2. From college to field: International adjudication as a site of struggle

Much has changed since Oscar Schachter coined the famous metaphor of an ‘invisible college of international lawyers’. As originally formulated in the 1970s, the notion referred to an élite of academics hailing from the most prestigious law schools of Europe and the Americas, as well as a handful of statesmen who maintained ‘contact with the scholarly side of the profession’. ^{Footnote 25} According to Schachter, the college was devoted to the ‘common intellectual enterprise’ of promoting international law as a unified discipline across state borders. ^{Footnote 26} Its members often pursued both national and international careers, thus valorizing their knowledge ‘in more places’ and deploying ‘double (or even triple) strategies’ from their multiple social positions.Footnote ²⁷

Some 50 years later, this idyllic image is thoroughly outdated. The college, if it ever existed, has given way to a full-blown profession that attracts ever-growing numbers of individuals and institutions. International regulation has exploded in scope and reach. What once was ‘a thin net of rules’ has evolved into a multi-layered set of norms covering most aspects of political, economic, and social life. Today, we find international ‘law and regulation and rule at every turn’. ^{Footnote 28} The thickening of the system’s ‘normative density’ has resulted in a proportional increase in the ‘institutional density necessary to sustain the norms’. ^{Footnote 29} International organizations have proliferated; state governments have established departments tasked with handling international legal affairs; and a wide array of new actors – politicians, civil servants, military commanders, multinational corporations, advocacy networks, and journalists – have become conversant in the vernacular of the discipline. ^{Footnote 30}

The broadening of the profession has coincided with its diversification and specialization. Unlike the members of the invisible college, who were raised in domestic legal traditions and turned to the field of international law late in their careers,Footnote ³¹ modern-day professionals are often ‘purebred’ international lawyers who acquire their ‘credentials’ and earnings mainly through activities in a cosmopolitan, delocalized socio-professional space.Footnote ³² Over time, their palimpsest of expert knowledges has grown more structured, technical, and differentiated, on par with that of domestic law specialists. Hence, if yesteryear’s international law was ‘a tradition and a political project’, ^{Footnote 33} today’s international law is also a business and a set of career paths.

But while international legal actors are now aplenty, only a few are involved in the judicial settlement of international disputes. In fact, adjudication traditionally accounted for a minuscule portion of international legal practice. For the best part of the twentieth century, the Permanent Court of International Justice and its successor, the ICJ, remained the only state-to-state courts, each issuing no more than a couple of decisions per year. The professionals orbiting around those institutions were few and far between. To this day, ‘only a tiny percentage’ of international disputes end up before a judge. The vast majority ‘are still resolved the old-fashioned way: through diplomacy behind closed doors if we are lucky, through more confrontational and even violent forms when we are not’. ^{Footnote 34}

Yet, the proliferation of international courts and tribunals in the aftermath of the Cold War did cause a gradual shift in focus across the discipline. That was the moment when international law entered its ‘post-ontological era’, ^{Footnote 35} that is when its existence, effectiveness, and ‘lawness’ ceased to be questioned. At last, the system had teeth. Finally, international lawyers could focus on ‘real law’, real cases, and real judges. ^{Footnote 36} The ‘new terrain’ ^{Footnote 37} of international adjudication saw the multiplication of treatises systematizing the case law of the various courts, evaluating the quality and rigour of their reasoning, and dissecting a variety of jurisdictional and procedural matters. ^{Footnote 38} Judicial interpretation suddenly became the obsession of the discipline, playing out as ‘the functional equivalent of truth’ in international legal discourse. ^{Footnote 39}

Amid these developments, a group of international lawyers sought to differentiate themselves from their peers and specialize in the various aspects of international litigation. Relying on international law as background knowledge, they mastered the procedures of the different courts and tribunals and honed their skills in the art of judicial persuasion. Contrary to a purely functionalist view, these experts were not passive ‘operators’ of the emergent system, but active ‘entrepreneurs’Footnote ⁴⁰ who reached out to public officials and private entities that may be interested in resorting to adjudication or arbitration to settle their differences. If many sovereign states have gradually overcome their traditional reluctance towards international courts, it is not only because of their purported commitment to the rule of law, ^{Footnote 41} but also because of their increased exposure to an increasingly global legal service market.Footnote ⁴² Lawyers ‘created’ clients as often as clients ‘created’ lawyers. ^{Footnote 43}

Since its debut, this international judicial community has risen to prominence and prestige within the profession. Fifty years ago, if you had asked a young international lawyer about their ambitions, they would probably have pointed to the United Nations Office of Legal Affairs or the International Law Commission; today, they are as likely to indicate the ICJ, the ECtHR, or the WTO dispute settlement system as ideal duty stations.Footnote ⁴⁴ Back then, private practitioners would lament a lack of business opportunities in international dispute settlement; today, they can comfortably list the many law firms that have set up dedicated offices in the strategic hubs of the system.Footnote ⁴⁵ Universities would treat international judicial practice and procedure as an appendix to their curricula; today, they offer a wealth of specialized courses on the topic. Researchers would typically write about substantive rules and principles of international law, often acknowledging their aspirational character; today, they turn their attention to ‘what courts have actually decided’. ^{Footnote 46}

As a result, nowadays many commentators place adjudication ‘at the centre of the world of the professional international lawyer’ ^{Footnote 47} and, by extension, consider the international judicial community as the innermost circle of that world – that which inhabits the immediate vicinity of the centre.Footnote ⁴⁸ Whether real or imagined, the perceived ‘centrality’ of courts and tribunals has made them the object of keen academic scrutiny, sometimes bordering on the obsessive.Footnote ⁴⁹

Indeed, in recent years, numerous authors have deployed various socio-legal concepts to delineate the community and understand the features that unite its participants. For instance, some resort to the notion of ‘epistemic community’, first described by Peter Haas as ‘a network of professionals with recognized expertise and competence in a particular domain and an authoritative claim to policy-relevant knowledge within that domain’. ^{Footnote 50} These studies focus, inter alia, on how the collective values, worldviews, and argumentative techniques of the community contribute to international judicial discourse.Footnote ⁵¹ Others borrow from Stanley Fish’s work on ‘interpretive communities’Footnote ⁵² to explore the communicative interactions underlying the interpretation of international rules.Footnote ⁵³ Moving from the premise that the meaning of words resides in their use in language, ^{Footnote 54} these works show that the persuasiveness of legal interpretation does not stem from the inherent properties of the text to be interpreted, but from the categories of understanding, the ways of organizing experience, and the stipulations of (ir)relevance shared by the community tasked with interpreting that text. ^{Footnote 55} Thus conceived, interpretation becomes ‘an act of authority dependent on its ability to induce acceptance by way of argument or persuasion’. ^{Footnote 56}

For all its lucidity and insight, this literature leaves several questions unaddressed. The emphasis on the ‘normative and principled beliefs’ and the ‘common policy enterprise’Footnote ⁵⁷ pursued by the community tends to overplay the degree of its cohesiveness and make its participants ‘seem more similar to each other than they really are’.Footnote ⁵⁸ Moreover, the socially constructed nature of interpretive and argumentative postures is often analysed in isolation from the individual agents who adopt those postures, their competing positions within the community, the structures in which they operate, and the conflicts that pit them against one another. In other words, the ideational features of the community are frequently divorced from the ‘differences and contradictions’Footnote ⁵⁹ that characterize its ‘social and material activity’. ^{Footnote 60}

In the remainder of this article, I seek to fill these gaps by reappraising the international judicial community as a space of socio-professional struggle and reflecting on how its conflictive dynamics affect the practices of international courts and tribunals.

Rather than a cohesive entity, I view the community as a juridical field, famously defined by Bourdieu as ‘the site of a competition for monopoly of the right to determine the law’.Footnote ⁶¹ That competition occurs ‘among actors possessing a technical competence which is inevitably social’, and which consists in the ‘socially recognized capacity to interpret a corpus of texts sanctifying a correct or legitimized vision of the social world’.Footnote ⁶² Simply put, to apply a Bourdieusian lens to the community is to explore the material and symbolic conditions under which its members strive to ‘advance their interests’ both within their social field and in relation to other, competing fields.Footnote ⁶³

A brief overview of the core concepts of field theory can help elucidate the task. First, the object of the contest among community members – the ‘economy’ of the juridical fieldFootnote ⁶⁴ – is to appropriate the symbolic power necessary to impose one’s conception of the law as the dominant paradigm across the community. Symbolic power, in Bourdieu’s words, is the power to transform the world ‘by transforming the words for naming it, by producing new categories of perception and judgment, and by dictating a new vision of social divisions and distributions’. ^{Footnote 65} The views that emerge victorious from this symbolic struggle gain the force of ‘universality and neutrality’,Footnote ⁶⁶ thereby creating ‘not only the field’s logic and taken for granted limits (doxa) but also its consecration mechanisms’.Footnote ⁶⁷ In other words, once established, the prevailing paradigm obscures ‘the various battles and processes’ that led to its emergence and naturalizes the social dominance of those who espouse it.Footnote ⁶⁸

Second, the actors taking part in the contest possess, accumulate, and deploy various ‘species of power’, or ‘capital’,Footnote ⁶⁹ which can be converted into one another under certain conditionsFootnote ⁷⁰ and whose relative value is varies across time and fields. Economic capital, for instance, refers to the set of material assets that are ‘immediately and directly convertible into money and may be institutionalized in the form of property rights’.Footnote ⁷¹ Cultural capital designates the ‘instruments for the appropriation of symbolic wealth socially designated as worthy of being sought and possessed’.Footnote ⁷² It can be ‘institutionalized in the form of educational qualifications’,Footnote ⁷³ but also projected informally through perceptions of competence, knowledge, taste, manners, and the like. Finally, social capital is ‘the aggregate of the actual or potential resources’ linked to ‘institutionalised relationships of mutual acquaintance and recognition’. ^{Footnote 74} This, essentially, is the kind of capital that derives from recognition within a group and possession of the credentials that allow participation in its activities.

The amount and composition of each actor’s capital determines her ‘relative force in the game’ and ‘the moves she makes’.Footnote ⁷⁵ It follows that the field can be understood as ‘a network, or a configuration, of objective relations between positions’.Footnote ⁷⁶ Those positions can never be reduced to technical arguments or abstract opinions. Instead, they are objectively and historically defined, in their existence and in the determinations they impose upon the agents, by their ‘present and potential situation’ in the ‘structure of the distribution of … capital’, whose possession ‘commands access to the specific profits that are at stake in the field, as well as by their objective relation to other positions (domination, subordination, homology, etc.)’.Footnote ⁷⁷

Crucially, these notions enable an analysis of the international judicial community both in its external relations with competing social fields and in the internal structures that govern the interactions among its members.

Externally, fields are not ‘contained or closed entities’ with fixed boundaries, but rather ‘spaces of practices that remain in competition with other fields’. ^{Footnote 78} Indeed, the membrane that separates the outside and the inside of the community is rather porous. Many of its participants cross it back and forth during the course of their careers, and maintain some ‘interrelationship with social forces other than those immediately at stake only in the microcosm of law’. ^{Footnote 79} At the same time, the community is grounded on ‘a logic and a necessity that are specific and irreducible to those that regulate other fields’.Footnote ⁸⁰ Its members share a ‘collective interest’ in policing the borders of the community against external interference and ‘in publicly presenting a more fixed and coherent profession of law’ ^{Footnote 81} than that which emerges from their inner confrontations.

Internally, the struggles of the community are simultaneously geared towards the perpetuation of existing arrangements and towards ‘questioning and redefining social hierarchies and power’.Footnote ⁸² On the one hand, socialization and repeated interaction generate a system of ‘durable, transposable dispositions’, called ‘habitus’,Footnote ⁸³ which is internalized by each agent in the field and guides their behaviour both consciously and unconsciously. Habitus produces recursive practices, rituals, and representations which are ‘always tending to reproduce the objective structures of which they are the product’.Footnote ⁸⁴ On the other hand, the ever-shifting distribution of capital that results from the competition among community members means that its habitus and social structures remain open to contestation, renegotiation, and restructuring.

The interplay between stability and change in community dynamics has a profound impact on the routine practices of international adjudication. The notion of practice has itself become the object of a renewed scholarly interest. In recent years, several theorists have developed on Bourdieu’s works to appraise social practices as ‘an actual, contingent, evolving and productive set of activities’. ^{Footnote 85} Those activities are informed by ‘symbolic structures of knowledge’ that ‘enable and constrain the agents to interpret the world according to certain forms, and to behave in corresponding ways’. ^{Footnote 86} In turn, the structures are not dictated only by official discourse or peremptory commands, but rather encompass ‘the explicit and the tacit’; ‘what is said and what is left unsaid’; ‘what is represented and what is assumed’; the ‘language, tools, documents … regulations, and contracts’ that instantiate the shared dispositions of a social group. ^{Footnote 87}

Applying these insights to the domain of international governance, Emanuel Adler and Vincent Pouliot have defined international practices as ‘competent performances’. ^{Footnote 88} More precisely, practices are ‘socially meaningful patterns of action which, in being performed more or less competently, simultaneously embody, act out, and possibly reify background knowledge and discourse in and on the material world’. ^{Footnote 89} The definition has known some success in international legal scholarship, ^{Footnote 90} including in the works of authors seeking to understand the operations of international courts and tribunals. ^{Footnote 91} These studies interrogate the ways in which practices ‘connect structure to agency and back’, as well as ‘the dynamic material and ideational processes that enable structures to be stable or to evolve, and agents to reproduce or transform structures’. ^{Footnote 92}

Taken together, field theory and practice theory form the analytical framework that guides my exploration of the socio-professional dynamics of the international judicial community. In the sections that follow, I apply this framework to map the myriad instances of co-operation and competition among community members in their day-to-day business. The analysis proceeds in three movements. I begin by delineating the external boundaries of the community and identifying the exclusionary mechanisms that enable it to sustain its structural distinction and relative autonomy from the rest of the international legal world. Next, I turn to the internal conflicts that roil the community and examine how its members strive to maximize their capital and consolidate their positions relative to one another. Having shown that the community is simultaneously ‘a relatively autonomous structure and an unsettled mélange of different outlooks and ideas’,Footnote ⁹³ I conclude by discussing the impact of its everyday practices on the conduct of judicial proceedings and the production of legal outcomes.

3. Policing the borders: Co-operation, autonomization, and operational closure

The first challenge that arises in attempting to describe the international judicial community is to draw its boundaries. Who are its members? And what differentiates them from the broader professional universe of international lawyers? Answering these questions is no easy task, because social fields come ‘in various shapes and sizes’, can be ‘tightly organized’ or ‘diffuse’, ^{Footnote 94} and often intersect with other fields. Moreover, my own descriptive perspective is, by all purposes, a chosen perspective that represents, and thus inevitably modifies, the object of my inquiry. ^{Footnote 95} To write about the community is, partly, to constitute it.

That being said, I believe that what sets the community apart from the rest of the international legal profession is the degree of proximity to the routine functioning of international courts and tribunals – which, as I will explain, roughly corresponds to the degree of influence on judicial outcomes. This distinction, however blurry, helps separate an ‘outer’ and an ‘inner’ circle of international adjudication professionals.

In the former camp, we find the wide variety of actors having direct or indirect stakes in international adjudication. Government representatives spend years defining the institutional design of each new court, debating its powers and jurisdiction, and eventually ratifying its founding treaty. Later, they periodically negotiate the appointment or renewal of judges and set the agenda for institutional reform. Meanwhile, national politicians praise or blame judicial decisions to advance domestic or foreign policy agendas; non-governmental organizations submit amici curiae or sponsor complaints in pursuit of advocacy strategies; multinational corporations take jurisprudence into account when setting out trade or investment plans; journalists cover the most significant rulings and disseminate them to the general public; etc. These forms of engagement ensure the continued goodwill of external stakeholders towards international adjudication ^{Footnote 96} and make them the ultimate arbiters of the system.

In practice, however, these stakeholders have a relatively limited say on the day-to-day unfolding of the international judicial process. The pressure they exert on courts and tribunals occurs either before the start of proceedings – through institutional design and the appointment of judges – or after their completion – through the appraisal and the (non-)implementation of judgments. What happens in between is usually of little concern to them: after all, the rules that govern international proceedings aim to shield the content of decisions from overt political interference. If anything, external stakeholders serve as the mediate audience of international adjudicators: a looming presence that observes the unfolding of dispute settlement from a certain distance and intervenes only when the circumstances so require. ^{Footnote 97}

In the inner circle, by contrast, we find the actors who operate within and in the immediate surroundings of international courts and tribunals. These legal professionals are in charge of running the judicial machinery in its routine operations, and their recursive practices shape and inform every stage of the proceedings. Obviously, international judges and arbitrators fit the bill: they are the most recognizable actors in the community, officially vested with the symbolic power to interpret and apply the relevant norms to the cases at hand. Other repeat players include state agents, who head the delegations appearing before the court, and the counsel who represent the parties and submit arguments on their behalf. In addition, the community includes a panoply of actors whose roles are less apparent. For instance, each court or tribunal provides its adjudicators with a set of legal bureaucrats – called clerks, registry or secretariat officials, or arbitral secretaries depending on the institution concerned – who assist in the preparation, deliberation, and drafting of judgments. Likewise, outside of courts, specialized scholars appraise and systematize judicial decisions, identify patterns and inconsistencies in case law, and suggest solutions going forward.

Ostensibly, these various actors occupy distinct positions. However, the boundaries between their roles are blurrier than they first appear. Throughout their careers, community members swap roles frequently – and sometimes even don multiple hats at once. ^{Footnote 98} Prominent academics may take a break from their faculty chairs to serve on an international court; ^{Footnote 99} arbitrators in an ISDS case may appear as counsel in another;Footnote ¹⁰⁰ the legal officers working for a registry or secretariat may later be recruited by government departments or private law firms;Footnote ¹⁰¹ universities routinely organize conferences bringing together practitioners and academics; and so forth. All combinations are possible. This revolving door among the bench, the bureaucracy, the bar, and the academe helps strengthen bonds and forge ties.Footnote ¹⁰² Indeed, while external stakeholders are diffuse and scattered across the globe, the international judicial community is a tight network of habitués who walk the corridors of international courts on a regular basis, hold first-name personal contacts, and boast friendly professional relationships. ^{Footnote 103}

Overall, community members are driven by different interests from external stakeholders. The latter play the game of adjudication in pursuit of goals other than the game itself – be they a country’s perceived national interest, a multinational company’s trade or investment opportunities, an individual’s fundamental freedoms, etc. The former, conversely, derive their capital from the very functioning of the adjudicative mechanism. ^{Footnote 104} For them, the complexities of dispute settlement are not the means to an ulterior result – but an end in itself, and the specific focus of their expertise.Footnote ¹⁰⁵ It follows that community members share a self-interest in defending international judicial institutions as such, extending the reach and pervasiveness of their powers, and constantly reasserting their ‘courtness’. ^{Footnote 106}

As its influence grew, the international judicial community sought to erect barriers to insulate its inner social workings from external competition and secure its control over the everyday functioning of international courts and tribunals. Nowadays, the ‘modes of education and reproduction, paths to access, and definitions of competences’Footnote ¹⁰⁷ of the community are increasingly regimented and serve as powerful mechanisms of social exclusion. Indeed, in their routine unfolding, judicial proceedings take place ‘at a considerable remove’ from political and diplomatic institutions ^{Footnote 108} and are characterized by an increasing sense of clubbiness and familiarity among participants.Footnote ¹⁰⁹

For instance, almost every international court or tribunal is surrounded by a specialized bar of counsel, whose members master the particular subject matter and the judicial style of the institution at hand. ^{Footnote 110} These bars are not formally recognized institutions, as there exist no official qualifications or requirements for someone to represent a party before an international judicial body. ^{Footnote 111} Instead, access to the bar is conditioned on reputation, recursive legal practice, strenuous training, and often the mentorship of an incumbent member.Footnote ¹¹² Accordingly, capital in international litigation is concentrated in the hands of surprisingly small clusters of individuals. In jurisdictions like the ICJ or the WTO, it is common for the same handful of counsel to appear at most hearings alongside their clients.Footnote ¹¹³ Their knowledge of the intricacies of international adjudication grants them a competitive edge over new entrants in the market,Footnote ¹¹⁴ while their repeated participation in the proceedings makes them familiar and reliable faces in the courtroom.Footnote ¹¹⁵ Litigation before other international courts, like the ECtHR, has not yet reached comparable levels of concentration. There too, however, the social proximity between the court and the bar has grown tighter in recent years, with former judges and registry officials joining Strasbourg-based NGOs and law firms.Footnote ¹¹⁶

Likewise, the invisible army of clerks, assistants, and registry and secretariat lawyers works staunchly and discreetly to nudge the decisions of adjudicators, streamline and standardize their practices, and ensure consistency in jurisprudence.Footnote ¹¹⁷ Unlike judges, these actors are fully-fledged bureaucrats whose recruitment through public competitions is not subject to political oversight. Their long-tenure contracts, often outlasting the terms of service of adjudicators, makes them the institutional memory of international courts and tribunals.Footnote ¹¹⁸ The ‘critically important’ ^{Footnote 119} contribution of judicial bureaucrats to the preparation, deliberation, and drafting of judgments is widely known across the inner circle of professional litigators, but is zealously kept secret to outsiders.Footnote ¹²⁰ The few commentators attempting to shed light on the topicFootnote ¹²¹ are often met with scorn and accusations of unprofessionalism.Footnote ¹²² This double standard, defined by some as ‘hypocritical’,Footnote ¹²³ testifies to the community’s desire to remain the only ones in the know, the sole initiates to the arcane mysteries of international adjudication.

Finally, scholarly production in the field is densely populated by ‘practitioner-academics’ who have direct stakes in the system and ‘stand[] to profit from its widespread acceptance’.Footnote ¹²⁴ For instance, much of the writing on investment arbitration is done by authors who themselves ‘are involved’ in it as either adjudicators or counsel.Footnote ¹²⁵ Similarly, European Union law scholarship is dominated by ‘authors working for institutions structurally geared towards the expansion and consolidation of a genuine European legal order’.Footnote ¹²⁶ One might expect similar findings to apply, say, to human rightsFootnote ¹²⁷ and trade lawFootnote ¹²⁸ scholarship as well. This familiarity between the bench and the academe creates a favourable intellectual environment for the flourishing of international adjudication, but also poses an ‘obstacle for independent and clear positioning’. ^{Footnote 129}

Generally speaking, being an insider in the game means being acquainted with its rules, adopting strategies that resonate with other players, and ultimately shaping legal outcomes to an extent that is usually precluded to outsiders. Being ‘well-known to the Judges’ and understanding by experience ‘the difficulties, pitfalls and tricks of the trade’ ^{Footnote 130} enables community members to discern which claims are more likely to stick and concentrate their resources on ‘rule-changes that are likely to make a tangible difference’. ^{Footnote 131} With a little stretch of the imagination, one could say that the community has replaced external stakeholders as the immediate audience of international adjudication. When a court or tribunal issues a decision, it is often ‘speaking’ more directly to the legal professionals gravitating around it than to its broader political constituency or the general public. ^{Footnote 132}

Such a degree of socio-professional closure contributes to the independence and impartiality of international courts and ensures that extraneous factors and preoccupations are kept at bay. Yet, it can also give rise to frictions between the inner circle of community members and the outer circle of political stakeholders, especially when the latter feel unfairly marginalized in the day-to-day operations of judicial institutions. When this happens, one can witness a temporary re-entry of external forces into the community’s dynamics.

Two recent examples can help illustrate these tensions. The first is the downfall of the WTO Appellate Body. Once considered one of the most powerful international courts, since 2017 the Appellate Body has been facing the United States’ veto on the appointment of new adjudicators, eventually leading to a complete paralysis of its proceedings in December 2019. ^{Footnote 133} Officially, the United States justified its blockade by accusing the Appellate Body of overstepping its judicial mandate in a number of ways. ^{Footnote 134} However, it soon became clear that there was more at stake than a simple normative disagreement or a raw assertion of diplomatic might: rather, the attack on the Appellate Body was also a radical attempt by US political stakeholders to regain control of a process that they believed was slipping out of their hands. ^{Footnote 135}

In pursuit of this goal, the US delegation tried to persuade the WTO Director-General to sack the director of the ABS, ^{Footnote 136} the legal bureaucracy that provides support to appellate adjudicators. It also threatened to freeze the WTO’s annual budget for 2020 unless other states agreed to draconian cuts to the Appellate Body’s funding. ^{Footnote 137} Ultimately, nobody was fired, but ABS staff were reallocated to other WTO divisions. The offensive on the Appellate Body was also an offensive on the inner circle of professional WTO litigators, aimed at disrupting their quasi-monopoly over the conduct of appellate proceedings.

This backlash poses a formidable threat to the club of trade practitioners, which has been in turmoil since the beginning of the crisis. Professional feuds both inside and outside the WTO are reshuffling alliances and reconfiguring the community, whose participants are mobilizing to mitigate the impact on their career prospects. ^{Footnote 138} For instance, in 2020, a number of WTO member states (excluding, of course, the United States) agreed to the Multi-Party Interim Appeal Arbitration Arrangement (MPIA), designed to temporarily replace ordinary appellate proceedings. While the new mechanism is still in its infancy, it bears highlighting that the core MPIA proposal was developed jointly by a state delegation and a trade law firm based in Geneva. ^{Footnote 139}

The second example is offered by the ongoing discussions of the institutional reform of ISDS.Footnote ¹⁴⁰ Since its inception, this area of international law has been dominated by a select élite of practitioners enjoying a wide reputation and possessing highly concentrated professional capital. When, in 2017, the United Nations Commission on International Trade Law (UNCITRAL) was tasked with working on ISDS reform, it became apparent that the negotiating states would not let the arbitration ‘mafia’Footnote ¹⁴¹ infiltrate the debate and perpetuate their dominance.

Faced with this hostility from outside political stakeholders, the inner circle of arbitration practitioners had mixed reactions. Some strove to keep control over the system, warning that the UNCITRAL project would ‘bring termites into [the] wooden house of investor state dispute resolution’.Footnote ¹⁴² Others showed a greater ability to adapt to the new environment and to secure a seat at the negotiating table. For instance, two papers co-authored by a leading arbitrator and one of her closest collaboratorsFootnote ¹⁴³ offered the technical basis for the UNCITRAL discussions and are largely credited for catalyzing the reform process.Footnote ¹⁴⁴ Thanks to their efforts, the two authors were included in Switzerland’s delegation and are now key actors in the debate.

To sum up, the international judicial community maintains unstable and unsettled boundaries vis-à-vis both international politics and the rest of the international legal profession. Through networked interaction, tight social relationships, and various forms of professional co-operation, community members carefully police and refurbish those boundaries to perpetuate the internal logics of their field and its continued autonomy from competing social fields. Such esprit de corps may suggest that the community is internally homogenous, heterarchical, and peaceful. But, as I discuss in the next section, nothing would be farther from the truth.

4. Bubbling beneath the surface: Competition, assertion, and contestation

Having outlined the external relations of the international judicial community, it is now time to untangle the conflictive interactions that occur inside the field. As discussed,Footnote ¹⁴⁵ the community can be understood in Bourdieusian terms as the site of an endless confrontation among its participants, who amass and deploy various types of capital to consolidate their relative positions and secure the symbolic power to impose their particular visions as dominant and universal. Given that Bourdieu originally formulated his theory in relation to a localized and highly structured context – French society – his teachings should be handled with care when applied to international legal fields, where agents are ‘somehow more schizophrenic’ than at the domestic level.Footnote ¹⁴⁶ Yet, even when employed in an ‘indicative and flexible fashion’,Footnote ¹⁴⁷ field theory offers several valuable lessons about the specific inner dynamics of the community.

The first lesson is that capital is unevenly distributed across the community. Not all positions carry the same weight and not all voices are equally listened to. ^{Footnote 148} Powerful social hierarchies, both formal and informal, shape the social relationships among community members, ^{Footnote 149} with a handful of professionals sitting at the top of the pyramid and the majority slowly crawling up from the bottom. The most eminent actors in the field are widely recognizable throughout the international legal world, and some of them even break through with the general public. The rest of the lot is relegated to the underbelly of the judicial machinery.

These hierarchies exist, first, within each cluster of community actors.

Inside a court, judges enjoy an exalted position compared to their supporting legal staff.Footnote ¹⁵⁰ Yet, not all judges are created equal. Most courts and tribunals attach formal significance to the role of their presidents or chairpersons, who often exercise greater powers and bear additional responsibilities than the rest of the bench. Some institutions, like the ECtHR and the WTO, contemplate two levels of jurisdiction, therefore placing first-instance adjudicators in a subordinate position vis-à-vis their appellate counterparts. Official prerogatives aside, certain judges possess informal qualities – experience, fame, fluency in the court’s working languages – that makes them perceived as more authoritative, more capable, or more reliable than others, thus becoming the object of admiration – or envy – by their colleagues. ^{Footnote 151}

The supporting legal bureaucracy, too, can be formally organized in tiers of seniority (as with the ABS) or be more horizontal (as with ICJ clerks or arbitral secretaries). Administrative personnel, translators, interpreters, and other non-lawyers usually come last in the court’s ranks. At the informal level, bureaucrats with a long-standing record of service are more knowledgeable about a court’s practice and jurisprudence than their more junior colleagues, ^{Footnote 152} thereby wielding greater power in the conduct of proceedings and the definition of legal outcomes.Footnote ¹⁵³

Meanwhile, law firms specializing in international litigation tend to mirror the structure and division of labour typical of the Anglo-Saxon market, from which they often originate. New recruits work for several years as salaried associates ‘for their employers’ clients as well as for their own’.Footnote ¹⁵⁴ During that probation period, they are expected to meet stringent benchmarks and procure new business opportunities to move up the firms’ ranks. Indeed, advancement to partnership is by no means guaranteed, such that junior lawyers ‘are in constant battle with each other for resources and remuneration’. ^{Footnote 155} Partners, whose earnings are calculated on the basis of equity, carefully manage the workforce and entertain good relationships with current and prospective clients. In the courtroom, they are usually in charge of delivering the main pleadings – thereby fostering their visibility among attendees – while associates tend to take the backseat, provide support, and pass notes – thus going almost unnoticed.Footnote ¹⁵⁶ Regardless of their rank, private attorneys are but one part of the teams representing the parties in litigation. Frequently, they must contend with other actors – state agents, domestic industry representatives, external experts, etc. – who may hold different views and sensibilities, thereby creating potential frictions and competition within the teams themselves.Footnote ¹⁵⁷

Second, informal hierarchies exist across clusters, i.e., community-wide, with certain professional profiles garnering more recognition than others.

Predictably, judges tend again to occupy the most prestigious spot. Given the symbolic power accorded to judicial interpretation, being appointed to an international court is widely regarded as the acme of one’s trajectory in the field. The total number of available positions on permanent courts is estimated at around 300 ^{Footnote 158} – a small figure compared to the overall size of the community. When states nominate their candidates to the bench, they seldom do so based on standardized selection procedures. Often, a successful candidate owes the privilege to an inscrutable set of factors such as possessing the right nationality, holding personal and professional contacts, and more generally being at the right place at the right time. ^{Footnote 159} Under these conditions, it would be difficult for even the most accomplished lawyer to deliberately plan to become an international judge.

Similar reverence is paid to top-tier investment arbitrators, who constitute an even smaller group. Capital in the ISDS arena is notoriously concentrated, with 20–30 arbitrators securing most appointments to tribunals and leaving the rest of their peers fighting for the scraps. The status acquired by the arbitration élite is the object of intense scholarly analysis. ^{Footnote 160} As evidence of that status, the United States bestows the title of ‘Honorable’ on its nationals sitting on the US-Iran States Claims Tribunal, thereby equating them to federal judges. While most US members of the Tribunal do not make much of this title, some proudly sport it on their professional webpages. ^{Footnote 161}

University professors and prominent litigators vie for the second position in the hierarchy. Both clusters of actors enjoy widespread recognition within the field, and both offer a steady pool of candidates for international courts and tribunals. However, the types of capital that scholars and counsel deploy are quite different. The former advance their position by disseminating their opinions across the community. Academics stand in a ‘co-constitutive’ ^{Footnote 162} relationship with judicial practice: on the one hand, it is that practice that creates the object of their studies; on the other, it is their theories, commentaries, and systematizations that generate the background knowledge necessary to structure the epistemic categories and the expert vernacular of practitioners. ^{Footnote 163} Ideas legitimate judicial power, and judicial power enforces ideas.

Counsel, for their part, mobilize economic capital and channel clients into the dispute settlement process, thereby acting as ‘brokers’ that connect the demands of the parties with the legal supply of the courts. ^{Footnote 164} Indeed, it is largely thanks to their entrepreneurship that international adjudication has expanded from a fragile political project to a robust node of global governance. Counsel’s allegiance to the litigants they represent is somewhat ambiguous: when they participate in proceedings, the do not only seek to win the case, but also to bolster their standing among their peers, develop a cordial relationship with the bench, and secure future hiring opportunities.Footnote ¹⁶⁵ Hence, counsel’s prime source of capital ‘is the recognition of judges, not clients (who are merely proximate sources of capital)’. ^{Footnote 166}

At the bottom of the hierarchy we find the legion of clerks, secretariat and registry staff, and arbitral secretaries assisting the adjudicators. While, as mentioned, this cluster of actors constitutes the backbone of international courts and tribunals, its manifold activities take place mostly off the radar, concealed behind the closed doors of judicial institutions and largely neglected by external commentators.Footnote ¹⁶⁷ Faceless by definition, judicial bureaucrats seldom enjoy the visibility necessary to rise to fame. Some of them relish this invisibility, and take great pleasure in the influence they wield behind the scenes.Footnote ¹⁶⁸ Their vocation, as well as the source of their capital, resides in what Max Weber described as ‘technical superiority[,] [p]recision, speed, unambiguity, knowledge of the files, continuity, [and] discretion’. ^{Footnote 169} For others, employment with the bureaucracy is a mere entry point into the community and, hopefully, a springboard towards more visible positions.Footnote ¹⁷⁰

Interestingly, the ‘conversion rate’ ^{Footnote 171} between social and economic capital is not 1:1. In fact, if we were to rank community members based on their income, the hierarchy would look a bit different. At the top, we would find big law firm partners and élite arbitrators. The former can charge in excess of USD 1,000 per hour, especially when working on large trade or investment cases. ^{Footnote 172} The latter’s fees are capped at US$3,000 per day when the arbitration takes place under the auspices of the International Centre for Settlement of Investment Disputes (ICSID), and can rise up to US$6,000 per day if the arbitration is governed by the rules of the London Court of International Arbitration. ^{Footnote 173} Next we would find permanent judges, whose remuneration, while varying across courts, can exceed US$200,000 per annum. ^{Footnote 174} Judicial bureaucrats would come a distant third. Their net annual salaries differ widely depending on institutional affiliation and level of seniority, and indicatively range from US$60,000 (for newcomers) to US$150,000 (for top officials). ^{Footnote 175} Finally, academic remuneration is highly dependent on the salary structure of each university, but would normally land in the lower regions of the chart. Of course, the fact that community participants may don multiple hats at once enables them to combine different sources of income.

Third, competition occurs not only within the same judicial institution, but also among different courts and tribunals.

The exponential growth of the profession at the turn of the century was accompanied by its progressive specialization into sectoral areas of expertise such as human rights, trade, investment, territorial delimitation, and international criminal law. The international judicial community is no stranger to this trend, and has been ‘fragmenting’ ^{Footnote 176} into several sub-communities that operate largely independently of one another. Echoing a well-known metaphor, ^{Footnote 177} one could say that the international judicial community resembles a constellation. Each court or tribunal is a star exerting its gravitational pull on the various planets – government departments, law firms, academic centres, and so on – that orbit around it in concentric circles, from centre to periphery.

Some gravitational fields may be stronger than others. Specialized knowledge may be more concentrated in certain sub-communities (e.g., the WTO, characterized by a highly sectarian expertise) than in others (e.g., the ICJ, which takes great pride in its ‘generalist’ outlook). Moreover, the trajectories of some planets may be attracted to the gravitational fields of more than one star, therefore creating overlaps between different sub-communities. ^{Footnote 178} For instance, ICJ experts often cross into ISDS territory by appearing as arbitrators or counsel; ^{Footnote 179} European Union law specialists have progressively come to infiltrate the WTO arena, with repercussions on the ethos, style, and tone of trade adjudicators; ^{Footnote 180} regional human rights courts maintain tight relationships among their judges and legal bureaucracies, and carefully read each other’s judgments; ^{Footnote 181} and so on.

Yet, none of the stars – not even the ICJ – can be deemed to sit at the centre of the constellation. No sub-community can lay claim to a truly neutral and universal outlook on the international legal world, which has become too vast, too pluralistic, and too complex for any one individual or group to master it all. ^{Footnote 182} Instead, the various sub-communities ‘are necessarily partial and selective’. ^{Footnote 183} The position that each occupies in the constellation shapes its social dynamics, its epistemic categories, and its operational boundaries. This polycentricity entails entry barriers and conversion costs for professionals wishing to transition from one sub-community to another. A senior lawyer trained in the practice of the WTO may struggle to land an equally senior position at a firm specializing in ISDS. A preeminent scholar in the field of European human rights law may not enjoy the same reputation in ICJ circles. And so on.

Seen from this angle, the emergence of ‘self-contained regimes’Footnote ¹⁸⁴ in international law acquires a new meaning. Over time, the sub-community gravitating around each international court develops a set of dispositions as to what legal sources are trustworthy and what others are not, based on its specialized expertise. The operational closure of each sub-network fosters trust among its participants ^{Footnote 185} and, at the same time, reinforces its epistemic bias. ^{Footnote 186} Hence, the members of a sub-community do not only seek autonomy from the broader international legal profession – they also guard their turf from other sub-communities, which may constitute a source of ‘disturbing outside perspectives’. ^{Footnote 187} Any attempt to transfer expertise, practices, or modes of thinking from one sub-community to another is considered a trespass that might shake the ‘context-preserving routine’. ^{Footnote 188}

Consider, for instance, the two ICSID arbitral awards rendered against Argentina in the CMS and Continental cases. In both disputes, Argentina sought to justify its measures based on the state of necessity under customary international law and specific treaty provisions. ^{Footnote 189} The CMS tribunal, for the most part, addressed Argentina’s defence through the ‘traditional’ prism of the customary rules of state responsibility. ^{Footnote 190} By contrast, the Continental tribunal observed that similarities existed between the defence raised by Argentina and the general exceptions enshrined in Article XX of the GATT. It therefore found it ‘more appropriate to refer to the GATT and WTO case law … rather than to refer to the requirement of necessity under customary international law.’ ^{Footnote 191}

The different approaches adopted by the two tribunals could be due to many factors, including the ways in which the parties presented their arguments. However, a plausible explanation is that the president of the CMS tribunal was a practitioner with extensive experience in general international law, ^{Footnote 192} whereas the president of the Continental tribunal was a sitting member of the WTO Appellate Body. ^{Footnote 193} The former was an insider to the ISDS field; the latter came from another sub-community carrying a baggage of ‘foreign’ expertise. Unsurprisingly, the ‘unorthodox’ approach of the Continental tribunal was harshly criticized by the incumbents in the ISDS regime, who found the tribunal’s reasoning ‘inadequate and flawed’, making ‘unsupported leaps to trade or other international law’, and threatening to ‘undermine the legitimacy of investor-State arbitration’. ^{Footnote 194}

This example nicely illustrates the second lesson we can learn from Bourdieu – specifically, from his observation that ‘technical competence … is inevitably social’. ^{Footnote 195} The distribution of capital within the community is inseparable from the substance of legal activity. Ostensibly, the ‘ultimate object’ of the game of international adjudication is to persuade one’s audience that their legal opinion or solution to a given problem is ‘correct’. The ‘winner’, in principle, is he or she who succeeds in securing adherence to his or her own views. ^{Footnote 196} However, ‘victory’ is not only a source of personal gratification – it is also a means to bolster one’s capital in the field. Thus, the interpretive and technical arguments put forward by community members can never be reduced to the expression of abstract and dispassionate beliefs, but always reflect the specific positions, the agendas, and the sheer ‘careerism’ ^{Footnote 197} of the actors involved.

For instance, when a counsel pursues a sophisticated line of argument in court, they do merely wish to advance their client’s interests; they also seek to impress the judges with their interprétation savante and, possibly, secure a precedent they can exploit in future cases with other clients.Footnote ¹⁹⁸ Likewise, when a scholar develops a new legal theory or taxonomy, they often undertake a ‘marketing campaign’ to disseminate it across courts and tribunals in the hope that practitioners will adopt it as their own, or even that adjudicators will cite it in their rulings. ^{Footnote 199} Each actor’s endowment of capital determines, at any given moment, the persuasiveness and the deference accorded to their views. A reputable judge will think twice before following the advice of a new recruit to the supporting bureaucracy;Footnote ²⁰⁰ a first-year associate will have to work extra hard to include a certain argument in a submission against the will of a seasoned partner;Footnote ²⁰¹ and so on.

The inextricable link between legal argument and social positioning brings us to the third and final lesson. Because the distribution of capital across the field can change over time, the social configurations of the international judicial community are not carved in stone, but ‘historically contingent’.Footnote ²⁰² The competition among judges, bureaucrats, agents, counsel, and scholars does not serve only to entrench the logics of the community, but also to create spaces of contestation of power and hierarchies. Case after case, those actors adopt schemes, postures, and strategies that may be ‘risky or cautious, subversive or conservative’ ^{Footnote 203} depending on the circumstances. The incumbents in the game have a natural tendency to perpetuate their position. Challengers have to come up with other plans, ranging from opportunistic deference to overt defiance, to get the upper hand.Footnote ²⁰⁴ At every turn, old alliances may break down and new ones emerge, redistributing capital in a continuous ‘context-transforming struggle’. ^{Footnote 205}

An example of these reshufflings is offered, once again, by the recent transformations of WTO adjudication following the demise of the Appellate Body.Footnote ²⁰⁶ While several commentators speak to an impending ‘dejudicialization’ of trade dispute settlement driven by member state interests,Footnote ²⁰⁷ what is also happening is an internal renegotiation of capital among trade adjudicators and the secretariat – or, to put it differently, between political appointees and technocratic experts. Both sides are working behind the scenes to assert their dominance in the conduct of proceedings and contain each other’s influence on the production of legal outcomes in the trade arena.Footnote ²⁰⁸ The terms of the renegotiation are historically determined. In the WTO’s early days, it was suggested that every adjudicator have a personal clerk, with whom they would have a one-to-one working relationship. ^{Footnote 209} The proposal was ultimately scrapped in favour of secretariat divisions responding collectively to the whole bench. This seemingly innocuous organizational choice has, in fact, profoundly affected the structures, practices, and allegiances of the WTO judiciary, and has now turned into a bone of contention.Footnote ²¹⁰ Every battle, however mundane, brings with it a host of ‘discarded possibles’, and every ‘reconstruction of genesis’ reminds us of the ‘possibility that things could have been (and still could be) otherwise’. ^{Footnote 211}

5. A community in action: From structures to practices

In the two previous sections, I sought to outline the social features of the international judicial community. Partly inspired by Bourdieu’s teachings, I listed its main participants, discussed how they relate to one another, described their co-operative quest for autonomy from competing social fields, and shed light on their hierarchies and competitive interactions. By now, it should be clear that the community is at once externally cohesive and internally conflictive. To conclude the discussion, it now bears reflecting on how this twofold structure affects the way community members go about their everyday business, contribute to the unfolding of judicial proceedings, and shape the piecemeal construction of legal outcomes at the international level. In other words, it is time to connect the field’s structures to its practices.

This is where the core tenets of practice theory find their way into the analysis. As mentioned, many contemporary scholars seek to move beyond the ‘rationalist’ and ‘norm-based’ accounts of adjudication that have dominated international legal thinking for much of the twentieth century. ^{Footnote 212} In particular, practice theorists explore the structures of power and knowledge that enable and constrain agents’ perceptions and behaviour in their social spaceFootnote ²¹³ and shape their engagement in a contingent and evolving set of activities. ^{Footnote 214} Particularly relevant, for present purposes, is Adler and Pouliot’s definition of practices: to recall, practices are ‘socially meaningful patterns of action which, in being performed more or less competently, simultaneously embody, act out, and possibly reify background knowledge and discourse in and on the material world’. ^{Footnote 215}

This definition spells out four main attributes that distinguish practices from – and make them more than – simple action. Let us see how each of these attributes plays out in the specific context of the international judicial community, and how it intersects with Bourdieu’s insights on the sociology of the juridical field.

First, practices are ‘performances’. At its simplest, this means that international adjudication entails ‘a process of doing’ that has ‘no existence other than in [its] unfolding’. ^{Footnote 216} Thus understood, this attribute is self-evident. The various members of the community engage in a variety of activities throughout the adjudicative process. Chief among these is the interpretation of the international rules applicable to the case at hand. According to many, this is the activity that defines the very essence of adjudication. Indeed, all community members take part, in one way or another, in the ‘symbolic struggle’ for appropriation of the meaning of legal texts: ^{Footnote 217} agents and counsel through their briefs and oral arguments, judicial bureaucrats through their advice and internal memoranda, scholars through their articles, and adjudicators through their decisions.

However, legal interpretation does not exhaust the scope of international judicial practices. In fact, a large swathe of life at the court is taken up by tasks that are not of ‘interpretive’ in nature. For instance, state agents routinely co-ordinate with their political masters to define the goals and modes of recourse to international courts. Counsel spend time and energy reaching out to clients, devising business and litigation strategies, and cultivating amicable relationships with the bench.Footnote ²¹⁸ Court bureaucrats digest vast amounts of information, summarize the litigants’ legal and factual submissions, and provide logistical support throughout proceedings.Footnote ²¹⁹ Academics seek to secure chairs, funding, and visibility within their respective universities. Adjudicators often engage in extra-judicial activities such as lecturing, publishing, and outreach. And so on. ^{Footnote 220}

Whether interpretive or not, each act of ‘doing’ leaves a trace on the routine realities of litigation. Some traces are tangible: a counsel’s written submission, a bureaucrat’s memo, a folder of documentary evidence and, of course, the court’s final judgment are all embodied in the physical medium of printed paper. The corporeal properties of the object are not a mere wrap for content: in many instances, they take on a significance of their own. For instance, a thick dossier, one that contains lengthy party memorials and voluminous amounts of evidence, will typically make for a ‘big case’ requiring the allocation of additional time and staff resources to be processed; the length of a decision will be read as a proxy for the complexity of the issues addressed, the degree of harmony or discord among the judges, etc.Footnote ²²¹ Other traces are physically intangible, but no less material: oral pleadings, deliberations, and conference presentations all generate a web of meaning that carries a certain weight, informs the behaviour of both speakers and listeners, and imparts direction to future activities.

But there is more to the word ‘performances’ than first meets the eye. One cannot think about that word without thinking about theatre. ^{Footnote 222} From artists to semioticians, from literary critics to philosophers, many see everyday life as rife with instances of theatrical performance. ^{Footnote 223} As Umberto Eco once noted, ‘[i]t is not theatre that is able to imitate life; it is social life that is designed as a continuous performance and, because of this, there is a link between theatre and life’. ^{Footnote 224} Or, as musician David Byrne puts it, ‘there [are] lots of unacknowledged theater forms going on all around’ that ‘have been so woven into our daily routine that the artificial … aspect has slipped into invisibility’. ^{Footnote 225}

International judicial practices are no exception. The adjudicative process is a succession of carefully staged acts carried out by certain actors, directed at a certain audience, and following a script. Some steps of the process are more explicitly ‘performative’ than others. The delivery of an ICJ judgment, held in the solemn atmosphere of the Great Hall of Justice, is a largely ceremonial act symbolizing the triumph of justice over the cynicism of inter-state politics.Footnote ²²⁶ Similarly, court hearings are often tightly choreographed eventsFootnote ²²⁷ that publicly display the ‘theatricalization – in the sense of magical evocation, sorcery – of the united group consenting to the discourse that unites it’. ^{Footnote 228} Yet, theatrics and rituals permeate many other corners of life at the court.

Second, practices are ‘patterned’, meaning that they tend to exhibit ‘certain regularities over time and space’. ^{Footnote 229} Their repetition ‘reproduce[s] similar behaviors with regular meanings’, and ‘structures interaction’ within a socially organized context. ^{Footnote 230} This attribute comports well with the iterative nature of international judicial proceedings. Although every dispute is unique in the legal issues it raises, the procedural steps that mark its unfolding are standardized. Every case invariably begins with the submission of written memorials by the complainant and the respondent, often followed by rejoinders and counter-rejoinders. These written filings are then processed by the bureaucrats assisting the court, who circulate internal memoranda to summarize their analyses and help adjudicators prepare for the next steps. After the written phase, most courts and tribunals hold hearings, where the merits of the case are discussed orally. After the hearings, the adjudicators convene for deliberations and cast their decisions about the issues at stake. Based on the adjudicators’ instructions, the final judgment is drafted – typically by the bureaucracy – and then reviewed, approved, and issued to the parties and the public.Footnote ²³¹

Iteration is not limited to the procedural steps of litigation but, importantly, is entrenched in the social structure of the international judicial community. As discussed at length,Footnote ²³² the community is a close-knit network whose participants know each other well, communicate regularly, entertain long-term professional relationships, and defend their club from external competition. In the game of adjudication, repeat players are the norm and one-shotters are the exception, and the social capital of each player stems in part from their experience and recurring participation in proceedings. It follows that international judicial practices occur within a ‘highly organized context’ and presents a strong measure of repetition. ^{Footnote 233}

The density and tightness of the community is deeply intertwined with the third attribute of international judicial practices, namely their being ‘performed more or less competently’ depending on the ‘background knowledge’ of the actors carrying them out. ^{Footnote 234} The Bourdieusian notion of habitus, i.e., ‘the internalized schemes’ and the ‘practical sense of reality’ guiding agents’ behaviour,Footnote ²³⁵ proves particularly relevant here. The hallmarks of (in)competence in the community and the social recognition of its members do not reside in the abstract quality of the work performed. Instead, they are socially attributed by the community itself based on collectively held standards which, in turn, invariably reflect the dominant vision and the attendant distribution of capital at any given moment. Habitus tends to reproduce the very structures of which it is itself the product.Footnote ²³⁶ Through education, training, and work experience, new entrants in the community are initiated to the way things are done. ^{Footnote 237} Over time, they master the doctrines, the argumentative techniques, the vernacular, the ethos, the aesthetics, and the mythologies of their peers and superiors, ^{Footnote 238} and tend to reproduce them through communication and transmission of knowledge. Hence, habitus is not only a source of constraint for those who play the game of adjudication; it also enables them to make statements and take positions that will be accepted as ‘true’ or ‘valid’ by other players. ^{Footnote 239}

The outer limits of the game, beyond which no respectable player can venture, are dictated by doxa – to recall,Footnote ²⁴⁰ the set of unquestioned truths that define the universe of possible practices and discourses in the field. ^{Footnote 241} International adjudication has no short supply of doxic beliefs: that law is better than politics; that politics is better than war; that judicialization fosters the predictability of behaviour on the world stage; and the like.Footnote ²⁴² Incidentally, those beliefs aggrandize the self-perception of the community as indispensable to international affairs. Many of its members have become blind to the irreducible pluralism of global society. From their vantage point, it is easy to forget that there are more things in heaven and earth than are dreamt of in their philosophy. ^{Footnote 243}

The habitus of the community, which reifies the structural power relations among its members, informs every aspect of life at the court, including practices that have little to do with legal argument. It is so, for instance, that a counsel may calibrate their argument so as to avoid potential conflicts with prospective clients;Footnote ²⁴⁴ that a newly appointed judge may accede to the views of a senior colleague out of deference;Footnote ²⁴⁵ and that a scholar’s theory may acquire visibility and semantic authority thanks to their astute positioning on the academic market.Footnote ²⁴⁶ This is due to the fourth and final attribute of international judicial practices: their ability to weave together the ‘discursive’ and the ‘material world’.Footnote ²⁴⁷ As mentioned,Footnote ²⁴⁸ the community knows no sharp distinction between technical argument and social positioning. Its legal debates cannot be abstracted from the objective conditions of competition among its participants. Thus, while the communications that punctuate judicial proceedings may be disguised as ‘legal discourse’, they always bear ‘material consequences for the litigants’. ^{Footnote 249}

The intersection between the social structures and the everyday practices of the community leads to one last question: namely, the interplay of freedom and constraint in the judicial interpretation of international law. What guides international courts and tribunals in deciding cases the way they do? What limitations and pressures do they encounter? And what agency and discretion do individual actors enjoy in the process?

As the preceding analysis suggests, the answer lies in the inner workings of the community itself, which can be described by the shorthand of structured contingency. ‘Contingency’, because the path that leads to the formation of an international judgment is not predetermined, but open-ended. Every step of the process contemplates moments of choice and purposeful action on the part of the professionals involved. Each actor has countless opportunities to voice their opinion, assert and resist claims, and exercise a discrete portion of agency to steer the course of proceedings. ‘Structured’, because while existing arrangements can be changed, ‘change unfolds within a context that includes systematic constraints and pressures’. ^{Footnote 250} Departing too abruptly from the rules of the game can lead to professional reprimand, derision, or outright expulsion from the game itself.

Seen through the lens of structured contingency, the practices of the international judicial community are both the vehicle of reproduction that ensures predictability in international legal outcomes and the source from which legal change originates. ^{Footnote 251}

The community plays its stabilizing role in both an active and a passive way. Throughout the adjudicative process, it pushes and forces adjudicators by expressing views as to how certain issues should be addressed, how certain legal terms should be read, and what bodies of rules should be considered to solve the case. Once the judgment is rendered, it carefully tests its persuasiveness, ascribes (in)competence, and acts as the ultimate arbiter of professional recognition. At each step, community expectations determine the continued validity of legal standards and ensure jurisprudential continuity in a system without formal stare decisis. While a decision that slightly departs from canon will normally be tolerated, an abrupt change of direction will encounter resistance and be attacked as an anomaly, a deviation, or – heaven forbid! – an ‘irrational’ decision. ^{Footnote 252} Hence, the community serves as the anchor that prevents adjudicators from sailing adrift, adopting ‘extreme’ decisions, and ripping the underlying social fabric apart.

But the community is not only a source of stability. Its practices also help explain how legal outcomes evolve over time.Footnote ²⁵³ After all, stability is only ‘an illusion created by the recursive nature of practice’, whereas change ‘is the ordinary condition of social life’. ^{Footnote 254} Given the forms of competition that agitate the community,Footnote ²⁵⁵ the boundaries, priorities, and preoccupations of judicial regimes are ‘never inherently fixed or stable’, but are ‘constantly being renegotiated’. ^{Footnote 256} The expert vocabularies in use in international courts are ‘sites of controversy and compromise where prevailing “mainstreams” constantly clash against minority challengers’. ^{Footnote 257} Each agent modifies the form taken by arguments and the salience of texts, and traces ‘a set of divergent paths, mobilizing clans who confront each other with facts, precedents, understandings, opportunities or public morality, all of which are used to stoke the fire of the debate.’ ^{Footnote 258}

These tensions create paths of resistance and open the door to new legal approaches, new interpretive postures, new ways of doing things. Innovations are seldom presented as radical, lest they be dismissed out of hand. They will usually creep in through the backdoor – discussed as a side point during a meeting, inserted in the paragraph of a party submission or internal memo, etc.Footnote ²⁵⁹ The most successful will then slowly grow in the system – first as obscure footnotes buried in a judgment, then as obiter dicta in the main text, and finally as the new standard against which the community measures the persuasiveness of legal reasoning. Ultimately, change occurs when the dominant assumptions embedded in a judicial regime are successfully challenged and replaced by new assumptions, as a result of the piecemeal evolution of the power relationships and the relative distribution of capital among the actors involved. Whenever the judicial process culminates in a final decision, ‘it is never because pure law has triumphed, but because of the internal properties of these relations of force or these conflicts between heterogeneous multiplicities’. ^{Footnote 260}