was itself a way of repeating a “Jewish” error. In other words, both Marcion and Justin each accused the other of Judaizing, of reading and thinking like a Jew. This, too, would become a pattern for subsequent Christian (and post-Christian) history: If Judaism was an error, every error could potentially be thought of as Jewish. “This struggle to control the power of ‘Judaism,’ ” Nirenberg writes, “will turn out to be one of the most persistent and explosive themes of Christian political theology, from the Middle Ages to Modernity.”With the rise of Catholic polities in the Middle Ages, anti-Judaism took on a less theological, more material cast. In countries like England, France, and Germany, the Jews held a unique legal status as the king’s “servants” or “slaves,” which put them outside the usual chain of feudal relationships. This allowed Jews to play a much-needed but widely loathed role in finance and taxation, while also demonstrating the unique power of the monarch. The claim of the Capet dynasty to be kings of France, Nirenberg shows, rested in part on their claim to control the status of the Jews, a royal prerogative and a lucrative one: King after king plundered “his” Jews when in need of cash. At the same time, being the public face of royal power left the Jews exposed to the hatred of the people at large. Riots against Jews and ritual murder accusations became popular ways of demonstrating dissatisfaction with the government. When medieval subjects wanted to protest against their rulers, they would often accuse the king of being in league with the Jews, or even a Jew himself.Accusations of Jewishness have little to do with actual JewsThe common thread in Anti-Judaism is that such accusations of Jewishness have little to do with actual Jews. They are a product of a Gentile discourse, in which Christians argue with other Christians by accusing them of Judaism. The same principle holds true in Nirenberg’s fascinating later chapters. When Martin Luther rebelled against Catholicism, he attacked the church’s “legalistic understanding of God’s justice” as Jewish: “In this sense the Roman church had become more ‘Jewish’ than the Jews.” When the Puritan revolutionaries in the English Civil War thought about the ideal constitution for the state, they looked to the ancient Israelite commonwealth as described in Judges and Kings.Surprisingly, Nirenberg shows, the decline of religion in Europe and the rise of the Enlightenment did little to change the rhetoric of anti-Judaism. Voltaire, Kant, and Hegel all used Judaism as a figure for what they wanted to overcome—superstition, legalistic morality, the dead past. Finally, in a brief concluding chapter on the 19th century and after, Nirenberg shows how Marx recapitulated ancient anti-Jewish tropes when he conceived of communist revolution as “the emancipation of mankind from Judaism”—that is, from money and commerce and social alienation. And this is not to mention some of Nirenberg’s most striking chapters, including one on the role of Judaism in early Islam and one devoted to a close reading of Shakespeare’s The Merchant of Venice.Nirenberg has a sure grasp of a huge variety of historical and intellectual contexts, and, unlike many historians, he is able to write elegantly and clearly about complex topics. Not until the very end of Anti-Judaism does he touch, obliquely, on the question of what this ancient intellectual tradition means for Jews today. But as he suggests, the genealogy that connects contemporary anti-Zionism with traditional anti-Judaism is clear: “We live in an age in which millions of people are exposed daily to some variant of the argument that the challenges of the world they live in are best explained in terms of ‘Israel.’ ” For all the progress the world has made since the Holocaust in thinking rationally about Jews and Judaism, the story Nirenberg has to tell is not over. Anyone who wants to understand the challenges of thinking and living as a Jew in a non-Jewish culture should read Anti-Judaism.***Like this article? Sign up for our Daily Digest to get Tablet Magazine’s new content in your inbox each morning.Adam Kirsch is a poet and literary critic, whose books include The People and the Books: 18 Classics of Jewish Literature.