Indeterminacy, Ideology and Legitimacy in International Investment Arbitration: Controlling International Private Networks of Legal Governance?

This article connects the insights of post-realist scholarship about radical indeterminacy and its consequences for the legitimacy of adjudication to the current legitimacy crisis of the international investment regime. In the past few years, numerous studies have exposed serious shortcomings in investment law and arbitration including procedural problems and the substantive asymmetry of the rights protected. These criticisms have prompted a broad consensus in favor of amending the international investment regime and multiple reform proposals have appeared that appeal to the rule of law ideal as an instrument for increasing the acceptability of the international investment system. This article argues that the reliance of such proposals on jurisprudential approaches that fail to adequately accommodate the post-realist indeterminacy critique and take seriously the role of ideology in adjudication renders reform efforts unable to solve the legitimacy problems of the investment regime. The conclusions suggest the need to abandon implausible claims to depoliticization and face the methodological challenges posed by the promise of ideologically balanced assessments advanced by some rule of law theorists. The article finally points at the urgency to reform traditional approaches to doctrinal work in order to increase awareness of critical challenges and open up doctrinal methods to alternative methodological avenues.


Introduction
"…the principles that animate our social and political institutions are not self-interpreting thoughts or pure conceptual essences, but rather are ambiguous affairs, by no means immune from appropriation as tools of tyranny." Susan Marks, 2001. The rule of law ideal has become the common denominator of a wide range of proposals for the reform of the current international investment regime [5,50,116]. 1 The shared purpose of these references to the rule of law is to solve the legitimacy crisis spawned by a growing body of evidence pointing at serious incoherencies and power asymmetries in international investment law (IIL) and its investor-state dispute settlement system (ISDS), notably investor-state arbitration (ISA) [6,43,47,85]. These reform efforts aim at linking the moral force of the rule of law ideal to IIL and ISA in order to convince key stakeholders of the fairness of the regime [4,67,127,132,167]. However, reformers are finding it hard to agree on what problems the reform should address and what rule of law standards it should follow as a result of which proposals deal with a disparate number of issues-ranging from institutional design to procedural and substantive law matters-and seem unlikely to have a comprehensive impact on the complex network of international investment agreements and arbitration rules and procedures that makes out the regime [123,139,148].
This article argues that the legitimacy problems of IIL and ISA as well as the difficulties to solve them by appealing to rule of law standards are caused by the current jurisprudential failure to adequately adjust the ideal of the rule of law 2 to the indeterminacy critique articulated by post-realist scholarship during the second half of the twentieth century. 3 Only by adding this critical-analytical perspective to the study of the problems of IIL and ISA can the legitimacy crisis and some of its most 1 The most influential professional bodies and networks in the area of international law have joined this initiative. Cf. e.g. 2018 Report of the International Law Association's (ILA) Committee on the Rule of Law and International Investment Law, available at https ://www.ila-hq.org/index .php/commi ttees ; and the 2019 Report of the Eighteenth commission of the Institut de Droit International (IDI) on the Equality of Parties before International Investment Tribunals and the IDI Resolution of 31 August 2019, available at https ://www.idi-iil.org/app/uploa ds/2019/09/18-RES-EN.pdf. 2 The rule of law notion is relevant to this study only insofar as it is used as a legitimizing device in IIL/ ISA debates. Despite its aporias and deficiencies, the moral force of the rule of law ideal continues to summon strong and widespread social support across the world and is, therefore, a term whose importance must be reckoned with, cf. [95]. Notwithstanding, critics have repeatedly warned that the notion of '"the rule of law" has become meaningless thanks to ideological abuse and general over-use' (Judith N. Shklar. 1987. 'Political theory and the rule of law', quoted in [159,139]). The attempt to identify a core or across-the-board understanding of the rule of law notion is beyond the scope of this work. Among the many possible legal and political approaches to the concept, this article focuses on the work of mainstream authors (e.g. [2,3,86,91]) insofar as they make a direct and significant effort to address the critical indeterminacy challenge while aiming at the development of the rule of law ideal. On the diversity of rule of law definitions, cf. [11,20,28,34,45,144,147,159]. 3 Literature on post-realist/post-modern legal scholarship is immeasurable. Being aware of its internal heterogeneity, this work draws to a large extent on some elements of the version advanced by Critical Legal Studies, cf. e.g. [7,8,13,26,62,64,70,72,76,78,79,128]. Cf. also more recently [105,161].

3
Indeterminacy, Ideology and Legitimacy in International… relevant consequences be effectively explained in legal terms and possibly acted upon. Connecting these critical insights to the IIL/ISA debate, this work concludes: (1) that jurisprudential attempts to downplay the role of politics in the law do not live up to the challenges posed by IIL/ISA reform; (2) that reform approaches predicated on such premises are ultimately unable to solve the problems of legitimacy of ISA; and (3) that the shortcomings exposed call for giving serious consideration to the constructive elements of critical jurisprudential alternatives that require the rearrangement of traditional understandings of doctrinal legal method[s] and decisionmaking in ISA.
In the main, the indeterminacy critique propounds that legal materials per se are unable to determine the outcomes of legal interpretation and decision-making which ultimately depend on the collective ethical/political tendencies of historical ruleapplier communities prompting a critical rethinking of rule-applying institutions, processes and outcomes (cf. e.g. [7, 68ff, 13, 28f, 26, 100ff, 72, 45ff, 76, 394ff, 79, 157ff, 308ff, 128, 957, 152, 5ff]). While mainstream jurisprudence appears to have successfully accommodated the indeterminacy thesis and deactivated critical questions about the legitimacy of rule-application and rule-appliers [145, 86ff], the controversy is far from settled and discussions resurface routinely across different areas of the law about the scope and consequences of the problem of legal indeterminacy [15,23,58,110,117,118]. As this work shows, although certain approaches both in general jurisprudence [3,91] and IIL [22, 40, 98, 149, 115ff] take this critique partially into account, they are ultimately sterile due to their failure to identify and keep in check the main consequence of indeterminacy within the theory and practice of IIL/ISA, i.e. the centrality of ideology-understood as the legitimation of systematic and unjustified power asymmetries through "the way meaning is generated, conveyed, apprehended and appropriated in particular contexts" [93,112]. 4 Admittedly, there are limitations in the use of the term ideology as an analytical tool that have been pointed out by critical scholars (e.g. [64, 12f, 79, 286f]). Legal "[d]ecisions are predicated upon a complex mixture of social, political, institutional, experiential, and personal factors …" [70,14] that cannot be reduced to totalizing claims about the homogeneity and causality of any deep-structure-be this "capitalism" for the left or "efficiency theory" for right-wing (neo)liberals/conservatives [79,287]. This article, therefore, does NOT envisage the term in this strong systematizing sense. Rather, ideology is understood here as a tool to analyze certain legal ideas and practices (judicial and jurisprudential) in connection to their consequences in the global socio-political context, i.e. as a set legitimizing strategies of a particular (contingent) status quo [79, 288f, 293f]. More specifically, this article points at the well-established connection of ISA's legal strategies with the neoliberal political-economic discourses and practices described as financialization and marketization of the global economy and the consequences thereof, especially in terms of actual substantive shifts in the structures of social, economic and political power across the globe (see Sects. 3.2, 4 below).
In this sense, it is useful to note that much of the quarrel about the reference to ideology in the study of ISA seems to derive from its application by empirical surveys in connection to the unwarranted assumption that there is a "correct" interpretation of legal materials lurking in IIL from which arbitrators would deviate due to "extra-legal" factors [52,267,168,234]. Far from these or any other assumptions about supposedly "objective" interpretations of the law or the existence of a "neutral" stand-point in legal decision-making, this work draws on the notion of ideology as a tool to understand and explain widely-acknowledged rhetorical lines and doctrinal patterns identified in the theoretical construction and the practice of IIL and ISA and link them to a broader jurisprudential problematic (see Sects. 2, 3.1 below).
Consequently, this article does not look at the ideology of individual arbitrators, but at the ideology of ISA as a community that produces a legal (rhetorical) practice geared towards the legitimation of the particular elements of neoliberalism already mentioned. When looking at rhetorical patterns identified in ISA-in contrast to the New Rhetoric approach whose reference to social reality is "at best partial and obscure"-the perspective adopted in this work suggests that the study of the law is "to treat the rhetoric of law as a primary datum to be evaluated […] against the background of the institutional power and social relations of inequality, of superordination and subordination, that underpin that rhetoric and determine its semantic content[…]" [53, 123f]. 5 Since the 1990s the main jurisprudential responses to the critical indeterminacy thesis have concentrated on an attempt to assimilate the critique by trying to demonstrate that legal indeterminacy is merely relative and solvable [86,998,91,26]. In this endeavor, mainstream jurisprudence has lowered the degree of legal certainty that classic positivism required as a feature of the rule of law and replaced it with a nuanced acknowledgement of the argumentative nature of the law that, they suggest, can be harnessed in turn by the doctrinal development of disciplinary boundaries and legal reasoning constrained by coherent professional conventions-perceived as radically different from unconstrained ideological or political debate [2, 212ff, 3, 185f, 39, 1f, 91, 26-31, 189ff, 113, 337ff, 353f, 145, 88f]. This revised version of the rule of law offers predictability based on a professional consensus the legitimacy of which is principally measured and controlled by its coherence and persuasiveness within the interpretive community of rule-appliers-who are in turn characterized by their professional and ethical integrity [145, 88, 90, 91, 27, 203, 3, 182ff]. The effort to assimilate legal indeterminacy into mainstream legal discourse has led to a widespread interest in hermeneutics, liberal pragmatic jurisprudence, legal rhetoric and the question of how "the art of interpretation" can be best "operationalized" in practice by different groups of rule-appliers so as to achieve a variety of policy goals ( [158,587]; cf. also [73,90]).
However, the serious shortcomings of these assimilation attempts become apparent in relation to the legitimacy crisis of IIL/ISA bringing the predicament of legal indeterminacy and its critical implications back into focus. The practical and theoretical neglect of the role of ideology and group bias in rule application as the ultimate effect of indeterminacy renders ineffectual mainstream recipes to control professional communities of rule-appliers and the extra-legal sources that inform their professional conventions. Even when the critical gist of legal indeterminacy is somehow addressed-e.g. through the abstract promise of ideologically balanced assessments in the application of the law [91, 171ff]-, the main jurisprudential strategies for the control or scrutiny of rule-appliers fall short of actually dealing with it. In the face of such shortcomings, mainstream jurisprudence falls back on an unwarranted trust in the ethical qualities and the ability of individual rule-appliers to fully understand the legal and extra-legal ideological influences dominant in their profession and remain critically independent from them. 6 In the final analysis, reform attempts based on such premises remain blind to how indeterminacy is being mobilized by local and global neoliberalization forces to justify and retain a specific set of policies deployed during the last 50 years [16, 10f] often against popular will [60, 161ff].
In order to unpack these issues, Sects. 2 and 3 elaborate the argument that the origin of the legitimacy problems of IIL/ISA and the inability of reform attempts to solve them are connected to the jurisprudential failure to accommodate the critical indeterminacy thesis in a way that adequately accounts for the role of ideology in rule-application. Section 2 briefly examines the main jurisprudential attempts to curb the indeterminacy critique and Sect. 3 illustrates the failure of such attempts in relation to IIL/ISA. Finally, Sect. 4 suggests that the strong ideological traits that can be found in IIL/ISA continue to be presented as "non-political" mainly due to the lack of awareness of the relevant professional communities and their "background assumptions" under mainstream jurisprudence which also leads to a lack of meaningful control of ideology in doctrinal work. This section also suggests possible directions to overcome the methodological difficulties derived from the indeterminacy challenge.

The Critical Indeterminacy Challenge and the Main Jurisprudential Responses
It is not the aim of this work to review the massive body of literature dealing with the issue of legal indeterminacy from a critical perspective. 7  to the indeterminacy thesis in their own terms, this article follows the taxonomy advanced by Kutz that distinguishes between semantic, systemic and normative indeterminacy within the law [86]. All these forms of indeterminacy, proponents of the critical perspective claim, expose the central role of the political and moral tendencies and biases of professional interpretive communities in the application of the law [18] which result in a challenge to the rule of law ideal as a politically neutral system for justifying the exercise of public authority [9, 761ff, 777ff, 135, 42f].
Although mainstream jurisprudence has not replied in a uniform manner to the challenge, 8 this section studies the main attempts to deactivate the critical kernel of the indeterminacy thesis. These attempts try to demonstrate that, while politics and ethics play a role in the consensus of professional communities, rule-appliers are always controlled by internal and external mechanisms of scrutiny upon which their legitimacy would rest. After defining more in detail what types of indeterminacy the article explores in relation to IIL and ISA, i.e. semantic and systemic indeterminacy, 9 this part examines the main arguments against the critical indeterminacy thesis and points at some of their shortcomings that will be tested and further elaborated upon in Sects. 3 and 4.

The Challenge of Semantic and Systemic Indeterminacy
As far as the elements of IIL studied in this work are concerned, semantic indeterminacy can stem both from the vagueness or "open texture" and the ensuing "contextuality" of legal language as well as from the very source of words' meaning in general [86,[1004][1005][1006][1007][1008][1009][1010][1011][1012][1013][1014]. First, the vagueness of legal language as a source of indeterminacy is a pervasive feature of law that acts above all in the application of the law and goes beyond the problem of factual determination. In other words, vagueness implies that the applicability of a legal term (e.g. "fair", "equitable", "treatment", "reasonable", etc.) to a particular situation is indeterminate and, contrary to what some scholars have suggested [54, 35, 281f], more factual investigations cannot help determine its content which requires a decision to expand or reduce its scope of application [86, 1004f]. Second, as pointed out by thinkers like Wittgenstein and Derrida, language cannot be understood as a list of rules or codex that tell us what meaning we can extract from words for this view cannot explain the room for play and innovation undeniably present in language ( [164, para.151, 185, 201]; cf. also [30,142]). 10 10 About the use of the linguistic concept of code in law and its semiotic problematic, cf. [53, 65ff]. 8 Jurisprudential reactions range from assimilation to neglect to denial [79, 192ff, 105, 709ff]. While part of legal theory today and most of legal practice downplays or overlooks the issue of indeterminacy and its effects [88,5,145,90,95,257], some legal scholars still fully reject legal indeterminacy and the notion that values, extra-legal theories and policy discussions inform the interpretation and application of the law [158, 586, 15, 80f]. 9 Although normative indeterminacy as formulated by Kutz [86, 1020ff] is arguably the most powerful part of the critical indeterminacy thesis [72,13,80], its relation to IIL/ISA is studied elsewhere.

Indeterminacy, Ideology and Legitimacy in International…
Rather, our ability to generate meaning from words in new contexts seems to derive from the stable sharing of interests, understandings, judgments and a "form of life" among language users [164, para. 241f]. 11 In view of these features, semantic indeterminacy represents a serious problem for legal justification because it renders the logical cogency of syllogisms ineffectual as a direct link between the legitimacy of the legislator and judges' decisions owing to the fact that the minor premise becomes in a pervasive manner a matter of judicial discretion detached from any nontrivial democratic legitimacy ( [86,1006]; see also [112, 833ff]). Similarly, the notion that meaning stems from sharing certain views and understandings within a community of users raises a crucial question regarding the role of dominant views and tendencies in a particular community-which may provide for predictability but are hardly a source of legitimacy [135, 19ff].
Adding to the semantic challenge, systemic indeterminacy emanates from the dependence of interpretation on "background assumptions" and the use of nondeductive reasoning in legal argumentation [86,[1014][1015][1016][1017][1018][1019][1020]. First, background dependence derives from our need to rely on conventions or "environmental clues" to guess the meaning given to words by other speakers [86,1015]. Yet, the context or facts upon which meaning is based are already mediated by our often unstated practical and theoretical assumptions or "frames" that give the impression that our legal conclusions are inevitably deduced from the law preventing the political and value assumptions involved in such "framing" operations from surfacing and being debated [69]. Second, argumentative indeterminacy arises from the use of techniques of practical reasoning or rhetorical argumentation 12 that, even if crucial to achieving persuasion in the practice of lawyering, do not determine decision-making the way logical deductions appear to do [86, 1017f]. It is easy to see how the possibility of selecting among factual frames and non-deductive arguments renders law's materials seemingly incapable of determining legal decision-making by any distinctly nonpolitical methodology [70, 4f, 14f].
These types of indeterminacy expose rule-application as law-making and pose a legitimacy challenge to rule-applier communities and their professional conventions as the ultimate law-maker [79, 228ff] that should be subject to effective scrutiny and control by rule of law standards. 13 Although the dominant jurisprudential responses to this critique have been successful within the context of national legal systems in partly averting the challenge, their weaknesses become painfully apparent in an area-international law-for which they were not primarily devised.

Main Jurisprudential Responses to Critical Indeterminacy: Control of Professional Conventions in Denial of Ideology?
Whereas part of Western jurisprudence has fully rejected the critical indeterminacy thesis [166], meaningful engagement with this notion is not uncommon in current scholarship [158]. Among the latter position, responses have mostly come from liberal pragmatics [3,112], interpretivism (e.g. [37]; cf. also [143]) or hermeneutics [73,95], though other contributions pick elements from diverse strands and are difficult to classify (e.g. [91]). From these different reactions one can extract a short catalogue of the main arguments in support of the notion that indeterminacy is merely relative and, in any case, solvable. Owing to their relevance for the IIL/ISA debate, this section briefly considers the rationality of legal argument, coherence, the possibility of revision or "defeasibility" of professional consensus and the ultimate reliance on the ethical qualities of professional communities of rule-appliers. One of the main contentions that detractors of the critical indeterminacy thesis advance is that neither semantic nor systemic indeterminacy have the effect of cancelling the possibility of rational argument and reflection-as distinct from purely conventional discourse or sheer group conformity-so that doctrinal tools of legal reasoning continue to be perfectly well-suited to produce rational justification and persuasive or "defensible decisions" [86, 1007, 1011ff, 1016, 91, 203]. However, both persuasiveness and "being reasonable" are in essence predicated on the previous "critical ranking of relevant values" operated by rule-appliers within a professional community with very nebulous limits in practice [91,173]. Hence, in order to make up for this weakness, the reference to "substantive rationality" is buttressed with a general appeal to coherence [86,1010,1017, 1019, 91, 189ff, 37, 112f, 124, 158]-a crucial source of persuasiveness and legitimacy in modern societies [48, 30ff, 38ff, 39, 11ff].
Yet, reliance on coherence to curb the effects of indeterminacy presents at least two problems. First, coherence is hard to reconcile with parallel jurisprudential efforts to mitigate indeterminacy and increase predictability by developing highly structured systems of legal doctrine [3, 181ff, 39, 12]. The construction of disciplinary boundaries is meant to reduce the amount of rules potentially applicable to a particular case diminishing the potentiality of conflict between different rules and principles and, thus, constraining the choices available to rule-appliers [39, 6f]. 14 But this effort simultaneously reduces coherence between different, ever more dislocated normative areas [39, 10f]. In other words, more determinacy can only be achieved at the cost of reducing coherence and vice versa [39,20]. And second, coherence is not equated with non-contradiction, but conceived as "making sense" by a value or set of values that can be traced back to some image of "a satisfactory form of life" [91,193], thus, slipping back to the issue of dominant political and moral value preferences in a rule-applier community.
Consequently, resort to rationality and coherence is ultimately dependent on the relevant professional communities' "shared, natural patterns of affect and reaction" [86,1011] and the extra-legal sources they are willing to rely upon, including e.g. different economic theories [91,188]. Against the obvious risks generated by reliance on relatively small and unelected professional groups, mainstream jurisprudence points at different means of control internal and external to the community. The main internal control mechanism would be the possibility of reexamination of legal decision-making and the defeasibility of professional consensus through the evaluation of the rationality of conflicting arguments and choices [86, 1017, 1019f, 91, 237ff]. Yet, if the existence of dominant understandings and visions of life is the main source of meaning and a defining feature of professional communities, this appeal to self-referential scrutiny seems somewhat circular, at least with regard to the most basic collective assumptions and beliefs that grant access to or membership in the community. One does not need to doubt the moral integrity of individual rule-appliers to see how the resort to professional ethics as a solution to this selfreferentiality [145, 88-90, 91, 27, 3, 182ff] bends the question about the necessary modes and scope of effective scrutiny of a professional community's background understandings, especially as such community understandings tend to "naturalize" particular power relations and produce the cognitive exclusion of non-mainstream alternatives [79, 292f].
Regarding external forms of controlling rule-applier communities, there is the notion that the presence of extra-legal grounds in rule-application can be justified provided that they have some connection, even if tenuous or weak, to previous legal materials-which include not only statutes, but all sorts of legal history, especially judicial precedents, principles, policies, etc. Such connection would establish a sufficient link between rule-appliers and the legislator's legitimacy for in such case the former would be choosing between values already legitimately "woven into the fabric of the law" ( [91,188,203]; cf. also [37, 153f]). Yet, this misses the point of the indeterminacy challenge which does not so much posit that rule-appliers will choose just any value, whether it is vaguely derived from legal materials or not. On the contrary, the gist of the critical indeterminacy thesis is that precisely such legal materials already give plenty of room for powerful group biases and strategic reasoning by rule-appliers providing ample basis for judicial law-making with the concomitant risk of strategic use for dominant class interests [7, 73, 63, 16f, 31, 79, 155f, 162, 180ff, 228f].
However, this possibility is denied by opponents of the critical indeterminacy thesis for two reasons. First, judges simply do not make law; they just produce a collection of discrete decisions that, precisely because of the contingency generated by relative indeterminacy and the lack of generality of such decisions, only amount to a legitimate discretionality that is inevitably embedded in any legal system operated by humans [91,170,106,671]. And second, mainstream jurisprudence puts strong emphasis on the possibility of public, rational scrutiny as a means to guarantee legitimacy and avoid abuse of such powers [49, 50f, 86, 1022].
This section has briefly presented the critical indeterminacy thesis in some of its forms and the main counter-arguments advanced to solve the challenge. These arguments propound the assimilation of indeterminacy into the unaltered operation of the law by relying on the rationality and coherence of legal work and celebrating the positive "function" that indeterminacy fulfils within pluralistic liberal legal systems [91, 26f, 88, 1f]. The collapse of all means of indeterminacy mitigation into the professional conventions of interpretive communities of rule-appliers is justified by the denial of judicial law-making and reliance on means of control like defeasibility and rational scrutiny over legal justification. The next section takes a closer look at how semantic and systemic indeterminacy actually unfold in IIL and how the jurisprudential explanations described here fail to account for the role played by ISA in IIL before advancing some conclusions.

Indeterminacy and the Politics of IIL-The Law-Making in ISA
There is an apparent paradox in talking about judicial law-making against the backdrop of legal indeterminacy. If legal texts are generally indeterminate, judicial texts cannot be more determinative of legal outcomes than statutory or treaty rules. In this sense, judicial decisions would only amount to a collection of discrete decisions that could never really produce a general legal policy. However, the notion of judicial law-making in this context does not imply that the texts of arbitral decisions are more determinate than the treaty law they are connected with. Rather, this notion points at the fact that the predictability associated with the rule of law does not depend on treaty texts or arbitration precedents-which are always open to reinterpretation in relation to every new case which accounts for the actual diversity in arbitration outcomes-, but on stable understandings and tendencies within the ruleapplier community that are expressed in the specific patterns of meaning and visions of human life and global governance embedded in ISA.
In order to establish these points, this section first identifies the indeterminacy present in IIL through the study of one of the central pieces of investment protection, the "fair and equitable treatment" clauses [32,33]. It analyzes how informal and massive reliance on arbitral precedent becomes the main tool in the attempt to provide stability of meaning in IIL [42,98] which is directly linked to the claim of arbitral law-making. While commentators try to rationalize and legitimize this in different ways, the very features of arbitral precedent-also riddled with semantic and systemic indeterminacy-point further at the ISA community and its "background assumptions" as the ultimate source of meaning in IIL [153].

"Fair and Equitable Treatment" (FET) Clauses and the Use of Precedent in ISA
Within the complex net of bilateral and multilateral investment agreements that make out the international investment protection regime today, FET has arguably become one of the main elements in terms of its practical application in ISA and its use by global investors to shunt state policy [150,10,39,33,10]. 15 Formally, like most other core norms of investment protection, 16 FET clauses are crafted as legal standards that rely on broad and open-ended notions such as "fair", "equitable" and "treatment". 17 According to the indeterminacy thesis, standards are essentially informal, general policy commands, as opposed to supposedly mechanically applicable rules [72, 15, 77, 1695ff, 1710f]. Although the legal form of a standard allows for more policy flexibility, it also stands in a relationship of tension with the rule-oflaw commitment to eliminate arbitrariness in the application of rules as a way to contain public power and safeguard some room for individual freedom [49, 39ff, 91, 25f, 147, 8f, 12]. This generates instability, oscillation and unsettled doctrinal conclusions due to logically or empirically unanswerable problems that always provide for a variety of plausible expansive or restrictive interpretations [72, 15f, 69, 252ff].
This exactly is what one can observe in the operation of FET in IIL and ISA practice [150, 10ff, 63, 92, 23ff].
Although the FET standard is articulated in somewhat different terms in the thousands of international investment agreements (IIAs) in force today, the diversity of such formulations can be reduced to two main types of clauses: on the one hand, FET combined with the international minimum standard of protection of foreign citizens (MST) or with a general reference to public international law standards (PIL); and, on the other, FET standing alone [36, 2, 149, 50ff]. Both types of clauses are riddled with uncertainty of meaning in relation to their content and scope as both formulations allow for different and inconsistent approaches [150, 59f]. In practice, no uniform interpretation can be guaranteed by textual formulations even for clauses of the same type and wording [150,8]. For instance, FET combined with MST or PIL has produced a confusing case-law as MST itself is an incomplete, vague and unclear standard derived from international customary law [36,2,150,6,9,22,60,125,152]. 18 And FET standing alone-which can also be interpreted as equivalent to the MST [125,153] 19 -is even more flexible and expansive [150, 6, 59f].
Scholars and arbitrators have tried to construe a homogenous content for FET by selecting some elements from a growing body of arbitration precedent and rejecting alternative interpretations that exist within that body by presenting them as illconstrued or less frequently upheld by tribunals [33, 14f, 42, 334ff, 98, 283ff, 165, 247ff]. However, such discarded items usually prove to be perfectly correct or "reasonable" approaches to each point of discussion that cannot be fully ruled out based on the available legal materials alone. More importantly, even when one looks into the elements that make out an interpretation of FET presented as "correct", they only refer forth to other equally vague notions that reproduce exactly the same problem of indeterminacy they try to solve in the first place. For instance, an element that is usually expected to endow FET with some stable substantive content is the notion of "legitimate expectations" which protects investments during their lifetime from the negative impact of changes in the domestic business and legal environment caused by state measures and policy modifications. 20 Whether or to what degree foreign investments are protected by FET depends on what kind of investors' expectations and state policy changes are considered legitimate [150,64]. But there are different, equally rational approaches to answering these questions.
On the one hand, some arbitral decisions adopt different variations of the socalled Tecmed 21 doctrine which interprets the legitimate expectations of investors as a right to enhanced legal certainty and stability against virtually any adverse change in the legal environment and requires the highest level of domestic legal predictability, consistency and transparency from states to the point of freezing state regulatory powers with respect to foreign investors. 22 On the other hand, in order to moderate the political effects of this doctrine scholars and tribunals try to develop further qualifications for the doctrine of legitimate expectations. Here again there is a variety of doctrinal alternatives.
For example, one such qualification connects the notion of "legitimate expectations" to "reasonableness" that is defined by reference to the domestic context taking "all circumstances" into account. 23 Reasonableness is also defined sometimes by reference to "due diligence" which requires from investors a higher level of awareness about the political and regulatory local environment. 24 Another way of qualifying "legitimate expectations" is by linking them to specific representations or actions 20 Although strong arguments against"legitimate expectations" doctrine as an element of FET are also available cf. AWG Group v. Argentina, UNCITRAL, Judge Nikken's separate opinion to Decision on Liability, 30 July 2010. 21

Indeterminacy, Ideology and Legitimacy in International…
taken by states to attract investments. 25 However, these representations can be limited by tribunals to specific contracts, licenses, permits, etc. 26 or expanded to include any implicit state measure intended to entice foreign investment. 27 The timeframe available to establish such representations is also flexible. While it is sometimes limited to the moment the investor decided to invest 28 ; in some cases such representations are established at a later point in the life of the investment. 29 Another doctrinal alternative is the "balancing" of investors' legitimate expectations against the legitimate regulatory goals of the host state. This balancing doctrine proposes different possibilities to assess the "reasonableness" of state measures "in light of the circumstances" in the host country. 30 The vagueness of these notions, however, can hardly be corrected by additional references to principles such as "bona fide" 31 or proportionality 32 as a measure of legitimate state action. Furthermore, the balancing test can be dismissed by tribunals if specific representations issued by the state are construed as constituting the terms or circumstances of the investment. 33 A further element that can well illustrate the scope of the FET standard's indeterminacy is the so-called "liability threshold" which defines the minimum level of seriousness of a breach committed by the state required to establish a violation of FET and trigger legal responsibility [150, 12ff]. In other words, although any type of state action or omission can potentially constitute a breach of FET, not every breach will generate liability. Here again, FET provides no clear benchmark and a variety of outcomes and interpretations is possible based on same or similar wording of the FET clauses [119, 24, 150, 13, 87f]. If FET is connected to MST, it may result in a higher threshold. 34 However, the MST offers an unstable basis that refers forth to terms such as "egregious", "manifest" or "flagrant". These controlling notions open a wide space for factual interpretation especially as such standards are subject to 25  evolution and may occasionally be taken to imply more stringent conditions of scrutiny on state actions today than they did a century ago. 35 On the other hand, when FET is interpreted in isolation from MST the threshold is even less clear [150,88].
Another attempt to fix the scope of FET is the inclusion of additional content in the text of IIAs. Some recent IIAs explicitly mention specific elements of FET such as denial of justice, breaches of due process and manifest arbitrariness among other notions. 36 However, these enumerations may not always be considered as a closed list-a position that would allow for expansive interpretations [150, 29f]. And, even where the additional texture of FET in IIAs is taken as a closed list, the notions they contain are often just equally flexible and indeterminate themselves, especially as the weight given to domestic circumstances in delimiting each one of them is always uncertain [150, 33f].
In sum, as they try to stabilize and specify the vague content of FET, arbitral doctrines and treaty innovations fall into the infinite regress described by the critics [128, 943f]. They refer back and forth to equally vague notions such as good faith, legitimate expectations, proportionality, domestic context, etc. which, when one tries to pinpoint their content, lead in turn to further open-ended notions and standards. 37 In addition to the fact that these terms may raise quite different expectations depending on the cultural background or legal tradition of the actors involved in the process [119,24], the latent possibility to expand or restrict the conceptual meaning and factual scope of application of these concepts produces a permanent oscillation between "subjective" arguments about the actions of the investor or the legal measures and attitudes adopted by the state on the one hand and, on the other, "objective" arguments about international standards and domestic circumstances (economic, social, political or legal). This oscillation allows for a wide range of solutions based on the same legal premises despite the intensive use of legal precedent.

Precedential Indeterminacy and the Politics of ISA
The conclusions of the analysis above unfold on two different levels. First, on a more descriptive note, it corroborates that the "open texture" of investment treaties [22, 160ff, 47, 1585f, 92, 19, 98, 290ff, 167, 17, 21] amounts to a serious and pervasive issue of semantic and systemic indeterminacy and illustrates the widespread use of arbitral precedent as a legal source of paramount importance in IIL and ISA [42, 333ff, 98, 285ff, 153, 281ff]. Second, and more significantly, it shows how even the 35 LFH Neer and Pauline Neer v Mexico (US v Mexico) (1926) 4 RIAA 60, pp. 61f. 36 Cf. e.g. Article 2.5 of EU-Vietnam Investment Agreement (2019) at https ://inves tment polic y.uncta d.org/inter natio nal-inves tment -agree ments /group ings/28/eu-europ ean-union -; and Article 5(3) of the United States of America Model BIT (2012) at https ://inves tment polic y.uncta d.org/inter natio nal-inves tment -agree ments /model -agree ments . 37 This is the case even in more properly technical questions different from economic discourse. For instance, in the context of environmental regulation, though reasonableness is normally construed on the basis of procedure, rather than scientific correctness, "[i]n dealing with process issues, the international tribunal will walk a fine line between adjudicating legal claims and deciding scientific disputes", [101,49].
Indeterminacy, Ideology and Legitimacy in International… use of arbitration precedent cannot per se solve the problem of indeterminacy pointing directly at the ISA community and its background assumptions as the ultimate source of predictable meaning in IIL.
There are in IIL scholarship different justifications of the central role of precedent in arbitral practice. On the one hand, in line with the jurisprudential mainstream examined above, there is a widespread "pragmatic formalism" that denies the value of arbitral precedent as a formal source of IIL and pays lip service to the formal subsidiary role of "judicial decisions" in PIL (Article 38.1.d. of the Statute of the ICJ), while heavily relying on precedent in practice as an informal primary source [153,[277][278][279][280][281]. On the other hand, a few scholars suggest that the use of standards in IIL implies a "delegation of legislative authority" by virtue of which arbitration tribunals become a legitimate law-making authority in defining the meaning and scope of investment protection standards [19,66,98,281]. Whatever the position in this regard, the underlying general assumption is that the coherent and consistent use of arbitration case-law can provide some determinacy and constrain the power and freedom of interpretation of arbitrators bringing predictability and legitimacy to the investment regime [98, 285ff]. 38 This implies the recognition of the indeterminacy of investment treaties coupled with the claim that precedent can deliver a measure of objectivity and technical necessity that would derive from the spirit of this "jurisprudence constante" [14]. 39 And so, a large body of arbitration awards has become the main source of IIL in practice.
However, as recent debates at UNCITRAL Working Group III for investor-state dispute settlement reform (WGIII) show, one of the main problems that IIL reformers have identified is precisely the lack of consistency and coherence of investment arbitration outcomes that, despite the use of precedent, affects even the interpretation of same or similar investment treaty provisions. 40 This confirms that the idea of a necessary meaning based on a previously assumed objective or inherent content deeply embedded in arbitration precedent is not tenable. Not only offers arbitration precedent a variety of distinct and equally reasonable doctrinal possibilities; the formal and factual scope of each doctrine can be reasonably broadened or narrowed to support different values and objectives in every case [150,11,13]. 41 As a result, the massive use of arbitration precedent fails to solve the indeterminacy of investment treaties owing not only to discrepancies between different arbitration doctrines, but 38 Report of UNCITRAL Working Group III [Investor-State Dispute Settlement Reform] on the work of its thirty-fourth session (Vienna, 27 November-1 December 2017)-Part II (A/CN.9/930/Add.1/Rev.1), para.11. 39 In this large pool of arbitral decisions arbitrators and scholars search through to define "common strands and directions in cases that would shed light on the meaning of the FET obligation" [150,43]. 40 A/CN.9/930/Add.1/Rev.1, para 9ff, 15f; cf. also [130]. 41 The indeterminacy of investment legal materials renders it necessary for international arbitrators to resort, for instance, to purposive reasoning (cf. e.g. Suez, Sociedad General de Aguas de Barcelona S.A. and Vivendi Universal S.A. v. Argentina Republic (ICSID Case No ARB/03/19), Decision on Liability, 30 July 2010, para. 218; and [146, 58f, 63]) which restating the classic indeterminacy thesis, no matter how much self-restraint arbitrators may display, implies discussions about policy goals that are grounded in different ideas about substantive justice-an indeterminate notion itself [151, 197f, 10, 156]. also due to disagreements on the meaning and scope of each of those doctrines. 42 The proposal to reduce emphasis on coherence and consistency in the use of precedent in ISDS 43 is not only a recognition of the indeterminacy problem; it is also bound to exhacerbate the incoherence of IIL vis-à-vis other branches of international law as illustrated by the controversies regarding the position of human rights-especially economic and social rights of local populations-and the environment in relation to foreign investment protection [1,6,83,109,140,165]. 44 However, for all the indeterminacy of IIL materials and the incoherence of ISA outcomes, investment arbitration precedent is not just a collection of contingent decisions disconnected from each other. There actually are some professional conventions that generate stable practices and patterns of meaning within ISA. 45 For instance, one such pattern is the "failed law premise", identified by Ureña, whereby investment arbitration usually follows a narrative that "features domestic law as failed (or about to be), and therefore in need of correction or complement by the investment tribunal." [153,300] 46 This general pattern hinges on an entrenched disregard for domestic law [100, 246, 167, 19f] and is closely linked to a well-documented tendency of investment tribunals to find developing states in breach of their investment protection obligations significantly more often than developed states [12, 411, 43, 59, 132, 1157ff]. Through the analysis of this tendency, Odumosu identifies three technologies or strategies frequently deployed by investment tribunals which encompass: the exclusion of any genuine participation of grassroots movements from host societies that is not mediated by NGO workers "socialized" in IIL 47 ; the systematic treatment of public interests as a private property issue 48 and, finally, the purported separation of investment law from its serious socio-economic, political and cultural ramifications under the slogan of "depoliticization" [99, 263ff]. 49 42 As Beckett explains, there is no better proof of indeterminacy than the scholarly and institutional efforts to "correct" it by advancing alternative interpretations and generating a variety of equally plausible arguments that intensifies the very problem they try to solve [10, 150f]. 43 A/CN.9/930/Add.1/Rev.1, para. 11, 17, 20ff. This attempt, however, is unlikely to succeed due to the potential application of the "Most Favored Nation" (MFN) standard [36]. 44 Given the difficulty in setting a clear measure for the demand of coherence [37, 1997, 105ff, 2, 213, 91, 190], any conspicuous lack of it raises a number of questions that potentially undermine the legitimacy of the law-and of rule-appliers, cf. [118, 344ff]. 45 Though not specifically dealt with below, such patterns are closely linked to the professional and institutional policy dynamics that drive the investment arbitration industry, cf. [38, 12ff, 141, 240ff]. For an analysis of bias in ISA as an institutional effect, see [17, 572ff, 43, 37]. 46 For a somewhat nuanced example of this narrative in IIL scholarship, cf. [132, 1161f]. 47 Despite limited participation as amicus curiae, "the Cochabamba protests were as close as one usually gets to hearing the subaltern's voice in the foreign investment law debate" [99,260,265]. On the general lack of standing of citizens affected by investment in arbitration proceedings, cf. [46]. For a more comprehensive treatment of the narrow participation of the population of developing countries in ISA, see [65, 206ff, 120, 121f]. 48 Also connected to the disciplinary sensibility and techniques habitually deployed by those involved in arbitration regardless of their personal beliefs [133,468]. 49 This is operated through the misrepresentation of the exclusion of interstate politics as the exclusion of all politics, cf. e.g. [84, 111, 48ff, 4, 975]. Such strategies also typically include the use of certain notions of economic "efficiency" which tend to discard other values and goals [157].

Indeterminacy, Ideology and Legitimacy in International…
Nevertheless, these and other patterns in investment decision-making are indicative of a political orientation intended or unintendedly aligned with neoliberal postulates [114,134,576,138,163,23]. Legal discourses that deal with economic matters of the highest social and political importance through the narrow lens of individual private property [6, 2804f, 107, 676ff, 693, 133, 452ff] and construe corporate capital rights as universal, fundamental rights [97,243] while weakening public protection of the environment 50 and the rights of local populations in the name of global free movement of capital [27, 488, 107, 679ff, 692, 155] 51 give expression to a political economy that promotes the marketization of all human transactions on a global scale and the privatization of governance across borders through a "polycentric web" of international rules and non-state institutions that displaces and alters traditional state goals and structures [47, 1521f, 1544f, 1625, 60, 3f, 7, 72-78, 126, 418ff, 136, 271f, 160, 4f]. 52 These features expose two central aspects of ISA. First, in view of the fact that such arbitration parterns do not stem from the indeterminate IIL materials themselves, their source is revealed within the "background assumptions" and stable sharing of interests and understandings that define this community of IIL language users, i.e. the interpretive community of ISA itself. While this may offer a modicum of predictability or stability of meaning, 53 the heavy impact of ISA on domestic and global public interest and policy [126, 409ff] operates a massive power-shift from sovereign states to the ISA community transferring in practical terms a broad 50 For instance, the neglect of environmental aspects may take place through the narrow construction of the possibility for states to raise counterclaims, cf. [67, 33f, 36f]. For more information about the shortcomings and possible reform of state counter-claims within the UNCITRAL system, cf. UNCITRAL Working-Group III reports on Multiple proceedings, reflective loss and counterclaims by respondent States, available at https ://uncit ral.un.org/en/multi plepr oceed ings. 51 Since state intervention and social and environmental protection are closely intertwined, any state measure can potentially be construed as impinging on free market goals, cf. e.g. S.D. Myers Inc. v. Canada, UNCITRAL Rules (NAFTA), First Partial Award, 13 November 2000, 40 ILM 1408, para. 155 (holding that domestic environmental protection measures which indirectly strengthen local industry are an unlawful means to protect the economy). This effect also derives from the increased resort to secret settlement of arbitration claims, cf. [57, 28ff]. 52 Though neoliberal discourse is not homogenous, the dynamic interaction between global economic postulates, local manifestations and reform rhetoric to achieve a "better neoliberalism" produces a certain "economic logic" that converges around the myth of global free economic transactions [160,6]. Whereas the main policy result of it is the creation and maintenance of a particular system of wealth accumulation that favors the interests of a small part of society [60, 19, 31ff], the justification of the ideas and dehumanizing practices involved is deployed through the "depoliticizing, naturalizing and ritualizing functions" of a rhetoric of sacrifice that would lead to the quasi-scatological advent of the free-market based "good life" [160, 7f]. For a more in-depth study of how neoliberal ideology is reproduced in dispute resolution mechanisms outside the state masking power asymmetries and advancing the criterion of "utility maximization", cf. [25, 63ff, 67, 69]. 53 This also explains why investment arbitrators seem to experience some sort of constraint in their work. As one FET expert would put it in relation to the use of precedent, "[d]espite many fears-namely, that the standard would offer an enormous discretionary power to the arbitrator-the arbitrator is in practice controlled in his discretion by this objective element. His margin of manoeuvre is much more limited in practice than in theory." [149,133] That the source of constraint claimed by experts and arbitrators is mistaken -as demonstrated above-does not necessarily entail that such feelings of constraint are merely dellusional or intentional misrepresentations. law-making authority from the former to the latter [98, 300, 122, 179f, 188ff, 153, 295ff]. This, and not the indeterminacy of IIL, is the actual source of illegitimacy [47,1585]-along with the substantive outcomes of such patterns. And second, these patterns and the way they are produced are highly problematic in terms of the rule of law ideal for, no matter what the personal ethics or beliefs of arbitrators, they actually serve to advance a particular politics as "non-politics" which makes ISA virtually impervious to other views of the world, society and human life characterizing ISA as a technology for the implementation and legitimation of such politics.
The last section considers how the problems discussed above thwart the traditional means of control over rule-applier communities advanced by mainstream jurisprudence undermining the legitimacy of ISA by mainstream rule-of-law standards. Finally, it propounds that only the incorporation of some form of ideology critique into such scrutiny efforts can potentially help address these shortcomings.

Legitimacy as Review and Rationality Control in IIL/ISA? The Rule of Law as Ideology Critique
The notion that the predictability of meaning associated with the rule of law derives from the "consensus, concerns and boundaries" existent within the "international collegiality of elites from different countries" is, of course, not new in international legal theory [154,480]. 54 Neither are international lawyers unfamiliar with the idea that such interpretive or professional communities produce strong "structural biases" [55, 121, 247, 10, 152, 82, 598ff]. 55 And, as a matter of fact, the existence of a specific interpretive community of rule-appliers in ISA has been abundantly confirmed by empirical research showing the intellectual homogeneity [38,115] and collective tendencies in decision-making of investment arbitrators [17,43,156,137,31]. Moreover, there have been calls among international scholars to take seriously the study and scrutiny of "background factors of interpretation" that act as the fundamental framework of legal reasoning and decision-making, yet little progress has been done along these lines [158, 585f, 588]. More specifically, in the area of IIL there have been few attempts at developing a meaningful system of evaluation and control of ideological factors in relation to ISA's decisions and underlying policies (e.g. [153]). In line with the failure to address the collective law-making power of the ISA community and its stark ideological traits as a structural source 54 Especially since the acknowledgement of the failure of the "original intent" jurisprudence [154,504] and the rest of interpretive methods proposed in Articles 31-33 of the 1969 Vienna Convention on the Law of Treaties to provide a basis for determinative legal interpretation [90, 188f]. 55 Although the term "epistemic communities" also tries to capture the same collective aspect of meaning creation in decision-making, it is seen by critics as an attempt at legitimizing the role of experts in the international governance of domestic affairs through the replacement of political debate with a reference to some objective non-political knowledge and technocratic (legal) discourses, [74]. Furthermore, being a notion that draws on the objectivizing discourse of the natural sciences, its applicability to international lawyering is far from uncontroversial even among its proponents who consider that lawyering lacks the required technical objectivity [56,3]. of illegitimacy, the most consequential ISA reform proposals do concentrate on the procedural defeasibility or revision of specific arbitration decisions understood as discrete and disconnected events. Such initiatives reach out to state elites and take little of the socio-political impact of the IIL/ISA project into account [167, 20f]. 56 Despite the pleas to become more acceptable and persuasive for larger audiences [126,425], reform proposals fail to revise the economic-political rationality upon which the professional persuasiveness standards of ISA are based, not only when they advocate for the "internal reform" of arbitration doctrines by the ISA community itself [66,71,81,87,102,104,107,108], but also when the goal is the establishment of formal appeal mechanisms with permanent or ad hoc revision tribunals [5,44]. 57 This comes hardly as a surprise as the collective sharing of basic interests and understandings mentioned above is not simply a condition for membership to the ISA community; it is also a condition for participation therein and cannot be abandoned by individual investment arbitrators at will whatever their personal views. As deep-rooted, unstated practical and theoretical assumptions or "frames" create an entrenched sense that legal arguments are non-political, they prevent political assumptions and value rankings from surfacing and being openly debated for what they are, i.e. contingent images of a global form of life. As long as the rationality standards by which reexamination takes place are the uncritical product of unstated interests and views on politics, ethics and the society; as long as they show no clear awareness of the ideological nature and background of their activity and give no adequate room for genuinely open and broadly representative debate about its politics, the proposed mechanisms of defeasibility seem utterly circular. As the debates at UNCITRAL WGIII confirm, even if ISA reform might help overturn some decisions in particular cases, piecemeal revisions cannot substantially challenge the ideological framework on which the asymmetric power of ISA is predicated and deployed as an instrument of private global governance at the service of financial globalization. 58 Similarly, widespread suggestions to expand the basis of applicable law in ISA to include human rights law are, under these circumstances, likely to prove sterile in terms of adding political diversity to ISA for a neoliberal discourse 56 The problems of equating the interests of postcolonial states with those of their populations have been long established, e.g. [103, 347f, 352]. This becomes critical when complex constellations of local interests are reduced to the simplistic representation of the state-such simplification is in itself an ideological move [25,74]. Against the use of the dichotomy state vs investor in the analysis of ISA, cf. [168,238]. 57 Cf. e.g. UNCITRAL Working-Group III proposals and discussions on Tribunals, ad hoc and standing multilateral mechanism, available at https ://uncit ral.un.org/en/worki ng_group s/3/inves tor-state . Accessed 21 Oct 2020. 58 In this sense, UNCITRAL Working-Group III clearly identifies the improvement of the confidence of investors and the enhancement of international capital flows as "higher policy goals" in IIL/ISA reform, cf. Report of Working Group III (Investor-State Dispute Settlement Reform) on the work of its thirtyfifth session (New York, 23-27 April 2018 = , A/CN.9/935, para. 37. on human rights as the product of global free market competition and efficiency is readily available to the arbitration community [75, 146f, 158ff, 79, 308f]. 59 Admittedly, there are aspects of the critical approach that can partially explain the neglect of the ideological dimension of ISA and the reluctance of legal theorists and practitioners to touch upon this complex issue. These aspects include the difficulty of identifying a workable notion of ideology itself [64, 12f, 79, 286ff, 294] and the doubts about how legal practice should integrate the critique into the rule of law ideal without losing professional identity [95,252]. However, there are contributions that point at interesting possibilities. In a 2001 piece, Susan Marks proposes to recover the critique of ideology for international legal scholarship and defines it as the "analysis of the involvement of systems of meaning with relations of power" [93,117,94]. For Marks, ideology critique should be understood neither as a neutral categorization of different political traditions, nor as a matter of merely exposing the mistaken epistemological status of certain beliefs. 60 Rather, this model of critique targets the ways in which legal discourses are deployed, not just because they are erroneous, but because of their function and ethical/political effects, i.e. the legitimation of power asymmetries that are "instrumental to injustice" [93, 111f, 115].
In the critique propounded by Marks, ideology is not conceived of as a monolith to be studied with the arrogance of an external observer. On the contrary, ideology exists in her view as a feedback loop between epistemological mistakes and the practices in which we all participate, not so much owing to unawareness of the mistaken nature of the assumptions that ground our practices, but due to inattention to how our "acting as if" actually shapes social reality [93,113]. 61 Accordingly, the "problem-solving" type of legal work, likely the most widespread among legal professionals, that "seeks to isolate problems and propose remedial action, on the footing of a framework of ideas and practices which is not itself in question" is also an ideological strategy that intended or unintendedly "helps to obscure and legitimate relations of domination" [93, 118f].
Therefore, the challenge is to a large extent methodological. The main obstacle to be overcome is not so much ideology itself, which seems inescapable for both internal and external participants in legal debate [54,180], but its denial and concealment behind necessitarian claims to depoliticization. The preliminary methodological step then should be to create awareness about and describe the role played by such collective understandings in IIL reform and ISA practice. This includes the definition of the rule of law itself, e.g. when it is defined by focusing exclusively on state power as a threat to narrow notions of liberty ignoring global private power as a threat to material visions of liberty [49, 184ff, 147, 4]. 59 For instance, the appeal to "human rights due diligence" in investment as formulated in the UN Guiding Principles on Business and Human Rights simply refers forth to another process without external participation, verification, monitoring or review led by corporate managers, cf. [59]. For a take on the limitations and ultimate reliance of "human rights due diligence" on ethical/political factors for its implementation, cf. [41,162]. 60 As implied in the most superficial level of the traditional critique of ideology [51, 13ff]. 61 E.g. "acting as if labour relations were based on free exchange among equals".
In the light of this, also the proposal that the rule of law must yield ideologically balanced assessments [91, 171ff] can be regarded as a call for maintaining a level of domination and injustice. However, for practical reasons, the goal of ideologically balanced assessments seems a constructive point of departure in the debate as a manner to challenge and possibly decrease the asymmetric power of global corporate finance legitimized by ISA. For that purpose, if the promise of an international rule of law that produces ideologically balanced assessments is to be fulfilled, ideology must be first taken into account. The challenge of critical indeterminacy must first be addressed and the role of the dominant ideology of ISA considered in relation to its massive social, political and environmental impacts.
In this regard, it seems particularly important to explore the integration of alternative methods of legal scholarship into mainstream doctrinal work from legal education to legal practice. Even though it is beyond the scope of this work to produce any specific prescriptions as to how to proceed to such integration, it is crucial to point at that which must be avoided, more specifically, the inattentive application of doctrinal approaches that, operating as a professional reflex, uncritically perpetuate the use of a legal language already permeated by the assumptions and goals of neoliberalization. If legitimacy, understood as persuasion of the majority of the addressees of law, is expected to play a role in the grounding of international investment law and not be replaced by authoritarian imposition [21], ISA should be rethought and its practice reshaped as a forum for "ideological dialogue and evolution" [79,70] that includes the genuine voices and the language of the populations affected, rather than practiced as a place to reinforce unpopular neoliberal policies in the name of the international rule of law ideal (cf. e.g. [119, 167, 21ff]). The work, therefore, should begin by raising awareness about the ideological dimension of IIL and rethinking the traditional doctrinal methods within ISA-and the legal profession and education more generally.