In the post-World War II international order, the principle of universal jurisdiction emerged as one of the most profound legal innovations in the pursuit of global justice. It permits national courts to prosecute individuals for grave international crimes, such as genocide, war crimes, crimes against humanity, and torture, regardless of where the crimes were committed or the nationality of the perpetrators and victims. This principle reflects a foundational belief in the universality of certain moral and legal norms: that some crimes are so egregious they offend humanity as a whole.

Universal jurisdiction thus operates as a safety net within the international legal system, ensuring accountability where domestic or international mechanisms are unable or unwilling to act. Yet, while it represents a powerful assertion of moral responsibility, it remains politically charged and inconsistently applied. This essay argues that universal jurisdiction, despite its imperfections and political challenges, remains an indispensable mechanism for upholding international justice when other avenues of accountability fail.

The origins of universal jurisdiction can be traced to the aftermath of World War II and the Nuremberg and Tokyo Tribunals, which established the precedent that individuals, not merely states, could be held criminally responsible for international crimes. However, it was the Eichmann trial in Israel in 1961 that firmly embedded universal jurisdiction in modern international law. Adolf Eichmann, one of the key architects of the Holocaust, was captured by Israeli agents in Argentina and tried in Jerusalem for crimes against humanity. Although Israel had no territorial or national connection to Eichmann’s crimes, the court justified its jurisdiction on the basis that the offences were of such magnitude that any state could, and indeed should, prosecute them. The trial marked a turning point, demonstrating that moral outrage could translate into judicial action and setting an enduring precedent for accountability.

Several decades later, the Pinochet case in the United Kingdom (1998) brought the doctrine of universal jurisdiction into contemporary relevance. Former Chilean dictator Augusto Pinochet was arrested in London on a Spanish warrant for acts of torture committed during his rule. The House of Lords, in a landmark judgment, held that Pinochet did not enjoy immunity from prosecution for acts of torture, as such crimes were universally condemned and prohibited under international law. This decision was revolutionary, signalling that former heads of state could be held accountable for international crimes irrespective of where they were committed. The Pinochet judgment reaffirmed the central tenet of universal jurisdiction: that no individual, however powerful, is above the law.

In recent years, universal jurisdiction has re-emerged as a crucial tool in addressing atrocity crimes where international courts, such as the International Criminal Court (ICC), have faced jurisdictional or political limitations. The most striking examples can be found in Europe’s response to the Syrian conflict. With the UN Security Council paralysed by geopolitical divisions and the ICC unable to act due to Syria’s non-membership, several European states, including Germany and France, have invoked universal jurisdiction to prosecute Syrian officials accused of war crimes and crimes against humanity.

Germany’s 2021 Koblenz trial marked a historic milestone: it was the first criminal trial worldwide against members of the Syrian regime for state-sponsored torture. The court convicted Anwar Raslan, a former intelligence officer, for crimes against humanity, affirming that justice could be pursued even in the absence of international consensus. France has also initiated investigations against Syrian officials and other perpetrators of international crimes under similar principles. These cases demonstrate the potential of universal jurisdiction to provide accountability and justice for victims when political inertia or jurisdictional gaps render other avenues ineffective.

However, universal jurisdiction remains far from universally accepted. Many states have either narrowed its application or used it selectively, often in response to political pressure or diplomatic sensitivities. High-profile prosecutions can strain international relations, particularly when directed at officials from powerful states or allied regimes. The result is a patchwork of practice, vigorous in some jurisdictions, absent in others, reflecting the complex interplay between law, politics, and morality.

The exercise of universal jurisdiction raises deep legal and ethical tensions, foremost among them the balance between state sovereignty and global accountability. Critics argue that allowing foreign courts to prosecute crimes committed abroad infringes on the sovereign equality of states and undermines the principle of non-interference. From this perspective, universal jurisdiction risks politicisation, with courts becoming instruments for advancing national or ideological agendas under the guise of justice.

Conversely, proponents maintain that sovereignty cannot serve as a shield for impunity. The principle of aut dedere autjudicare (“extradite or prosecute”) reflects the collective duty of states to prevent and punish atrocities that violate peremptory norms (jus cogens). When states fail to act, universal jurisdiction ensures that accountability does not depend on political will or territorial boundaries.

A further critique lies in the perceived selectivity of its application. Many scholars and activists have argued that universal jurisdiction has disproportionately targeted officials from the Global South, raising concerns of neo-colonial bias. Western states, often the strongest advocates for universal jurisdiction, have been more reluctant to subject their own military or political leaders to similar scrutiny. This asymmetry risks undermining the legitimacy of the doctrine and reinforces perceptions that international justice is selectively applied. Nonetheless, the growing willingness of domestic courts to prosecute crimes from diverse contexts, such as Rwanda, Liberia, and Syria, suggests that universal jurisdiction is slowly evolving towards a more balanced and principled practice.

For universal jurisdiction to fulfil its transformative potential, greater coordination and consistency among national jurisdictions are essential. Establishing clearer procedural standards, improving evidence-sharing mechanisms, and ensuring complementarity with international institutions such as the ICC could enhance both fairness and effectiveness. The European Network for Investigation and Prosecution of Genocide, Crimes against Humanity and War Crimes (the “Genocide Network”) already plays a crucial role in fostering cross-border cooperation, but broader global participation remains limited.

The ICC’s relationship with universal jurisdiction is particularly significant. While the Court embodies the principle of accountability at the international level, its jurisdictional limitations, restricted to member states or Security Council referrals, mean that universal jurisdiction can serve as a vital complement. When the ICC is blocked by political constraints or lacks jurisdictional reach, national courts exercising universal jurisdiction can fill the gap, ensuring that impunity does not prevail. In this way, universal jurisdiction and the ICC are not rivals but components of a shared architecture of global justice.

Looking forward, the challenge lies in depoliticising the application of universal jurisdiction and reinforcing its legitimacy as a neutral instrument of law. Strengthening judicial independence, enhancing transparency in prosecutorial decision-making, and ensuring that the principle is applied equitably across all regions will be crucial steps toward this goal.

Universal jurisdiction stands as both an aspiration and a test of the international community’s commitment to justice. It embodies the idea that the most serious crimes, those that shock the conscience of humanity, should not go unpunished, regardless of borders or political obstacles. From Eichmann to Pinochet, and from Syria to Ukraine, the exercise of this principle has challenged impunity and reaffirmed the universality of human rights and accountability.

Yet, the path forward is neither simple nor apolitical. Universal jurisdiction must navigate the twin dangers of overreach and neglect, ensuring that it remains grounded in law rather than politics. Its legitimacy will depend on its consistent, principled, and transparent application across all contexts.

In an era marked by renewed atrocities and eroding multilateralism, universal jurisdiction remains one of the few mechanisms capable of bridging the gap between justice and realpolitik. It is, and must remain, a vital instrument of moral and legal necessity, a reminder that the pursuit of global justice cannot depend solely on the willingness of states, but on the enduring force of law and conscience.