1. Introduction
When discussing the relationship between economics and religion, one immediately encounters the strong assertion, made by a few contemporary scholars in economic theory, that economics is a positive science and is free of any prejudice, let alone moral or religious assumption (
Shachar and Zame 2008)
1. This standpoint might be viewed as the expression of some epistemological
naïveté and has indeed been challenged (cf. e.g.,
Atkinson (
2009) among many others). In
Giraud (
2021), in particular, I provided a formal argument suggesting that consumption choices can be viewed as the consequences of moral axioms regarding the distribution of status and resources in a given economy. This discussion, however, remains framed in a context where it is taken for granted that economics and religion have their own, autonomous spheres of intelligibility—and that these spheres may possibly have a non-empty intersection, whose extension and meaning remains to be assessed. This is also more or less the main presupposition of this special issue, as I understand it.
There is, however, at least one important contemporary writer whose take goes much further than the frame just alluded to: the Venetian philosopher, Giorgio Agamben. Indeed, his opus magnum,
Homo Sacer (in particular,
Agamben (
1998,
2011)), claims to provide the Christian theological anticipation of the current understanding of mainstream economics as a domain where the pursuit of individual interest spontaneously leads to the common good. Conversely,
Homo Sacer offers an interpretation of Christianity as being intrinsically οἰκονομία (
oikonomia) (more on this later). The main argument is that the modern rupture between “sovereignty” and “government”—which lies at the heart of his political diagnosis of our contemporary situation—can be traced back to classical Trinitarian theology. Since this rupture is allegedly responsible for today’s Western understanding of economics, this implies that, according to the Italian philosopher, our current crisis has Christian theological roots. Following this line of thought, therefore, leads to the conclusion that there is no such thing as a frontier or a common boundary between economy and Christian theology; insofar as we accept Agamben’s take, economics
is (similar to) Christian theology and vice versa.
Agamben’s contribution is viewed by many as decisive both in the philosophy of contemporaneous art and in political philosophy. To the point that some scholars consider him as a “major political philosopher of our time” (
Segré 2017) and his work belongs to the recommended readings of a large number of academic curricula in anthropology, political philosophy and aesthetics—especially in the US. Curiously, on the other hand, with a few exceptions, Agamben has not receive much attention from theologians and is largely ignored in economics. This is all the more surprising since
Homo Sacer exhibits quite an erudite and fine knowledge of the patristic tradition. Given the very small number of non-theologians who are familiar with the writings of the Greek and Latin Fathers of the Church, Agamben’s erudition alone should have aroused curiosity. One of the purposes of this article is to start filling this gap by discussing Agamben’s main claim that economics
is Christian theology and vice versa.
His publications can be viewed as part of the literature initiated some twenty years ago in the English language, and whose main contributors include
Nelson (
2001),
Goodchild (
2003) and
Taylor (
2007). All of them argue that the idea—usually attributed to Mandeville and Smith
2—according to which the encounter of aggregate supply and demand on a “free market” should lead to an allocation of resources that satisfies some criterion comparable to the Common Good, owes some debt to Christian traditions. However, they all offer perspectives on the issue that sharply contrast with Agamben’s standpoint. Nelson pictures current professional economists as “priests” of the “modern religion”, namely “economic progress”:
“The most vital religion of the modern age has been economic progress. If economists have had a modest impact in actually generating this progress, or even understanding the actual mechanisms by which it has occurred, they have had a large role in giving it social legitimacy. They have been the modern priesthood of the religion of progress, interpreting its forms, refining its messages, and assuring the faithful that progress would continue. Without the blessings of an authoritative priesthood, all kinds of opportunistic and predatory forces are always lurking in wait in society, holding the potential to undermine the workings of the market as well as other core institutions. By promoting a culture of civic commitment to the market system, economists have put the power of religion to work in fending off these newer temptations of a modern kind of ‘devil’.”
To the best of my knowledge, however, nowhere does Nelson claim that Jewish and Christian traditions were intrinsically inclined to anticipate mainstream economics
3. By contrast, according to
Goodchild’s (
2003) critique of capitalism in view of the looming ecological disaster, modern European citizens never ceased to be religious (pious) despite their rejection of the Ancien-Régime’s religious heteronomy:
“Modern reason was founded on a critique of piety: for it was through complicity in shared beliefs that people were subjected to hierarchical domination by powers and authorities. Denouncing the pieties of tradition, daring to speak of what is different or new, modern reason does not turn attention to its own determinate practices of directing attention. It disavows its own piety, and this very disavowal constitutes its piety.”
There is an alleged implicit religious structure underpinning both pre-modern Christianity and contemporary capitalism but, again, Goodchild does not dig into Christian traditions with the aim of showing that they might have morphed into today’s cult of the marketplace. Finally, with
Taylor (
2007), a central piece of Christian history—Reform—is attributed a major role in the secularization (
Entzauberung) process that would lead to modernity and to today’s economics:
“Briefly summed up, Reform demanded that everyone be a real, 100 percent Christian. Reform not only disenchants, but disciplines and re-orders life and society. Along with civility, this makes for a notion of moral order which gives a new sense to Christianity, and the demands of the faith. This collapses the distance of faith from Christendom. It induces an anthropocentric shift, and hence a break-out from the monopoly of Christian faith.”
The main difference between what Taylor calls his “Reform Master Narrative” (RMN) and Agamben’s narrative is that, as we shall see, the latter goes back much further in the Christian traditions to identify the origin of what he sees as today’s predicament, namely the theological quarrels of the second century. Consequently, it is not just Reform that is viewed as a breeding ground to modern economics but Christianity as such.
The rest of this paper discusses Agamben’s own “Master narrative”.
Section 2 briefly recalls how
Agamben (
1998) understands “bare life” as being the main constituent of a sovereignty that is devoid of any transcendent foundation.
Section 3 explains how, within such an understanding of sovereignty, Agamben credits the Trinitarian theology of the second century Church Fathers with inventing the paradoxical ontology upon which the mascarade of our modern democracies operates, leading to the absolutization of the “invisible hand” as a universal “providential machine”. The last two sections question Agamben’s main thesis from two different viewpoints.
Section 4 recalls that contemporary mainstream economics has long since mourned the invisible hand insofar as it has recognized since the 1980s the profound inefficiency of “markets”. The last section challenges Agamben’s rendition of the role played by Christianity by arguing that his narrative may do justice only to one trend of Christian traditions—not the entirety of them.
Before plunging into the matter, a caveat is in order: there is no point in claiming to be able to capture the depth and finesse of the entire trilogy of Homo Sacer within a few pages. The following is therefore, by necessity, a cavalier introduction to some of the themes addressed in this monumental work. Being myself trained in mainstream economics and Catholic theology, I can hardly claim to be an expert on Agamben’s thought, never mind of his numerous sources. I hope, however, that the transversal approach taken in the following may feed the discussion around one key aspect of the relationship between economics and theology.
2. Agamben and Bare Life
Already the subtitle of his
magnum opus,
Homo Sacer—Sovereign Power and Bare Life, indicates that
Agamben’s (
1998) intention is to revisit the question of the relationship between life and power, albeit from a very different perspective than the Foucauldian one from which he takes inspiration.
4 This revival leads him to take Christianity to court in a way that is foreign to Foucault’s work. His ambition is to retrace the genealogy of power as Westerners have experienced it for at least two millennia. The latter is essentially characterized by what Agamben dubs “spectacular power” (e.g.,
Agamben 1998, p. 256) and which, according to him, lies at the heart of “government by consent” or “consensus democracy” (ibid.). These concepts tie together the contemporary omnipotence of the economic instance, the omnipresent media spectacle
5 and the necessity, in our contemporary democratic regimes, of appealing to the consensus of opinion—or to what takes the place of it (polls, plebiscites, referenda, etc.)—to ensure the legitimacy of a state power that, in Agamben’s eyes, less and less effectively conceals the fact that it is intrinsically arbitrary.
According to Agamben, the original structure of sovereign power implies a specific relation to life, known as the relation of “exception”. Sovereignty does not relate to subjects equipped with rights, but to a “bare life”, which it it produces at the frontier of law. The life of each and every one of us would thus be exposed to killing violence of sovereign power, insofar as I could at any moment be relegated to the sphere of a life absolutely deprived of all rights, the “bare life”. At first glance, it may seem as if we’re returning to a “classical” conception of sovereignty, the very one Foucault sought to free himself from, but this is only partly true. Agamben’s project consists in the restoration of a Schmittian understanding to sovereignty within a diagnosis that extends to the whole of the Western history of sovereignty. Each of our lives is subject to an arbitrary decision that determines its status: some are entitled to certain rights, others are not, and the distribution of these rights is arbitrary in the sense that it cannot be justified by natural law or the essence of sovereignty. In other words, the essence of sovereignty is precisely its arbitrariness. Taken within this logic of “exception”, “life” (
vita) would feed the functioning of sovereign power, which would institute and maintain itself by producing the “biopolitical body” over which it is exercised. As
Genel (
2004) has clearly seen, whereas Foucault based his analyses on a philosophical theme that echoes, of course, the Heideggerian understanding of Dasein as “an animal in whose politics his life as a living being is in question”, Agamben intends to reverse the formula: “We are, he writes, citizens in whose natural bodies our very political being is at stake.”
6 In other words,
Homo Sacer is not content with thinking about specific, historically-determined techniques of power, as Foucault did, but the very essence of sovereignty from its very origins, proposing to decipher it as an intrinsic relationship to our “natural bodies”.
In Agamben’s eyes, entry into the political sphere takes place through an exclusion of mere “natural” life, or ζωή, which remains circumscribed to the domestic sphere of the home (οἶκος). The destination of mankind, and in particular of the community in Aristotle, is not the mere fact of living but the politically qualified life, the βίος.
7 According to Agamben, the ζωή—which becomes the stake of the specific political techniques that Foucault called bio-power—is in fact at the foundation of the political sphere from its very origin under the species of
vita nuda (“bare life”) and according to the particular modality of exception. It is therefore
because life is originally at the foundation of the political sphere that bio-political techniques, in the Foucauldian sense, have been able to bear on it for two centuries. The ζωή is excluded from the political sphere, which is constituted by this very eviction or by its transformation into βίος, according to an arbitrary partition of people. Such an operation of “politicizing” life—which founds the political sphere—is viewed as being equivalent to the constitution of a bare life, i.e., a life maintained under the power of sovereign power by the very gesture that excludes it from the city. The practice of “banning” would express this power:
vita nuda is that which is banished in the double sense of that which is excluded from the community, banished, but which is in this way placed under the sign of the sovereign, under his banner.
Agamben concludes that bare life is not a given, and certainly not “natural” in the traditional meaning of opposition between nature and culture. It is but the “original provision” of sovereign power:
“Life in the sovereign ban is sacred from the outset, that is, exposed to murder and insacrifiable. The production of naked life becomes, in this sense, the original benefit of sovereignty. The sanctity of life, which we are trying to assert today as a fundamental human right against sovereign power, expresses, on the contrary, the original subjection of life to a power of death, its irremediable exposure in the relation of abandonment”
What is at stake is a definition of the sacred borrowed from
homo sacer, an astonishing figure of archaic Roman law who could be killed without committing homicide, but who could not be sacrificed in ritual form: a life devoted with impunity to an arbitrary death. Such figures of the “bare life” haunt our history: the Roman
homo sacer, but also the Greek exile, the
mis-au-ban (
ban-dit) of the Middle Ages, of which the werewolf would be a legendary remnant (ibid., pp. 86, 140), as well as the political refugee of the 20th century, the Auschwitz deportee, the Guantánamo Bay detainee, etc. Agamben is then led to a hyperbolic denunciation of all sovereignty, on the grounds that it can only draw “force of law” from an exclusion from life, possibly skillfully concealed but betrayed by all those victims of the arbitrariness of a state of exception who populate our history.
3. Trinity and Ontological Dualism
In the eyes of the Venetian philosopher, the state of exception constitutes an empty space of law essential to the juridical order, through which the latter assures itself of a kind of performativity of law
prior to the law itself. The proposed philosophical trajectory is thus oriented towards thinking of the political as the production of a void, qualified by the exception of bare life, destined to be the foundation of all sovereignty. The purpose of
Agamben (
2011), which interests us here, is then to locate this “void”, as it were, between a “
macchina governamentale” (governmental machine) on the one hand, conceived on an economic-managerial model, and the “
gloria” (glory) with which political power surrounds itself to perpetuate the religious trust placed in it by its subjects. This thesis constitutes, in my view, the central core of Agamben’s theological take on the relationship between theology and economy. It says that the δόξα with which the Western state surrounds itself is a vain attempt to find a transcendent foundation for its authority—to give “force of law” to the law it enacts—whose emergence owes debts to the lineaments of a Christian genealogy.
8It is not possible, within the limits of the present article, to discuss in detail Agamben’s long and erudite demonstration, which goes back to the Pauline writings and then navigates notably between the works of Clement of Alexandria, Irenaeus, Tertullian and the Cappadocians in order to suggest, finally, that the Christian patristic tradition bears the essential responsibility for a dichotomy between regnum (reign) and gubernatio (governance) that would be at the origin of our contemporary crises. Let us therefore try to focus on the essentials.
The rise of the “economic paradigm” that now, according to Agamben, pervades almost the entire social sphere of Western societies has its distant origins in a confusion between the city and the home, a misunderstanding propagated by early Christian literature. On the one hand, the πόλις, the properly political space, on the other, the οἶκός, the home, the
den, and, ultimately, the terrain of the οἰκονομία. The distinction between these two registers, though established by Aristotle, would indeed have disappeared from Late Antiquity through several stages that the book patiently traces. Trinitarian dogma bears most of the responsibility for such an “oversight”, which seems to play a role analogous to the Heideggerian oblivion of being that is characteristic of Western ontotheology. Christian Trinitarian monotheism would in fact determine the development of a political model, the formula of which, over a millennium later, could be summed up as: “
Deus regnat sed non gubernat” (God reigns but does not rule).
9 Divine power can only be exercised by delegation, without being divided. To achieve this, Christianity is said to have split the Platonic being in two: on the one hand, being as presence which finds in the one God the transcendence of sovereign power and, on the other, being as action “which substitutes for this the idea of οἰκονομία understood as an immanent, domestic order of human life.
This split can be interpreted, from within the continental European philosophical tradition, as corresponding, for the first type, to the metaphysics of the determination of being as presence, as thematized and criticized by Martin Heidegger and Jacques Derrida as being the hallmark of Western ontotheology; the second type of ontology corresponds, for its part, to the identification of being and action (or will) found, e.g., in Friedrich Nietzsche
10 or Arthur Schopenhauer. In Agamben’s view, this dichotomy corresponds to the duality that opposes classical political philosophy, centered around the transcendent concept of sovereignty, and political economy as the immanent, domestic government of society, of which Foucauldian biopolitics is the explicit analysis. The reduction, or rather the absorption, of the first by the second—hence, the disappearance of the Aristotelian distinction between city and home—would be one consequence of the precedence that would then soon be given to action, that is, to immanent and domestic government, over a transcendent being which does not rule and becomes “useless”.
According to the Venetian philosopher, the theological origin of this duality can be traced back to the Trinitarian debates of Tertullian and the tendency of the second-century Church Fathers to think of a God who is both one and triune.
11 To resolve the paradox, unity would be placed on the side of being as presence, the Trinitarian character on the side of “economic” action in salvation history. But what would then have made it possible to safeguard the theological articulation between unity and triplicity would have been conquered at the cost of another split in the ontological order, the eminently problematic character of which would have escaped the vigilance of early Church Fathers, but which was to prove decisive for what followed: the distinction between being and action. Moingt’s translation of Tertullian’s
unicus deus cum sua oikonomia: “God with his government”, in the sense that “government” designates the king’s ministers, whose power is an emanation of royal power and is not comparable to it, but necessary to its exercise, so that “Economy signifies the mode` of administration by many of divine power” (
Moingt 1966, p. 923, the translation is my own).
Following Agamben, this dichotomy would enable Christian theology to construct its “dominant governmental paradigm” by attributing presence to the kingdom and action to government. This dual political ontology would have been made acceptable thanks to the concept of “hierarchy” introduced by
Pseudo-Denys the Areopagite (
1958). This would have enabled Areopagytus to sacralize ecclesiastical administration and, above all, to give a structure to the Christian governing machine capable of surviving the disarticulation of reign and government; even when it has become useless, reign would then be able to maintain itself by giving itself a new form: the glory (δόξα). Agamben can then formulate the thesis that guides the last three chapters of
Agamben (
2011): glory, which goes hand in hand with all hierocracy, is intended to conceal the fundamental arbitrariness of sovereignty, that is, the idleness of the reign, whilst all political activity is henceforth surrendered to governmental management alone. It is this reduction of politics to management by government that Christianity would have made possible by promoting the concept of οἰκονομία.
Agamben bases his proposal on the ceremonial history of power and law by
Peterson (
1935) and
Schmitt (
1970). As we know, Roman acclamations had a legal dimension of assent by the people. The right of triumph granted to the emperor was the legal core that informed the entire Roman law of imperial sovereignty. It is cult, ecclesiastical liturgy and profane protocol which lies at the core of contemporary democracies: “Contemporary democracy is a democracy integrally founded on glory, that is, the effectiveness of acclamation multiplied and disseminated by the media beyond all imagination” (
Agamben 2011, pp. 279–80). Such a function still exists in contemporary democracies, where
acclamatio would take the form of public opinion. While the government, embodied by the ecclesial hierarchy, manages the economy as an extension of the Son’s action, its power takes on the aspect of an inactive reign, attributed to the authority of the Father, who “produces” or delivers nothing but emptiness. The glory is but the splendor emanating from this emptiness, which both veils and reveals the central “
vacuità della macchina governamentale” (emptiness of the governmental machine). A “providential machine” would then emerge from the disjunction of being and praxis. On the side of the Father, being does not act in the world; action, on the side of the Son and his Spirit, legitimized by the Father’s
sovranità (sovereignty), governs the world like a machine carrying out the Father’s orders.
In other words, Christian Trinity would thus have anticipated the “macchina provvidenziale” (providential machine) that separates and articulates powers: those of
- –
the Father (Deus otiosus), who reigns but whose being is summed up in a useless presence concealed by the fires of glory,
- –
of the Son, to whom “economic” action falls,
- –
and of the Holy Spirit, whose task it is to bring about the glory of the Father, so that the whole dogmatic artifice becomes credible.
The Son (Deus actuosus), insofar as he is distinct from the Father, would be his earthly “sword arm”, fulfilling through his incarnation the teleological, governmental, immanent, managerial and, ultimately, administrative program of the world. Finally, the Holy Spirit would unite the first two persons of the Trinity through doxology. In short, contemporary market democracies are artificial lies where the democratic will only serves as an acclamatio of the void glory of the State, whereas the bureaucratic administration does to job of secretly managing our society. In Agamben’s eyes, we owe this predicament to second-century Christian Trinitarian monotheism. It is, in fact, the multiple semantic shifts internal to the patristics around the concept of οἰκονομία that have enabled the contemporary economy to acquire the almost integral domination that is its own. Faced with a Father who was present but transcendent and idle, it was necessary to give a divine meaning to the immanent exercise of government, of action; this was the role played by the οἰκονομία of the Fathers.
According to Agamben, the science of publicity is but the contemporary avatar of “Glory”, i.e., the democratic assent obtained through an opinion-forming mass. Finally, the Father “who reigns, but does not govern” already prefigures Adam Smith’s “invisible hand”, according to a providential disposition that owes its essence to the patristics (
Agamben 2011, pp. 122, 227, 283–85).
Christianity would thus have been compelled by its Trinitarian logic to think of history in terms of a “mysterious economy”. Indeed, in proclaiming the reign of God at work in the history that separates us from the Parousia, Christians had to constitute a historical paradigm different from pagan fatum, as well as from Stoic necessity. The οἰκονομία thus left an a priori less narrow margin for free human practice. But the articulation of this relative freedom with the regnum of the Father now constituted in itself a theological–political mystery, inducing an insurmountable division between the transcendence of power—being as mere presence—and an immanent economic teleology—being as action. The combination of faith in the “invisible hand” of the marketplace managed by bureaucratic administrations (be they private or public) and “media glory” would be the contemporary problematic answer given to this aporia.
Of course, there is something exorbitant about this fresco, which brings together historical realities spanning more than a millennium. Agamben himself is cautious: in his methodological essay,
The Signature of All Things, he insists that his genealogy of our modern situation does not claim to identify a causal origin in the Church Fathers’ Trinitarian theology. Trinitarian economy is rather a “paradigm”, “whose aim was to make intelligible series of phenomena whose kinship had eluded or could elude the historian’s gaze.” (
Agamben 2008, p. 31) What is, then, the status of this “kinship”? “When you press on this claim”, comments Charles M.
Stang (
2020); however, the book does not offer a very precise or satisfying account of either intelligibility or kinship, leaving the impression that the “paradigm” of Trinitarian
oikonomia operates on the level of a grand analogy. The modern political structure of kingdom divorced from government, with only glory serving as the glue, is somehow
like Trinitarian
oikonomia. But the “somehow” remains frustratingly opaque. It is this “grand analogy”, however imprecise it might be, that I will discuss in what follows.
4. Mainstream Economics and the Invisible Hand
In the next two sections, I would like to question certain aspects of this impressive grand narrative which encompasses not only Reform and Weber (as with
Taylor (
2007)) but also Christian patristic tradition and Scottish Enlightenment. For the sake of brevity, I will focus only on two features. The first one deals with the implicit assumption that the whole economy today boils down to market fundamentalism based on the invisible hand. If this is not true, as I will show (even if we restrict ourselves to mainstream economics), this means that the predicament induced by the Christian genealogy identified by Agamben concerns only one sector of the economy: the one which remains faithful to the myth of the invisible hand, despite its refutation by mainstream economics. That a portion of commentators still adheres to the legend of market efficiency is an interesting paradox that I shall not try to explain here, nor does Agamben. It implies that Agamben’s critique is
not entirely wrong: segments of our societies do live on the premises of this urban legend. But my point is to stress that it addresses only
one aspect of today’s economy, namely a certain market fundamentalism which lacks any scientific background. The next section will aim at performing the same kind of critique but, this time, within the theological domain of Christian traditions.
As Jonathan Shefler puts it: “One of the best-kept secrets in economics is that there is no case for the invisible hand. After more than a century trying to prove the opposite, economic theorists investigating the matter finally concluded in the 1970s that there is no reason to believe markets are led, as if by an invisible hand, to an optimal equilibrium—or any equilibrium at all. But the message never got through to their supposedly practical colleagues who so eagerly push advice about almost anything. Most never even heard what the theorists said, or else resolutely ignored it.” (
Shefler 2012)
As surprising as this statement might seem, it is correct. General Equilibrium Theory (GET) can be considered as the core of standard economic theory. It underpins virtually all areas of mainstream economics and finance as we have understood and taught them since the Second World War. Beyond the possible aridity of its mathematical results, at the heart of this theory lies the highly controversial debate surrounding the invisible hand of the market. As I will now show in what follows, GET teaches us that decentralized markets are deeply inefficient and may not even lead to any balance between supply and demand. Before going into this, let us briefly remember what exactly can be credited to Smith. Again, following
Shefler (
2012):
“Adam Smith suggested the invisible hand in an otherwise obscure passage in his Inquiry Into the Nature and Causes of the Wealth of Nations (1776). He mentioned it only once in the book, while he repeatedly noted situations where “natural liberty” does not work. Let banks charge much more than 5% interest, and they will lend to “prodigals and projectors,” precipitating bubbles and crashes. Let “people of the same trade” meet, and their conversation turns to “some contrivance to raise prices.” Let market competition continue to drive the division of labor, and it produces workers as “stupid and ignorant as it is possible for a human creature to become.”
It may, therefore, not really come as a surprise if GET actually amply confirms this statement. In 1954,
Arrow and Debreu (
1954) provided what has been since then considered as the canonical model of mainstream economics. The contention of the authors is that, under certain assumptions, this model predicts that every decentralized market economy should exhibit equilibrium prices that will simultaneously clear all markets and lead to an “optimal” allocation of resources. This is exemplified in
Figure 1, which is well-known to all students who have participated in at least one semester of micro-economic theory:
Here, one considers a hypothetical economy populated by two consumers who trade two commodities. Each point in the rectangle (the so-called Edgeworth box) epitomizes a distribution of each good to households whose preferences are captured by the (red) indifference curves. The “Pareto curve” refers to the set of allocations which are “optimal” in the sense of Vilfredo Pareto, i.e., such that it is not possible to reallocate the two goods in such a way that both agents are weakly better off and none of them is worse off. In the setting of consumer preferences that can be represented by differentiable utility functions, this amounts to requiring that the gradient of each player’s utility be collinear to the price vector, p. The x point represents one allocation of goods which is such that every consumer would agree with it given the prevailing price vector, p, and their initial allocation—it is usually called a “Walrasian equilibrium” in tribute to Léon Walras, who is perhaps the first engineer who tried to prove that such an equilibrium exists. The “miracle” of the “invisible hand” is that this x point lies precisely on the Pareto curve. In other words, it is Pareto-optimal. The quest of individual interest leads therefore to a mutually beneficial agreement (often identified with the Common Good).
That every Walrasian equilibrium is Pareto-optimal is the modern transcription of the legendary interpretation of Smith’s “invisible hand”. Since the 1980’s, however, it is has been clearly demonstrated, within GET, that, in reality, Walrasian equilibria are
almost never Pareto-optimal; when they are, it is only by accident. A first demonstration of this has been given by
Geanakoplos and Polemarchakis (
1986): as soon as markets are incomplete, Walrasian equilibria almost always fail to be optimal.
12 What does the “incompleteness” of markets mean? It implies that there is at least one type of risk and one market participant who has no way to insure herself against that risk. By contrast, complete markets would be such that, for every type of conceivable risk (climate warming, populist victory in the next US elections, etc.) there are financial hedging instruments available to all that enable each of us to protect ourselves against the consequences of that risk. Obviously, markets are always incomplete. Consequently, GET had already proven in the 1980’s that the “invisible hand” is invisible because it does not exist.
Needless to say, this was not the end of the discussion. One might indeed acknowledge that markets are incomplete but argue that financial innovation helps reduce that incompleteness. Banks create new financial hedging instruments every day: weather derivatives are a simple illustration of this as these assets, which were introduced in the 1990s’, enable their owner to protect themselves from losses possibly induced by weather catastrophes. Credit derivatives are another famous example of such financial innovation. Does this mean that, though it is currently out of reach, Pareto-optimality of Walrasian equilibria should be considered as, say, the teleological horizon of our market economies? The answer provided by GET is quite clear, and it is negative, as has been proven by
Elul (
1995); unless it is the ultimate financial asset which suffices in completing markets, the additional asset may worsen the Pareto-efficiency of markets! There is no guarantee of “historical progress” in terms of market Pareto-efficiency, and the example of subprime credit derivatives, which were at the heart of the Global Financial Crisis of 2008, amply illustrates the fact that certain financial innovations can have even more catastrophic consequences than the risks against which they were intended to hedge. Some years later, an even worse result was found by
Momi (
2001): once the constraints induced by incomplete markets on production are taken into account, Walrasian equilibria may even fail to exist.
13There are many other negative results surrounding the alleged invisible hand. For instance, equilibria (if they exist) may not be stable for any type of out-of-equilibrium dynamics; they may also fail to be Pareto-optimal as soon as production exhibits increasing returns to scale or if some kind of externality (such as climate change) is not internalized by markets, etc. So much so that the general conclusion from GET is rather as follows: the inability of markets to lead to efficient equilibria (if any) is the rule rather than the exception.