The First Ten Letters: Secrets of the Universe Hiding in Plain Sight

The First Ten Letters: Secrets of the Universe Hiding in Plain Sight (Mosaica Press, 2022), by Rabbi Raffi Bilek

Reviewed by Rabbi Reuven Chaim Klein (Rachack Review)

Rabbi Raffi Bilek’s captivating work, The First Ten Letters: Secrets of the Universe Hiding in Plain Sight, presents nothing short of a masterfully conceived and elegantly executed program for presenting the foundational tenets of classical Jewish Thought. With remarkable ingenuity, Rabbi Bilek harnesses the very building blocks of the sacred tongue itself – specifically, the first ten letters of the venerable Hebrew alphabet – employing them as a profound heuristic device to vividly illustrate and deeply explore a constellation of absolutely central philosophical and theological principles that lie at the very heart of our timeless tradition.

This is not a mere compilation of ideas; it is a work of profound synthesis and creative pedagogy. Rabbi Bilek adeptly and frequently deploys a rich arsenal of classical exegetical methodologies – including the venerable arts of gematria (numerical equivalence) and intricate orthographic analysis (scrutinizing the form and structure of the letters themselves) – weaving them together with impressive dexterity. Through these methods, he forges compelling and intricate connections, effectively tethering each of these first ten letters to a distinct, indispensable pillar of Jewish hashkafah (“worldview”). His exploration is consistently anchored in and illuminated by a wealth of relevant and authoritative sources, peppered with citations from the Biblical scripture and the profound depths of the Rabbinic tradition. This provides robust textual scaffolding and substantiation for the profound ideas he presents.

Although the core concepts themselves may indeed form the bedrock of discourse within contemporary Jewish educational and outreach (kiruv) circles, Rabbi Bilek’s truly significant and novel contribution resides precisely in the unique and remarkably cohesive framework he constructs. He doesn't merely present these ideas; he intimately roots them in the very essence of the Hebrew language – the sacred letters that constitute its divine DNA.

Consider, for instance: the letter aleph is masterfully linked to the absolute, unwavering concept of Divine Oneness (echad), thereby highlighting the supreme monotheistic creed that stands as the central, defining pillar of Judaism – the belief in a single, utterly unique, and transcendent God. The letter bet, with its inherent duality of form, becomes the perfect symbol for the profound concept of Bechirah Chofshit, “human free will.” Rabbi Bilek eloquently unpacks the Divine rationale behind endowing humanity with this critical choice between good and evil: it establishes human responsibility, making us accountable agents capable of meriting reward (to accrue blessing, brachah for ourselves) or facing consequences for our divinely significant decisions. Similarly, the letter gimmel finds its conceptual counterpart in the active bestowal of kindness (Gomel Chasadim), while the letter tet resonates deeply with the essential quality of inherent tov (“goodness”), and so forth.

Adding a significant layer of accessibility and engaging charm to this profound intellectual structure is one of the book's most distinctive features: its presentation as a continuous narrative. The entire exploration unfolds organically within the framework of a serendipitous encounter – a fictional dialogue between a learned professor and his inquisitive former student who chance upon one another during the course of an extended airplane journey.

This ingenious adoption of a conversational format places Rabbi Bilek firmly within a venerable and highly respected literary lineage within Jewish philosophical exposition. He consciously and effectively follows the illustrious precedent established by towering Torah giants such as Rabbi Yehuda Halevi (in his immortal Kuzari), Rabbi Yosef Irgas, the Ramchal (Rabbi Moshe Chaim Luzzatto), and the late Rabbi Avigdor Miller, all of whom astutely utilized fictional dialogues as a powerful vehicle to convey complex theological and ethical truths. Indeed, this pedagogical genre boasts ancient and noble roots, stretching back to the seminal dialogues penned by philosopher Plato himself (of which all later philosophy is said to be mere footnotes).

Let it be unequivocally stated: discerning readers are not delving into this narrative anticipating intricate plot twists or character development; rather, they are drawn to its unparalleled efficacy as a remarkably clear, refreshingly straightforward, and effortlessly digestible vehicle for presenting the fundamental talking points, the core philosophical underpinnings, of contemporary Orthodox Jewish belief and practice. In this regard, Rabbi Bilek's chosen format is an unmitigated triumph of pedagogical clarity.

This book thus stands as a testament to creative scholarship and pedagogical brilliance. It successfully transforms the abstract shapes of the Aleph-Bet into luminous windows through which the profoundest secrets of the Jewish universe are revealed, truly hiding in plain sight. This work is an invaluable resource for both the newcomer seeking a structured entry point into Jewish thought and the seasoned individual desiring a fresh, letter-based perspective on timeless truths, as well as for educators looking for a new way of presenting the timeless tenets that Jews hold so dear.

Jewish Hungarian Orthodoxy: Piety and Zealotry

 


Jewish Hungarian Orthodoxy: Piety and Zealotry (Routledge, 2024) by Menachem Keren-Kratz

Reviewed by Rabbi Reuven Chaim Klein (Rachack Review)

Like the terms Poland and Lithuania, Hungary in the Jewish historical consciousness is not coterminous with Hungary in the geo-political sense, but rather encompasses a much vaster area than is included in the country known as Hungary. The Hungarian Jewish community of modern times began in earnest in the 1700s, with Jews flocking to the Kingdom of Hungary from many different directions. But as they developed, the Jewish communities in the different parts of Greater Hungary had different flavors: Northwest Hungary (closer to the city of Pressburg, now known as Bratislava) comprised mostly of Jews from Germany. These non-Hasidic Orthodox Jews — whom the author calls “Ashkenazim” in line with the pre-Holocaust nomenclature — followed the lead of Rabbi Moshe Sofer (the Chasam Sofer), who served as the Chief Rabbi and Rosh Yeshiva at Mattersdorf (in modern-day Austria) before assuming the mantle in Pressburg. These Jews differed from the mostly Hasidic communities in the northeast, which were comprised of Jews who mainly came from Galicia. Finally, the Jews in Southern Hungary were more accultured, and that region served as the bastion of the Neolog Jewish community, but was also home to a relatively-small number of Orthodox Jews and communities.

Menachem Keren-Kratz’s Jewish Hungarian Orthodoxy: Piety and Zealotry tackles the complex make-up of Orthodox Judaism within the historical boundaries of "Greater Hungary.” To understand the topic of this book, one must be familiar with the kehillah system that dominated Europe, whereby Jews belonged to semi-autonomous communal organizations to which they paid dues and from whom they received religious and civil services. A crucial development occurred in the mid-19th century, when Austro-Hungarian policy in Hungary allowed for multiple kehillot in one locale. In Neolog-dominated areas, Orthodox Jews often seceded from the official kehillah to form strictly traditional communities adhering to Halacha. Communities refusing alignment with either the Orthodox or Neolog were deemed "Status Quo," and were often ostracized by Extreme Orthodox groups.

This book thus explores the intricate, often fractious relationships and surprising alliances between these communities — Orthodox, Neolog, and Status Quo — both pre-WWI within Greater Hungary and post-WWI after Hungarian Jewry was fractured across new national borders. For example, following the first World War, Maramureș and the rest of Transylvania became part of Romania, Slovakia and the Carpathian Ruthenia became part of Czechoslovakia, the Burgenland became part of Austria, and other pieces of Greater Hungary were annexed to Italy and the newly-created Yugoslavia. Keren-Kratz also details the umbrella organizations representing these communities to the government and notes the frequent disconnect between a kehillah's official stance and the personal practices of its representatives. For example, he made note of the phenomenon of non-observant Jews serving as officials in the Orthodox community.

But more than that, Keren-Kratz focuses on intra-Orthodox conflicts: the friction between non-Hasidic "Ashkenazim" and Hasidim; disputes between Orthodox and Status Quo-affiliated Jews; and even Hasidic secessions forming "Sephardi" communities (called so because the Hasidim pray a kabbalistically-infused form of the Ashkenazi rite known as Nusach Sefard, which is somewhat similar to the Sephardic tradition).

Zionism was another major flashpoint. While Orthodox Jews obviously shunned secular Zionism, pragmatic arrangements with Mizrachi (Religious Zionists) sometimes occurred. Agudas Yisrael, originally non-Zionist but supportive of religious settlement in Palestine, held the mainstream anti-Zionist position pre-1948. Yet, Extreme Orthodox groups in Hungary even rejected Agudah itself as too accommodating. The book tracks how communities navigated this issue, with pragmatism sometimes overriding ideology and — as the author argues was the case regarding the Holocaust — ideology sometimes prevailing over practicality.

The difference between Orthodox Judaism and Neolog Judaism centered on whether one was willing to undertake to continue observing halacha as Jews had traditionally done since time immemorial. While there were always heretical Jews or deviants, Neolog was like a Reform Judaism in its rejection of halacha as an officially binding concept. That essentially made them a non-nomian, and sometimes even an antinomian, movement. The reviewer observes that while the author frames Orthodoxy's rejection of Neolog as innovative, the true novelty lies in a Jewish community officially abandoning traditional Jewish practice yet stubbornly claiming a Jewish identity. Orthodoxy, apart from its necessary response to this new phenomenon, simply maintained the age-old Jewish way of life.

Although one of the common requirements of Orthodox communities was affirming fealty to the dictates of Shulchan Aruch, this book overlooks the nuance that many individuals and rabbis within Neolog communities also remained personally observant (to varying degrees). Non-Hungarian parallels to this sort of traditional Jewish observance that was still in tune with secular (in this case, Hungarian) culture can be seen in German Neo-Orthodoxy (à la Rabbi Samson Raphael Hirsch) or contemporary Modern Orthodoxy, which are totally halachically observant but suffused with (German/American) culture. This stands in stark contrast with the contemporary Reform or Conservative movements that have essentially jettisoned the notion of halacha altogether.

In that vein, the author could have stressed how even in one family, brothers might have been affiliated with different communities, even if their personal level of religiosity were more or less the same. For example, Rabbi Yaakov Koppel Reich served as the Orthodox rabbi of Budapest, while his brother Rabbi Chaim Yehuda Reich was the rabbi of the Neolog community in Bonyhad. Similarly, Rabbi Moshe Blau was a leader of the Agudas Yisrael movement in Jerusalem, while his brother Rabbi Amram Blau was a co-founder of Neturei Karta in Jerusalem. [Speaking of Neturei Karta, this reviewer feels that the author gave too much prominence and weight to a group of organizations that at best represent a handful of families and individuals, most of whom suffer from mental illness. Moreover, that group is not necessary a Hungarian Jewish phenomenon, as Rabbi Amram Blau’s co-founder, Rabbi Aharon Katzenellenbogen, was actually of Litivsh extraction.]

The narrative presented by this book provides accounts of prominent Hungarian rabbis and their activities — for example, it talks about Rabbi Moshe Schick of Chust (who was an “Ashkenazi” Jew who served as the rabbi of a community in Northeast Hungary), Rabbi Yosef Tzvi Dushinsky (rabbinic leader of the Orthodox community in Galanta, before he made aliyah and became the Chief Rabbi of Jerusalem), and Rabbi Chaim Elazar Shapiro of Munkács (an anti-Zionist rabbi who was an important Talmudic scholar and Hassidic Master). The book also gives special attention to the illustrious Teitelbaum dynasty from Sighet/Satmar. They came on to the scene in the late 1700s when Rabbi Moshe Teitelbaum (author of Yismach Moshe) assumed the rabbinate of Ujhely, and reached their peak with their most famous descendant Rabbi Yoel Teitelbaum of Satmar in the late 1900s. In offering these accounts, the author analyzes the political dynamics governing inter-communal relations before and after the post-WWI territorial dismemberment and the rabbis’ roles in those dynamics.

The author presents this history by synthesizing information from many secondary (scholarly) sources, as well as original research from primary sources (through contemporaneous Hungarian Jewish press). These sources are copiously referenced in the endnotes after each chapter. The author focuses more on the political and polemic aspects of this history, but not so much about the ideas. Thus, the book's strength lies in its political and polemical history.

To that end, even though the author discusses the rabbis much, he rarely cites their own works and what they said about their own positions (although the book’s conclusion chapter is somewhat of an exception to this). This reviewer sees it as a significant methodological flaw to not engage with those primary sources written by the rabbis themselves. Engaging with the rabbinic writings themselves could have helped shed light on the nuances of the exact positions taken by those very rabbis it discusses (e.g., Rabbi Moshe Sofer, Rabbi Moshe Schick, Rabi Shaul Bruch, Rabbi Chaim Elazar Shapiro, the Teitelbaums, Rabbi Yekusiel Yehuda Halberstam of Cluj, etc…). These sources, addressing issues like separation from Neolog communities, educational policies, and ideology, are crucial for understanding the rabbis' own positions and motivations. For example, Halachic responsa literature from Hungary deals with questions like to what extent Orthodox Jews ought to separate from Neolog (and Status Quo) Jews, inasmuch as whether, for example, they would need to build a separate mikveh. As this book makes clear, the question of general education was a flashpoint issue, but the author fails to notice that Rabbi Moshe Sofer — the hero of Hungarian Jewry — himself already wrote about when studying the maths and sciences (beyond what it is required for understanding Torah) is appropriate.

It is probably because of this oversight that Keren-Kratz sometimes oversimplifies ideological differences. For instance, he reduces the Orthodox-Neolog schism primarily to disputes over secular education and the knowledge of foreign languages, with the more hardline Orthodox rejecting such liberal educational policies and the Neolog pushing for such policies. While relevant, especially in certain regions, this characterization does not capture the full theological, cultural, and halachic depth of the divide. No doubt the author addresses these issues in greater details in his numerous other articles and books on the subject of Hungarian Orthodoxy, but these issues were not fully fleshed out in this work.

There are also minor historical inaccuracies or misstatements peppered throughout the book. For some quick examples, despite what the book records: Rabbi Bengis’ personal name was Zelig Reuven (not Reuven Zelig), Rabbi Elchanan Wasserman was not from Brisk, Gateshead is not a city, and an eiruv is not symbolic. The author also confuses rabbinic ordination with rabbinic appointment over a certain jurisdiction, but that is just a matter of semantics.

The author frequently speculates, particularly about the motives behind the actions of organizations and rabbis. These unsupported assertions, especially concerning Rabbi Yoel Teitelbaum's supposed political maneuverings/machinations and the motivations behind his moves, are often identifiable by the absence of endnotes or references. Despite sometimes presenting the author’s own opinion as facts, in general, this book is otherwise a reliable work of historical research and should serve as an important resource for future research.

Most of the political moves and community-building detailed in his book was unfortunately rendered moot by the Holocaust, which quickly devastated Hungarian Jewry in a few months in 1944, destroying almost everything that was built. After the war, some Orthodox and Neolog communities were re-established in Hungary, but they never achieved the same glory as pre-war Hungarian Jews, which were but a shell of themselves.

The final chapters of this book discuss how some of what was found amongst Hungarian Jewry was transplanted abroad — mainly, to New York, Israel, England, and Belgium, but also to Montreal, Melbourne, Los Angeles, and elsewhere. The truth is that the discussion in the contemporary context is largely irrelevant because the kehillah structure has all but disappeared nowadays. To that end, contemporary Orthodox Jews tend, for example, to pray in whatever Orthodox synagogue happens to be most convenient for them, regardless of ideology. For instance, when the contemporary Satmar Rebbes vacation in Palm Springs, California, they have no qualms about praying in a Chabad synagogue, despite the wide ideological gaps between Satmar and Chabad.

This book is very personal to me because all four of my grandparents are from Greater Hungary and were native Hungarian speakers. My paternal grandfather was from Munkács in the northeast, my paternal grandmother was from Bonyhád in the south, and my mother’s parents were from the Galanta area near Pressburg. Despite my lifelong interest in Hungarian Orthodoxy, I gained significant new understandings of the complex political dynamics within and between Hungarian Orthodox Jewish communities. While the book provides valuable historical research, particularly on communal politics, its avoidance of primary rabbinic sources and occasional oversimplifications represent missed opportunities for a deeper exploration of the "Piety and Zealotry" promised in its title. Ultimately, Keren-Kratz provides a crucial, detailed map of Hungarian Orthodoxy's fractious political landscape, offering profound insights that helped me contextualize my own family's diverse roots within this complex world.

Jews and the Wine Trade in Medieval Europe: Principles and Pressures

 


Jews and the Wine Trade in Medieval Europe: Principles and Pressures (Littman Library of Jewish Civilization, 2024), by Haym Soloveitchik

Reviewed by Rabbi Reuven Chaim Klein (Rachack Review)

Rabbi Dr. Haym Soloveitchik's Jews and the Wine Trade in Medieval Europe: Principles and Pressures offers a fascinating and top-notch exploration of a critical Halakhic and economic challenge faced by Medieval Ashkenazi Jewry. By Pentateuchal law, wine libated as part of idolatry (yayn nesech) is utterly forbidden. The rabbis further instituted a general prohibition, stam yeinam, forbidding all gentile wine as though it were yayn nesech, driven by concern over habitual pagan libations. As the author makes clear, the rabbis instituted this prohibition because of a concern that gentiles might habitually dabble or flick wine as an idolatrous tribute to their deity. This concern was only in play in a pagan milieu, wherein such habitual libations or libation-like acts of devotion were de regur.

But for the burgeoning Ashkenazi community in Lotharingia (Lotir), the ambient religion was not pagan, but rather Christian, and Christians did not engage in this sort of habitual libation. As Soloveitchik meticulously makes clear, this reality leads to the following puzzle: One might have expected this new reality to lead to a relaxation of the stam yeinam prohibition, especially given the importance and lucrativeness of the wine industry in regions like Germany and France. Instead, the author shows with exceptional clarity that Ashkenazi Jews embraced only minimal leniencies – notably, post facto acceptance of gentile wine as debt payment. Crucially, they refused any leniency allowing a priori engagement in the trade of Christian wine or the employment of gentile workers in Jewish wine production. The big question is why did Ashkenazi Jews in the High Middle Ages not avail themselves of this chance to relax the restrictions of stam yeinam due to the reality that the concerns that led to the original prohibition were no longer in play.

In setting up this question, Soloveitchik demonstrates a clear mastery of Medieval Ashkenazi texts, both printed and manuscript, providing close analysis of Tosafistic and pre-Tosafist sources. This analysis reveals that the early Ashkenazi community consistently adopted the aforementioned stringent position at extreme financial cost, readily sacrificing lucrative economic opportunities.

Dr. Soloveitchik finds their stance perplexing and counterintuitive. This leads to the book's central thesis: the early Ashkenazi Jews’ deep-seated revulsion towards gentile wine can be chalked up to gentile anti-Semitism and the Jews' response to that wretched phenomenon. Drawing on scholar Gavin Langmuir's research tracing the evolution of German anti-Semitism from a "rational" form to an intense, irrational form where Jews themselves were reviled as disgusting, Soloveitchik posits a similar phenomenon occurred in Jewish attitudes. The refusal to relax stam yeinam is understood not as a purely legal position, but as an emotional/social reaction to gentile treatment.

As this book makes clear, the discussion at hand can be viewed as a sort of case study that uses the Soloveitchik's innovative methodology that looks for an "angle of deflection" in the rulings of Jewish jurists before arguing that their conclusions are not purely based on legal reasoning but on other, extralegal factors. In our case, in the author's estimation, the Ashkenazi Jewry's illogical refusal to relax the laws of stam yeinam are understood to not be based on any real legal position but on an emotional/social reaction to how the gentiles treated them. The book is a fascinating case study of this innovative methodology.

In this book, characters like Rashi, Rivan, Rabbeinu Tam, and the Ri of Dampierre come alive as their relevant Talmudic comments and Halakhic responsa are analyzed and broken down. Soloveitchik also discusses the introduction of the idea of stam yeinam as a hedge against intermarriage, how the story of Jewish participation in wine trade directly led to their later roles as moneylenders, and the reception of Geonic rulings in Ashkenaz.

While some parts of this study had been available in English before, this compilation of a lifetime of Soloveitchik's studies is invaluable for the English-reading audience. As can be expected of a scholar of Soloveitchik's renown and lineage, the research is top-notch — thorough and wide-reaching. Some sections are somewhat repetitive, and parts translated from the author's Hebrew originals lack the elegant English prose characteristic of his signature style. Helpful maps illustrate the extent of wine production in the Rhine area and the early cradles of Ashkenaz civilization. Overall, this book is a significant and compelling work illuminating a crucial aspect of Medieval Jewish life and law.

Kabbalah and the Rupture of Modernity: An Existential History of Chabad Hasidism

Kabbalah and the Rupture of Modernity: An Existential History of Chabad Hasidism (Stanford University Press, 2025), by Eli Rubin

Reviewed by Rabbi Reuven Chaim Klein (Rachack Review)

Eli Rubin’s book Kabbalah and the Rupture of Modernity paints a rich intellectual portrait of the Chabad-Lubavitch movement by intertwining a history of the movement with a theological history of the movement’s core ideas. The historical/biographical element primarily follows the lives of Chabad’s seven rebbes, whose collective lifespans cover two and a half centuries from 1745 to 1994. Rather than adopting a reductionist approach — wherein succession disputes and internal developments are chalked up to economic, social, or personality-driven factors — Rubin foregrounds the subtle theological distinctions that shaped the movement. In this way, the history of people/events converges with the history of ideas. In Rubin’s telling, ideas and individuals evolve in concert, and the tensions between them illuminate deeper spiritual commitments rather than surface-level rivalries.

Rubin shows how each of the various rebbes of Chabad had their own unique area(s) of focus and contribution to Chabad thought, with their writings often in conversation with each other over the generations. These transgenerational theological dialogues span from Chabad’s founding figure Rabbi Shneur Zalman of Liadi (1745–1812), known as the Alter Rebbe or Rashaz, all the way to the movement’s seventh and final Rebbe, Rabbi Menachem Mendel Schneersohn (1902–1994), known as Ramash. Rubin’s narrative shows how developments in Chabad thought were inextricably shaped by the broader historical contexts in which they developed, especially the various sets of the circumstances in which Chabad Hassidim and their leaders found themselves from Czarist Russia to Communist Russia to wartime Poland to postwar America.

A recuring concept discussed throughout the book is the idea of tzimtzum, the Lurianic doctrine that God "contracted" Himself to create space for the world. Rubin tracks the way this concept was interpreted and reinterpreted by Chabad thinkers over the generations. Already in the early 18th century, Italian rabbis like Rabbi Immanuel Chai Ricchi (1688–1743) read tzimtzum literally, while Rabbi Yosef Ergas (1685–1730) maintained it must be understood metaphorically. The idea of tzimtzum looms large in the discourses of Rashaz. This is especially true of Rashaz’s work Likkutei Amarim (colloquially known as Tanya), wherein he emphatically taught that tzimtzum must be understood non-literally, and he preached the idea that God’s presence continues to permeate all of creation such that there is no space that is free of Him. This non-literal view of tzimtzum became a hallmark of Chabad theology.

This interpretation was not without controversy. The Misnagdim (opponents of Hasidism, often derisively called “Snags” by those in the Chabad community), led by the Vilna Gaon (1720–1797), championed a literal reading of tzimtzum, viewing the Chabad position as dangerously close to pantheism — or even heresy, in the manner of Baruch Spinoza. Indeed, Rashaz’s view that God did not actually constrict Himself to create the world heavily suggests that the world must then be a part of God. Contemporary scholars like Rachel Elior have interpreted Tanya as promoting a kind of acosmism — the notion that the world does not exist as an ontological reality independent God. [Curiously, the author does not engage with the recent work of contemporary philosopher Sam Lebens, who actually finds the acosmic view that the world only exists as an idea in God’s mind (what he dubs “Extreme Hasidic Idealism”) quite compelling.]

In pushing back against these criticisms of Rashaz, Rubin follows Elliot Wolfson in distinguishing between Spinoza’s pantheism that represents a secularization of the divine, and Chabad’s “divinization of nature.” In this theological framework, God is indeed everywhere, but human beings must find Him and make His presence more palpable through mitzvah observance and Torah study — acts that induce a sort of effacement whereby one re-enters in rapture with the omnipresent deity (whose absence in the material world is only metaphorical, but not ontological/metaphysical). Performing such “good deeds” dissolve the ego and allow one to reunite with the omnipresent divine (the apotheosis of action). According to this reading, the point of tzimtzum is not a rupture by which God intends to separate Himself from His creation, but it is rather an illusion of Divine concealment that invites human agency and longing for the Divine. The author shows how this theology is not only explicit in later expositors of Tanya (most prominently, Rashaz’s descendants and successors), but can be gleaned from close readings of Rashaz’s works themselves.

Besides for delving into the intricacies of the content of Chabad theology, this book also highlights the different modalities that the various rebbes used to relay and broadcast those ideas to a wider audience: verbal discourses (sichos), transcribed talks (maamarim), glosses and reworkings of earlier Chabad works (hagahos), multipartite discourses (hemshech), epistolatory missives (iggros), and institution-building (i.e., founding Yeshivas and dispatching emissaries). Each rebbe had his own distinctive style and approach to spreading Chabad ideology, whether more inwardly focused or outward-looking, ascetic or worldly, conciliatory or polemical.

Among the more intriguing chapters is Rubin’s discussion of the fifth Rebbe, Rashab (Rabbi Sholom Dovber Schneersohn, 1860–1920), and his reputed encounter with Sigmund Freud in Vienna — a moment that hints at surprising intellectual affinities between Hasidic introspection and psychoanalytic method. Rubin also delves into Kabbalistic ideas such as reshimu (the “trace” of Divine light left behind from before tzimtzum) and the Chabad perspectives on the nature of materialism.

The book culminates with a treatment of Ramash, Rabbi Menachem Mendel Schneerson, the late seventh rebbe, who was both a direct descendant of Rashaz and the son-in-law of his predecessor, the sixth rebbe Rayatz (Rabbi Yosef Yitzchak Schneersohn, 1880–1950). With university training in science and engineering, Ramash was said to have introduced a scientific-like aspect of synthesis to Chabad theology in his efforts to bridge gaps between disparate views. As Rubin shows, Ramash was the first rebbe in the movement to entertain Rabbi Irgas’ literal reading of tzimtzum — not as a repudiation of the traditional Chabad view, but as a complementary perspective that could, after a fashion, be harmonized with Rashaz’s non-literal understanding. In so doing, the Lubavitcher Rebbe sought to resolve centuries-old disputes between Hasidim and Misnagdim. Rubin further contrasts Ramash’s new look at the future redemption with his direct predecessor’s: Ramash focused his Messianic vision by looking towards an idealistic future, whereas the previous rebbe Rayatz sought out a redemptive model by looking back at an idealized past.

While Rubin’s focus is squarely on Chabad, readers should be aware that this is not a survey of Hasidism in general. Foundational ideas from other Hasidic works — such as Noam Elimelech, Kedushas Levi, and Me’or Einayim — are entirely absent from the discussion, but this is consistent with internal Chabad usage, wherein the term “Chassidus” refers exclusively to Chabad teachings. In fact, this book presents Chabad literature as mostly internal, and only very seldomly looking to the broader works of Jewish literature. For instance, the only reference to Jewish Medieval thought in this book is when the fourth rebbe of Chabad Maharash (Rabbi Shmuel Schneersohn, 1834–1882) cited from Ibn Gabbai in the name of R. Azriel of Gerona (in addition to Ramash’s special interest in Maimonides, which is a later, 20th century development in Chabad discourse).

Although Rubin occasionally touches on some of the splinter groups that broke off and rejoined Chabad (like Strashelye and Kopust), he largely sidesteps the more contentious aspects of later Chabad history (such as the anti-Zionist Malachim, the Gur-Aryeh controversy, or the Liozne Rebbe’s claim to succeeding Ramash). Similarly, he refrains from in-depth discussions of external polemics, such as disputes that Ramash had with important non-Hasidic leaders like Rabbi Aharon Kotler or Rabbi Elazar Menachem Shach.

In this, the book largely follows the official historiography of institutional Chabad. This should not come as a surprise because the author himself is personally very much a part of the Chabad community as an insider, besides having earned his academic credentials with a PhD from the department of Hebrew and Jewish Studies at UCL. As befits a person of such dual personality, his sources (as copiously detailed in the book’s endnotes) include both scholarly works from the halls of academia, as well as close readings of classical Chabad works.

This is a dense and intellectually-demanding volume, laden with technical kabbalistic and academic terminology. It is not a light read, and at times the arguments may elude non-specialists. This reviewer freely admits that he did not quite follow all the deep intricacies and nuances discussed. The addition of in-text cross-references or summaries might have helped the reader keep track of the different ideas swirling around, although the index does a decent job of helping the reader find specific points. Overall, this book is a compelling and interesting read that is sure to be a useful resource on Chabad theology in academic circles for years to come.