The Role of International Courts in Revising Justice Across Borders

The Peace of Westphalia (1648) established a principle that organized international relations for the next three centuries: states are sovereign within their borders, and other states have no right to interfere in domestic affairs. This principle served genuine purposes — it ended a period of devastating religious wars in Europe in which outside powers intervened in each other's internal conflicts on theological grounds. Westphalian sovereignty created space for states to develop without constant external interference.

But sovereignty, as an absolute principle, produced a catastrophic accountability gap. Leaders who massacred their own populations, enslaved their own citizens, or organized state violence on an industrial scale could claim the protection of sovereign immunity. No court could reach them. No external authority could compel accountability. The only recourse was diplomatic pressure or military intervention, both heavily constrained by the same sovereignty norm.

The twentieth century demonstrated the costs of this arrangement with unparalleled clarity. The Armenian genocide of 1915–1923, in which the Ottoman state killed between 600,000 and 1.5 million Armenians, produced no legal accountability. The perpetrators died in exile or were assassinated; no international tribunal existed to try them. The interwar period produced Raphael Lemkin, a Polish-Jewish lawyer who had watched the Armenian genocide and then survived the Holocaust, and who spent the rest of his life developing the legal concept of genocide and arguing for international law capable of punishing it. Lemkin's work was the intellectual foundation for Nuremberg.

The Nuremberg trials were not, by any rigorous standard, a model of procedural justice. The tribunal was constituted by the victorious powers. The Soviet Union, which participated as a prosecuting party, had itself committed mass atrocities — the Katyn massacre of Polish officers, the violations of the Molotov-Ribbentrop Pact — that were never subjected to equivalent scrutiny. The charge of crimes against peace — aggressive war — was applied retroactively to conduct that had not been clearly criminalized under existing international law at the time it occurred. The criticism that Nuremberg was "victors' justice" was not without foundation.

And yet: the trials established precedents of lasting importance. They created a functioning record of Nazi atrocities that could not subsequently be denied. They articulated, for the first time in a legal proceeding, the principle that following superior orders did not excuse participation in crimes against humanity. They established that heads of state and senior officials could not hide behind sovereign immunity when charged with the gravest categories of human rights violation. And they produced the Nuremberg Principles — a codification of the legal standards applied in the trials — which became the foundation for subsequent international criminal law.

The revision accomplished at Nuremberg was partial and compromised but irreversible in its core direction. The concept that individuals bear personal legal accountability for atrocities, regardless of their official status, had been given institutional expression. It could be built upon.

In parallel with the criminal accountability project, the postwar period saw the revision and expansion of international humanitarian law — the rules governing conduct during armed conflict. The original Geneva Convention dates to 1864, when Swiss activist Henri Dunant, horrified by the suffering he had witnessed at the Battle of Solferino, organized what would become the International Committee of the Red Cross and campaigned for international agreement on the treatment of wounded soldiers.

The 1949 revisions — four Conventions rather than one — dramatically expanded the scope of this law. The First and Second Conventions addressed wounded and shipwrecked soldiers; the Third addressed prisoners of war; the Fourth, crucially, extended protections to civilian populations in armed conflict for the first time. This last revision was the direct response to World War II's systematic targeting of civilians — in strategic bombing campaigns, in deliberate starvation, in the Holocaust. The Fourth Convention acknowledged that the definition of protected persons had to expand if the law was to have any relevance to how modern wars were actually fought.

Further revisions came in 1977 through the Additional Protocols, which extended protections to conflicts of a non-international character — civil wars and internal armed conflicts — filling a gap that had allowed states to claim that international humanitarian law simply did not apply to their treatment of domestic insurgents.

This incremental, protocol-by-protocol revision process is characteristic of how international law actually develops: not through grand unified designs but through the identification of specific gaps, failures, and inadequacies made visible by actual conflicts, followed by treaty negotiations that attempt to address those specific problems. Each conflict becomes a case study for the next revision.

The end of the Cold War removed the veto paralysis that had prevented Security Council action on international accountability questions for four decades. The result, in the 1990s, was a pair of ad hoc tribunals that served as critical revision points for the Nuremberg project.

The International Criminal Tribunal for the former Yugoslavia (ICTY), established in 1993, addressed atrocities committed in the Balkan wars. The International Criminal Tribunal for Rwanda (ICTR), established in 1994, addressed the genocide in which approximately 800,000 Tutsi and moderate Hutu were killed in roughly one hundred days. Both tribunals were created by Security Council resolution rather than treaty — a mechanism that gave them compulsory jurisdiction but also made them dependent on Security Council politics.

Both tribunals produced important legal developments. The ICTY's jurisprudence on systematic rape as a war crime and on command responsibility — the doctrine that commanders bear criminal responsibility for atrocities committed by subordinates they failed to prevent or punish — significantly advanced international criminal law. The ICTR produced the first international conviction specifically for the crime of genocide, applying the 1948 Genocide Convention in a live criminal proceeding for the first time.

Both tribunals also revealed serious institutional weaknesses: they were expensive, slow, geographically distant from the communities whose suffering they were adjudicating, and dependent on state cooperation for arrest of accused persons. Slobodan Milosevic spent years in ICTY proceedings and died before verdict. The ICTR's distance from Rwanda made it largely irrelevant to Rwandan society's actual process of reckoning, which found expression instead in the gacaca community courts — a hybrid of traditional and modern justice mechanisms that processed approximately two million cases between 2001 and 2012.

The ad hoc tribunals were, in the language of Law 5, first drafts. They demonstrated what international criminal justice could do and mapped its current limitations. They generated the institutional knowledge that informed the design of the ICC.

The Rome Statute, negotiated in 1998 and entering into force in 2002, established the International Criminal Court as a permanent institution with prospective jurisdiction — able to prosecute crimes committed after its establishment, by nationals of states parties or on the territory of states parties, when national courts fail to act.

The ICC's design incorporated lessons from the ad hoc tribunals. Complementarity — the principle that the ICC acts only when national courts are unable or unwilling to genuinely prosecute — was intended to give states an incentive to conduct their own proceedings rather than leaving accountability to an external body. The Prosecutor's office was given independent authority to open investigations, reducing (though not eliminating) the dependence on Security Council politics. Provisions for victim participation and reparations addressed a significant gap in the Nuremberg-ICTY-ICTR model, which had focused almost exclusively on criminal accountability rather than acknowledgment and repair for those harmed.

The ICC's record has been deeply contested. Its first two decades produced a caseload heavily weighted toward African defendants, generating legitimate criticism that it was being used selectively by powerful states against weaker ones while the conduct of major powers escaped scrutiny. The United States, Russia, China, and India — which together represent the majority of global military power — are not ICC member states. When US forces commit war crimes in Afghanistan, or Russian forces in Ukraine, the ICC may open investigations but faces severe practical limits on accountability for great-power conduct.

These limitations are real. They also reflect accurately where civilization currently stands on the question of international accountability — and understanding where you actually are is the prerequisite for meaningful revision. The ICC's existence means that the question "who will be held accountable for this?" can now be asked of any conflict, anywhere. The answer is often unsatisfying. But the question itself is a revision — it inserts into the international conversation an expectation that was not previously there.

Alongside the criminal accountability architecture, the UN Human Rights Council's Universal Periodic Review process represents a different model of international justice revision: not criminal accountability after the fact, but systematic review of ongoing human rights practices across all UN member states.

Under the UPR, every UN member state is reviewed every four and a half years by a peer review mechanism. States submit reports, civil society organizations submit shadow reports, and the Council issues recommendations. The mechanism is deliberately designed with no enforcement power — it is purely a review and recommendation function.

This seems weak. In practice, states respond to UPR recommendations at varying rates, and the political cost of accepting or rejecting recommendations is low. But the UPR does something different from criminal accountability: it normalizes the expectation of external review itself. It treats the human rights practices of every state, including powerful ones, as legitimately subject to international scrutiny. The United States, China, Saudi Arabia, and North Korea have all been reviewed. They have all received recommendations. The recommendations are not uniformly implemented. But the practice of submitting to and engaging with review is itself a civilizational revision — it says that no state's domestic practices are beyond legitimate international interest.

International courts, taken together, are engaged in a multigenerational project of revising the concept of accountability at civilizational scale. The project is not linear. It faces persistent resistance from states whose interests are served by the principle that power insulates against accountability. It is compromised by the same power asymmetries it exists to address. Major powers continue to operate by rules they do not permit others.

But the direction of institutional development — from Nuremberg's improvised tribunal to the permanent ICC, from the original Geneva Convention to the four-convention architecture and its Additional Protocols, from the postwar human rights declarations to the UPR review mechanism — is consistently toward greater accountability, wider jurisdiction, and more refined procedural standards.

What is being slowly revised is the foundational assumption that sovereignty is absolute. In its place, an alternative principle is being constructed: that certain categories of conduct are simply off the table for all states, that individual perpetrators cannot hide behind state authority for those categories, and that the community of states has both the right and the responsibility to hold violators accountable. This is the revision international courts are making, case by case, precedent by precedent, over the arc of decades. The work is incomplete. It will remain incomplete for the foreseeable future. But the direction of revision matters more than the current state of its completion.