Keywords
deterrence
compliance
international criminal justice
international humanitarian law
prevention
This article contends that international criminal justice provides minimal general deterrence of future violations of international humanitarian law (IHL). Arguments that international courts and tribunals deter future violations – and that such deterrence is a primary objective – assume an internally inconsistent burden that the processes cannot bear, in essence setting international criminal justice up for failure. Moreover, the inherently limited number of proceedings, the length of time required, the dense opinions generated, the relatively light sentencesFootnote 2 and the robust confinement conditionsFootnote 3 all erode whatever limited general deterrence international criminal justice might otherwise provide. Bluntly stated, thousands of pages of multiple Tadić decisions have not factored into any service member's decision-making on whether to comply with IHL.
International criminal justice can play many roles,Footnote 4 including fostering compliance with IHL, but not through general deterrence and the threat of punishment. Adherence to IHL is an indirect byproduct of international criminal justice as a moral statement, an explication of how the international community views certain actions in armed conflict. This statement, often translated by military legal advisers and conveyed to service members by military leaders through personal example, briefings, training exercises, and military manuals and regulations, reinforces behavioural norms of how to conduct oneself in the most immoral of circumstances: armed conflict. International criminal justice's moral statement aids service members in navigating the moral abyss which results from a State lawfully ordering them to intentionally direct lethal force against fellow human beings.Footnote 5 The result is service members who, in the aftermath of armed conflict, can live with themselves and the decisions they made during armed conflict. In the process, and in part as an indirect result of international criminal justice, the arc of service members' behaviour tends towards complying with IHL.Footnote 6
This article first clarifies what is meant by “general deterrence” before reviewing how the claim that international criminal justice provides such deterrence is relatively new and stems from misunderstandings of what the International Criminal Court (ICC) can achieve. From there, the article explains how general deterrence is a challenging proposition for any criminal justice system and amounts to an unbearable burden at the international level. I then describe the indirect role that international criminal justice plays in providing if not moral clarity, then at a minimum, less moral ambiguity in defining by exception the bounds of permissible conduct during armed conflict.
General deterrence?
The focus of this article is on general deterrence, understood as the theory that criminally punishing an offender for violating the law dissuades others from similar violations. I recognize that some commentators, to varying degrees, reject general deterrence in the context of international criminal justice.Footnote 7 Others claim that what is problematic is not general deterrence per se, but attempting to “ascribe deterrent aims to (or judge deterrence in the context of) single international criminal courts or tribunals”.Footnote 8 I don't disagree. My point is that, as explained below, many influential figures began promoting international criminal justice's general deterrent effects twenty years ago. They have not only retrospectively discovered general deterrent effects, but also claim these effects are the primary goal of international criminal law. Since this reconceptualization occurred in the mid-1990s, commentators – and international courts – have attempted to fit the square peg of general deterrence into the round hole of international criminal justice.Footnote 9
Obviously, general deterrence is distinct from individual or specific deterrence – the theory that punishing an offender deters that particular offender from a future violation. Relatively speaking, the efficacy of a criminal justice system providing specific deterrence is easier to evaluate: it can be seen in the number of specific individuals who, having been punished for violating IHL, do or do not re-offend. Yet there is considerable debate on how well international criminal justice provides even specific deterrence.Footnote 10 That there is debate on the specific deterrence aspects of international criminal justice is (or should be) a harbinger of the system's inability to provide the more abstract general deterrence.Footnote 11 If opponents of international criminal justice were behind the claims that the system provides general deterrence, the argument would be viewed as a straw man. Yet the unbearable burden of deterrent effect derives not from critics of international criminal justice but, as discussed below, from supporters.
Establishing that criminal prosecutions, at any level, generally deter others from committing the same or similar offences is challenging. It requires proving a negative: that the prosecution of person X for violating IHL deterred Y and Z in the future from similar violations. When Y and Z are not violating IHL, there is debate over the negative causation – proving why Y and Z are not committing violations. Rarely will individuals acknowledge general deterrence.Footnote 12 And when Y and Z do violate IHL in a manner similar to X, it would seem to present more straightforward evidence of the lack of general deterrence. Despite these challenges, or perhaps because of them, the idea that international criminal justice provides meaningful general deterrence is a relatively recent phenomenon.
General deterrence and international criminal justice
Contemporary international criminal justice relies in large part on the International Military Tribunal (IMT) at Nuremburg following World War II. Yet the IMT's primary purpose was punitive – the “just and prompt trial and punishment of the major war criminals of the European Axis”.Footnote 13 The primary purpose of international criminal justice remained punitive up to and through the creation of the International Criminal Tribunals for the former Yugoslavia (ICTY) and Rwanda (ICTR). As one commentator notes, the UN Security Council resolutions establishing the ICTY and ICTR were focused on
incapacitating specific offenders by removing them from the field of combat and preventing them from maintaining political power … there is no clear language suggesting that the establishment of the ad hoc tribunals was intended to serve the purpose of preventing the commission of war crimes by potential offenders. General deterrence does not seem to have been a primary goal of the architects of the ad hoc tribunals. Footnote 14
Not until the “international epiphany”Footnote 15 of the 1998 Rome Statute did the international community formally embrace the idea that international criminal justice provided general deterrence. The Rome Statute itself reflects that the States Parties were “[d]etermined to put an end to impunity for the perpetrators of these crimes and thus to contribute to the prevention of such crimes”, as they “threaten the peace, security and the well-being of the world”.Footnote 16 Ending impunity for perpetrators is specific or individual deterrence, but preventing others from committing crimes in the future is general deterrence. Indeed, general deterrence is “the most important goal of the ICC”.Footnote 17 The former president of the ICC claimed that “[b]y putting potential perpetrators on notice that they may be tried before the Court, the ICC is intended to contribute to the deterrence of these crimes”.Footnote 18
While the States Parties adopted the Rome Statute in 1998, preparatory work began in 1995.Footnote 19 The idea that the ICC would generally deter the commission of atrocity crimes in the future “became a major selling point among advocates for the ICC's establishment and ratification”.Footnote 20 At the same time as the Preparatory Committee for the ICC was drafting early versions of what would become the Rome Statute, scholars began to reassess the ad hoc tribunals in terms of general deterrence despite that not having been a focus at their inception.Footnote 21 In 1996, Cherif Bassiouni outlined a view which was later adopted prospectively in terms of the ICC and retrospectively for the ad hoc tribunals. Bassiouni argued that “[t]he relevance of prosecution and other accountability measures to the pursuit of peace is that through their effective application they serve as deterrence, and thus prevent further victimization”.Footnote 22 General deterrence's migration from the ICC to the ad hoc tribunals continued and expanded such that by 2004, prosecutors from the ICC, the ICTY, the ICTR and the Special Court for Sierra Leone had issued a joint statement expressing their commitment to general deterrence in preventing future atrocities.Footnote 23
General deterrence as an unbearable burden for international criminal justice
While providing (and proving) general deterrence is a challenge for any criminal justice system, the challenge is much greater in the international context given the limited jurisdiction of the ICC and the ad hoc tribunals. These fora have limited mandates and resources, which understandably results in their only prosecuting some of the most serious offenders. Yet current research indicates that it is the certainty of punishment which is most likely to produce general deterrence.Footnote 24 By definition, international criminal justice cannot offer anything close to certainty of punishment.Footnote 25
Whatever vestige of general deterrence international criminal justice might claim dissipates along a spectrum of the inexorable time and length required. The greater the temporal gap between the offence and issuing the trial judgment, and the greater the length and opaqueness of that judgment, the less the deterrent effect. The case of Momcilo Perišić is, unfortunately, instructive on both points. Perišić allegedly violated IHL in 1995. The ICTY announced criminal charges against him in 2005. The ICTY then began the trial in 2008, yielding a trial judgment in 2011 requiring over 600 pages. In 2013, an appeals chamber granted Perišić's appeal, reversing the trial judgment and leaving the elements of aiding and abiding liability either in doubt or at least in confusion. Imagine a military legal adviser preparing to talk to senior military leaders and explain the “so what?” takeaway or lesson(s) learned from Perišić. What bright line, articulable rule or principle could the legal adviser say Perišić established or clarified? What actions does the Perišić judgment deter other senior leaders from taking?
I contend that military legal advisers would not even raise Perišić because they either (1) have not read the judgment, given its length and/or lack of clarity, (2) do not understand the judgment if they have read it (this barb is directed at the ICTY and not the military legal advisers), or (3) have read and understood the judgment but recognize that it cannot be meaningfully translated into anything resembling helpful legal advice. For the judgment to have even the potential of general deterrence, a military legal adviser would need to be able to finish the following sentence “Sir/Ma'am, in light of Perišić, you should avoid the following actions…”. That a military legal adviser cannot do so means the judgment cannot possibly deter others. It is fine to speak of law in terms of expressive value and signalling effects, but at some point, to be of practical utility, the law must be able to be clearly articulated, distilled and conveyed to the category of individuals that the international community seeks to influence.
Thus, despite all the time, effort and resources that it entailed, Perišić confuses more than clarifies the law, precluding even de minimus general deterrence. Most international criminal justice cases do play a role in fostering compliance with IHL, but it's neither accurate nor helpful to think of that role in general deterrence terms.
For international criminal justice to generally deter IHL violations, there would need to be exponentially more cases and more easily understandable judgments issued closer in time to the underlying IHL violations. And that is fully at odds with the nature of international criminal justice. The idea of general deterrence is even more problematic at the ICC, as increasing the number of cases at the international level is at cross purposes from what should be the primary measure of the Court's effectiveness – domestic criminal justice capacity-building – rendering the Court if not unnecessary then seldom used.Footnote 26
Arguing that international criminal justice provides general deterrence is akin to the tale of Sisyphus, who in Greek mythology was sentenced by the Gods to perpetually roll a boulder up a hill without ever being able to reach the top – only in this context it is worse, as proponents of general deterrence are seeking out the boulder.
International criminal justice as a moral touchstone
Yet regardless of how long the process takes and how convoluted the judgments may be, international criminal justice constitutes a moral statement – the international community's expectations of how belligerents are to conduct themselves during armed conflict. Ultimately this leads to greater IHL compliance, but not because of the unbelievably remote prospect of being in the dock at an international criminal proceeding. Rather, international criminal justice fosters compliance because it aids leaders in their efforts to protect service members' morality, their ability to live with the emotional consequences of knowing they have killed other human beings. IHL, along with the international criminal justice institutions interpreting it, provides a moral touchstone, the significance of which should not be understated – or miscast as deterrence.
As Telford Taylor reminds us, “[w]ar is not a license at all, but an obligation to kill for reasons of state”.Footnote 27 We know that “most soldiers have a phobia-like resistance to using force and need to be specifically trained to kill”.Footnote 28 Thus a significant part of military training does just that – it breaks down the natural human instinct against killing a fellow human being. Overcoming the instinct against killing is but one half of the challenge, however; doing so within the bounds of IHL is the other.
Conclusion
“War is, at its very core, the absence of order, and the absence of order leads very easily to the absence of morality…”Footnote 29 The absence of order is so profound that even delayed, long, and convoluted international criminal judgments are navigational lights, however dim, for service members traversing the moral abyss of armed conflict. The idea of international criminal law as a series of faint waypoints in a deep moral fog is distinct from its role (if it even has one) in providing general deterrence.
International criminal law in general deterrence terms essentially means that a soldier would avoid doing as, say, Tadić did because the punishment Tadić received had deterred the soldier. This simply doesn't happen.Footnote 30 Instead, international criminal justice is a tether, an anchor in the good sense, which helps military leaders develop and preserve the good order and discipline necessary to be an effective fighting force. There is an exceedingly remote chance that a service member will face international criminal justice for violating IHL, but there is a 100% chance that a service member will have to live with the consequences of what they do in armed conflict.Footnote 31
A US Army officer writing on his experience as a small-unit leader during the Vietnam war acknowledged that:
I had to do more than keep them alive. I had to preserve their human dignity. I was making them kill, forcing them to commit the most uncivilized of acts, but at the same time I had to keep them civilized. That was my duty as their leader. … War gives the appearance of condoning almost everything, but men must live with their actions for a long time afterward. A leader has to help them understand that there are lines they must not cross. He is their link to normalcy, to order, to humanity.Footnote 32
International criminal justice can help reinforce that link and, in so doing, indirectly fosters IHL compliance. It does so by disseminating societal norms by exception: from knowing how service members may not act, we indirectly reinforce how they should act in hostilities. This happens not necessarily because of the fear of a potential future international criminal prosecution that statistically speaking will almost never occur, but by helping to foster and maintain a moral sense of self with which the soldier can live, both during and in the years after armed conflict. However, we do international criminal justice a disservice by imposing the concept of general deterrence. International criminal justice cannot, and need not, bear the burden.
Keywords
deterrence
compliance
international criminal justice
international humanitarian law
prevention
crimes against humanity
genocide
war crimes
ICC
ad hoc tribunals
Deterrence as an aim of criminal law means discouraging future crime by effectively punishing crimes already committed. Since at least Cesare Beccaria, criminal policy generally has assumed that punishment – if certain and prompt – can deter the general public, as well as specific criminals, from committing crimes.Footnote 33 It is, however, probably still too early to definitively state how much this assumption holds true in the case of international criminal courts and tribunals. In fact, to evaluate such courts and tribunals per se as actors of general deterrence might miss the point, and result in misperceptions about their purposes and impacts.
Some context is important. Since the creation of the International Criminal Tribunal for the former Yugoslavia (ICTY) in 1993, the international community has witnessed the establishment of numerous international courts and tribunals, as well as internationally assisted domestic institutions, to deal with specific situations. These include, most famously, the International Criminal Tribunal for Rwanda (ICTR), the Special Court for Sierra Leone (SCSL), the Extraordinary Chambers in the Courts of Cambodia (ECCC), and the Special Tribunal for Lebanon (STL), as well as a number of other domestic and regional institutions such as the War Crimes Chamber in the State Court of Bosnia-Herzegovina, the Special Panels for War Crimes in East Timor, the Extraordinary African Chambers and the “specialist chambers” foreseen by Kosovo to deal with allegations of inhuman treatment of people and illicit trafficking in human organs in Kosovo.Footnote 34 The ICC, whose Statute is not universally ratified but nonetheless enjoys considerable support, is clearly meant to be the flagship institution of this international criminal justice “system”.
Over the past twenty years, as the discipline has rapidly yet tumultuously developed, the purposes of international criminal law, and the related question of its effectiveness, have been widely debated.Footnote 35 It is often argued that international criminal law does not actually assist in preventing criminal conduct (general deterrence), with the implication that its institutions should be, if not disbanded, at least more focused on achieving other more attainable or “realistic” goals.Footnote 36 This proposition is, to a certain extent, and maybe paradoxically, both true and misleading.
Attempts to ascribe deterrent aims to (or judge deterrence in the context of) single international criminal courts and tribunals may rest on a fundamental misunderstanding. Each institution exercises jurisdiction over only a handful of cases, and these cases – though often well-publicized – likely do not have enough “strength” on their own to effectively function as deterrents. The same is true, to a degree, for the existing international criminal justice “system”. Instead, one should look at each of the international criminal institutions as parts of a network of intertwined, mutually reinforcing agencies dedicated to protecting and strengthening the rule of law and pursuing individual criminal responsibility for gross IHL and human rights violations. In this sense, they can increase awareness of the primary rules for the protection of human dignity among the general public and, together with other institutions, foster compliance with the law and therefore, indirectly, general deterrence. I will develop these considerations along two separate, though interconnected, lines of thought.
A preliminary caveat: The law applied by international criminal courts and tribunals
Before discussing these lines of thought, it is useful to make a general remark. International criminal courts and tribunals are sometimes considered a sort of “branch” of the international community's efforts to enforce IHL.Footnote 37 To be sure, we cannot (yet?) speak about a comprehensive international judiciary, at least if understood as a complete and hierarchical judicial system covering the globe. Nonetheless, over the past twenty years or so, in large part because of the proliferation of criminal institutions supported by the international community, the general public has to a certain extent come to expect enforcement of the laws of war at the international level. This expectation is based on a degree of awareness about international courts and tribunals and what they do, as well as an understanding that the most egregious IHL violations should entail serious punishment. International criminal institutions are therefore increasingly assessed, in practice, against this expectation; their effectiveness in countering criminal conduct during armed conflicts is measured, in the minds of most, by the degree of adherence by international actors to IHL. But this expectation is, in a sense, too restrictive. Thinking of international criminal institutions in this way can actually result in an under-appreciation of their work and in the application of inappropriate metrics.
International criminal courts and tribunals unquestionably often deal with IHL violations, but their jurisdiction and practice is by no means limited to these. The ICTY, the ICTR and the ICC undoubtedly have jurisdiction over serious IHL violations (not just those amounting to grave breaches). However, they also try individuals accused of other international crimes, such as crimes against humanity and genocide,Footnote 38 which have often been neglected by domestic legislators and prosecutors. It would therefore be reductive to consider international criminal justice as merely an enforcement mechanism for IHL.
Indeed, overall, IHL violations and war crimes are often well-regulated in domestic systems: national authorities have quite often prosecuted individuals for serious IHL violations since the end of World War II; this is much less the case for crimes against humanity and genocide. When discussing the deterrent effect of international criminal courts and tribunals, therefore, it is necessary to look at the general scope of their jurisdiction, and not limit the analysis to IHL violations.
Conceptually, while it might be true that IHL violations stricto sensu are not deterred by international courts and tribunals, one must at least contemplate the possibility that the activity of these international institutions in relation to crimes against humanity and genocide – where the import of domestic prosecutions is much more limited – justifies the resources expended on them.Footnote 39 This nuance is important, as the ICTR, for instance, has carried out most of its judicial activities in the areas of crimes against humanity and genocide, leading the way for other institutions (domestic or otherwise) working in this field – a field that is much wider than the prosecution of violations of the laws of war narrowly defined.
General deterrence as an aim of international courts and tribunals?
The role of general deterrence in sentencing
International criminal courts and tribunals must therefore be assessed for their relevance in fields beyond IHL stricto sensu. The issue remains, however, whether their aim is, or should be, to contribute to general deterrence in the areas in which they exercise their jurisdiction.
First, it should be recognized that it is far too simplistic to compare deterrence in domestic systems with that in international criminal law without properly taking into account the stages of evolution of the respective systems. The application of criminal law in domestic jurisdictions has a rich historical pedigree, and societies have internalized the law's tenets. Domestic legal systems and general deterrence itself are to a certain extent predicated upon the monopoly on the use of force by States. It is in an environment of constant repetition and enforcement that the deterrent value of criminal law in domestic systems has reached the point it is at today. The situation at the international level is, of course, very different. Considering that international criminal law, in the modern era, is just over two decades old, not to mention the various limitations placed upon its enforcement by the current system of international relations, it appears wholly unfair to test its general deterrence standard by reference to domestic systems.
Moreover, while it is true that there are pronouncements from these very courts and tribunals suggesting a role for general deterrence, most of these institutions were created not for the purpose of fostering general deterrence, but rather as a means to deal with threats to international peace and security,Footnote 40 as part of international efforts to support the rule of law in certain regions,Footnote 41 or more simply to ensure retribution for the crimes committed during specific historical periods.Footnote 42
In practice, international criminal courts and tribunals – i.e., the judges issuing judgments of conviction or acquittal – do not appear to actively work towards the goal of general deterrence. Nowhere is this clearer than in the decisions on sentencing themselves. In fact, when the judges pen their written reasons for a specific sentence, they implicitly (and at times even explicitly) refuse to assign significant weight to general deterrence. Taking as an example the ICTY – the first of the contemporary international criminal tribunals, and the one that has issued the most decisions on guilt – two judgments elucidate the position in this respect. In Jokić, the judges acknowledged four main purposes of sentencing for international crimes: retribution, rehabilitation, special deterrence and general deterrence. In relation to the latter, they stated:
With regard to general deterrence, imposing a punishment serves to strengthen the legal order, in which the type of conduct involved is defined as criminal, and to reassure society of the effectiveness of its penal provisions. Nonetheless, it would be unfair, and would ultimately weaken the respect for the legal order as a whole, to increase the punishment imposed on a person merely for the purpose of deterring others. Therefore … the Trial Chamber has taken care to ensure that, in determining the appropriate sentence, deterrence is not accorded undue prominence.Footnote 43
In Deronjić, the judges added the important remark that, in modern criminal law, this approach to general deterrence is more accurately described as deterrence aiming at reintegrating potential perpetrators into global society.Footnote 44 The judges importantly noted:
One of the main purposes of a sentence imposed by an international tribunal is to influence the legal awareness of the accused, the surviving victims, their relatives, the witnesses and the general public in order to reassure them that the legal system is implemented and enforced. Additionally, the process of sentencing is intended to convey the message that globally accepted laws and rules have to be obeyed by everybody.Footnote 45
These pronouncements stand for at least two principles. First, international criminal courts and tribunals (the examples above include decisions signed by judges from a diverse set of legal systems and cultures all agreeing on these principles) do consider general deterrence within the aims of their work,Footnote 46 but refrain from assigning undue importance to this principle. Retribution, special deterrence and the rehabilitative purposes of punishment are also given consideration, and arguably play bigger roles than general deterrence when sentencing is assessed. Judges do not consider general deterrence of paramount importance when sentencing.
Second, even when general deterrence is taken into account in sentencing, it is often considered in the broader sense of influencing legal awareness, of fostering the internalization of the relevant rules in the minds of the general public. This function might be particularly strong in cases of guilty pleas, especially in proceedings against a high-level politician or military official. In such cases, the accused accepts his or her responsibility for certain crimes and therefore “sets the record straight”, so to say, thus arguably assisting in establishing the illegitimate and reprehensible character of the conduct in question.Footnote 47 In this sense, general deterrence is understood by the judges as encompassing an expressive function of international criminal law, which gives effect to – and therefore develops – the normative value of the legal system as a whole among the general public. It is in this expressive context that the preamble of the ICC Statute refers to the determination “to put an end to impunity for the perpetrators of these crimes and thus to contribute to the prevention of such crimes”. In other words, there should be no illusion that the ICC on its own will achieve the aim of preventing future crimes – but the Court is meant to be one of the paramount instruments at the disposal of the international community to entrench the awareness that serious criminal conduct has consequences, and that military and political leaders should not expect impunity.
The actual import of international jurisprudence in fostering compliance
Further, although the importance of international criminal courts and tribunals in fostering general compliance with IHL should certainly not be overestimated, we must be careful not to underplay the significant and, to a certain extent, decisive role that some of these institutions have in the development of the law of war writ large. It is probably unfair to say that, as Professor Jenks writes, thousands of pages of decisions by international criminal courts and tribunals have not factored into any service member's decision-making on whether to comply with IHL.Footnote 48
First, there is evidence that military commanders and lawyers take quite seriously legal and factual findings by international judges. To cite just one example, several military experts from various countries attempted to file an amicus curiae brief in the Gotovina appellate proceedings at the ICTY with the stated purpose of providing insights from military and civilian IHL experts who have studied, and in many cases undertaken, the process of targeting analysis in a populated area during hostilities. The experts in question submitted that it was “impossible to overstate the importance of the analysis and conclusions of any criminal adjudication of targeting decision-making in a context such as that reflected in the facts of this case”.Footnote 49 It seems hard to contend that the case and its legal significance have not given rise to keen interest among military experts. Similar attention has undoubtedly been paid to the judgments related to urban warfare during the siege of Sarajevo,Footnote 50 to the targeting of civilians in ZagrebFootnote 51 and to the shelling of Dubrovnik.Footnote 52
Moreover, for the past twenty years, various military manuals have referred to international criminal tribunals' case law when discussing applicable law.Footnote 53 Needless to say, the seminal Tadić interlocutory appeal decision of 2 October 1995 is universally cited as a basis for the applicability of (certain) war crimes to non-international armed conflict. The same could be said for the test to establish the existence of an armed conflict.Footnote 54 The International Committee of the Red Cross (ICRC) itself based several of its findings on the customary status of IHL rules on ICTY and other tribunals' case law.Footnote 55 Even UNESCO, when addressing the implementation of the 1954 Hague Convention for the Protection of Cultural Property in the Event of Armed Conflict, refers to ICTY case law.Footnote 56
These are just a few examples of the import of international criminal case law on the elaboration and implementation of IHL rules for decision-makers at all levels, including military officials. Recent reports have highlighted that ICC investigations into possible crimes in Afghanistan made “U.S. military lawyers … work … to match up the incidents the court is interested in with the various internal investigations conducted by the U.S. military”.Footnote 57 If true, these types of reports would signal a significant impact of the work of international criminal justice mechanisms on national compliance with international obligations. Although the ICC has been faulted for having little impact in practice on the “politics of impunity”,Footnote 58 it appears too simplistic to deny any deterrent effect of international criminal courts and tribunals' judgments and decisions.
Of course, it should not be decisive whether the influence stems directly from a judicial decision, or, for instance, from a military manual that was amended following such a decision. Effectiveness can be defined as the ability to induce a change away from the status quo in a desired direction, even if the result is less than full compliance:Footnote 59 the effectiveness of international criminal courts and tribunals in regard to general deterrence should therefore be assessed in a more holistic way, as the ability to foster behavioural changes and reinforce the legal ban on prohibited conduct, even when it is “mediated” by other legal and social instruments and does not directly flow from the text of an ICTY or ICC judgment. After all, even in domestic systems, it is doubtful that individuals consider trial and appellate judgments discussing the applicable legal standards for, say, murder or rape when deciding whether to proceed with the commission of these crimes: such standards find their ways into the conscience of individuals – and of society as a whole – through a myriad of avenues, including formal court pronouncements. One can start expecting the same trend in the international arena, although with the caveats mentioned above related to this area of law's early stages.
Courts and tribunals as participants in the international criminal justice system
Most importantly, complementarity must also be accounted for when evaluating the deterrent effect of international criminal courts and tribunals. It would be wrong to view the various international criminal justice institutions as isolated structures, for it is generally misleading to single out judicial institutions and assess their value in relation to general deterrence in a society on their own. Individual institutions, whether at the international or the domestic level, form part of a wider network of judicial actors – including law enforcement agencies – that, together, aim at addressing criminal conduct from a variety of angles and perspectives. It would be improper, for instance, to assess the general deterrence effectiveness of a single US federal appellate court, or of the military court in a single district. Similarly, it would be strange to state that, because people are still murdered throughout the world, domestic courts have not had any deterrent effect on potential offenders over the past millennia.
A holistic assessment should be undertaken with respect to the role of international criminal institutions within the global criminal justice structure, just as one would do in relation to the whole justice system within a country. In reality, the Preamble of the ICC Statute recalls “that it is the duty of every State to exercise its criminal jurisdiction over those responsible for international crimes”. The ICC has thus been hailed as an institution that does not intend to try a large number of cases: its primary purpose should rather be that of ensuring effective complementarity in action, i.e., domestic prosecution.Footnote 60 The ICTY and ICTR have rightly been described as aiming at another type of complementarity, namely trying only the most serious cases, while assisting domestic courts that must deal with the significant caseload concerning accused individuals who were not political or military leaders.Footnote 61 The STL, when trying the cases within its jurisdiction, explicitly sees its task as assisting “the strenuous efforts of the Government and people of Lebanon to reinforce the rule of law through due process”.Footnote 62 In all of these examples, the institutions clearly shy away from claiming an ability to achieve, or even striving for, a goal as high (and lofty) as general deterrence: international criminal institutions instead clearly seek synergies amongst themselves and, more importantly, with domestic judiciaries to create a web of interrelated jurisdictions that together ensure an increase in the repression of serious violations of IHL and of human rights.Footnote 63
This is why it is unrealistic to expect general deterrence from each one of these institutions by itself. Each of these courts and tribunals instead sees itself – and should be seen – as part of a developing system of international criminal justice, a system that is still clearly primitive and without “arms and legs”, but that has achieved much over the past couple of decades.Footnote 64 Even more relevant, these institutions, individually and collectively, appeal to policy-makers, NGOs and other actors such as the ICRC to share the burden of achieving legal compliance and of developing stricter standards for the protection of human rights, both in times of armed conflict and otherwise. They request funds, suggest new strategies and exchange expertise among themselves and with policy-makers, thus creating expectations and encouraging responses. They are actors in the international arena, which other actors, even those opposing them and their growing influence, must recognize and take into account. Over the past two decades, it is undeniable that these institutions, each in its own specific way, have contributed to fostering an environment where justice for mass atrocities is expected, and trials for serious violations of fundamental human rights have become part and parcel of the international discourse. The assumption at all levels is now that certain types of conduct demand effective prosecution, which was clearly not the case just twenty years ago.Footnote 65 This change of ethos must undoubtedly be seen as a first step on the path of general deterrence: it is only when individuals know that they may (or will) face justice for serious crimes that deterrence starts to meaningfully work.
Concluding remarks
It is true that the international criminal law “project” as a whole – together with its most vivid incarnation, the ICC – is an exercise in what Antonio Cassese liked to describe as “realistic utopia”.Footnote 66 It is a complex attempt to implement in practice the grand and noble goal of achieving justice for the worst atrocities, amidst the huge practical challenges posed by a sovereign-centred world, a landscape in which legitimacy and control are largely in the hands of States. This means, for the purposes of this discussion, that international criminal law and institutions will only be able to achieve (more or less) what States and other subjects of international law allow them to achieve; while they can push ahead in certain areas, they must expect pushback. More importantly still, the resources at their disposal – and how they are prioritized – are determined by others.
Yet, as the ICTY has held, and as mentioned above, decisions of international courts and tribunals influence the legal awareness of the accused, the surviving victims, their relatives, the witnesses and the general public, reassuring them that international criminal justice is implemented and enforced. International courts and tribunals have also represented a potent incentive for national courts to exercise criminal jurisdiction over serious human rights violations, within or outside armed conflicts.Footnote 67 Their decisions are not just moral statements. All of this, and the encouragement that States and other local actors receive from the ICC and other institutions to improve their capacity to reduce, detect and prosecute war crimes domestically,Footnote 68 contributes to deterrence, properly understood. When evaluating the purposes and efficacy of international judicial institutions, they must be seen as part of a wider system, a system that is having a significant impact on international law as applied by military and civilian actors around the world, both at the policy level and “on the ground”.