This Article is written by Nipun Vats of O.P. Jindal Global University, an intern under Legal Vidhiya.
Abstract
The Russia-Ukraine conflict has exposed fundamental limitations in the International Court of Justice’s ability to enforce its judgments against powerful state actors. Despite multiple ICJ rulings ordering Russia to suspend military operations and finding violations of international conventions, Russia has systematically refused to comply. This paper examines the ICJ’s proceedings in the Ukraine cases, analyzing the structural deficiencies that prevent effective enforcement. The analysis reveals that the ICJ operates within a voluntary compliance framework where jurisdiction depends on state consent, and enforcement mechanisms prove illusory when permanent Security Council members can veto accountability measures. These limitations reflect broader tensions between legal authority and political power, where state sovereignty often supersedes the rule of law. Without comprehensive reforms establishing genuine accountability mechanisms, the ICJ risks irrelevance in addressing contemporary threats to international peace and security.
Keywords
International Court of Justice, international law enforcement, Russia-Ukraine conflict, state sovereignty, UN Security Council.
Introduction
The Second World War radically disrupted the international order, revealing the need for a more potent framework for global governance. This led to the establishment of the United Nations and the signing of the UN Charter, which also laid the foundation for the International Court of Justice (ICJ). The Court holds primary jurisdiction over disputes between states and provides advisory opinions to other UN organizations as well. Over the decades, it has played a significant role in resolving complex maritime, territorial, and human rights issues between nations. However, the ongoing Russia-Ukraine conflict, which escalated in February 2022, falls squarely within the ICJ’s jurisdiction, yet the Court’s multiple rulings have failed to bring about a resolution. This persistent impasse raises critical questions about the enforceability of the Court’s judgments and more broadly, the limitations of international legal mechanisms when confronted with powerful state actors unwilling to comply. The case underscores a fundamental tension in international law, while the ICJ can adjudicate and rule, it lacks power to compel compliance, leaving its authority dependent on the political will of states and the UN Security Council, where enforcement can be blocked or vetoed by the very parties involved in the conflict.
The Russia-Ukraine Conflict
The Russia-Ukraine conflict represents one of the most consequential geopolitical crises of the twenty-first century, fundamentally challenging the post-Cold War international order and testing the resilience of international legal institutions. While Russia’s full-scale invasion commenced on February 24, 2022, the conflict’s origins trace back to February 2014, when disguised Russian military forces covertly seized control of Crimea, Ukraine’s autonomous peninsula. This annexation, completed through a disputed referendum in March 2014, marked the first time since World War II that a European nation employed military force to seize another’s territory. The annexation drew immediate international condemnation and sanctions, however Russia has maintained its position, altering the security landscape of Eastern Europe entirely.
The conflict arose in April 2014 when Russian-backed separatists, including former Federal Security Service officer Igor Girkin, seized control of administrative buildings and declared independence in Ukraine’s eastern Donbas region, comprising Donetsk and Luhansk oblasts. The Ukrainian government forces launched Operations to counter this insurgency, which has precipitated into a protracted conflict that has claimed over 14,000 lives between 2014 and early 2022. Despite the Minsk Agreements of 2014 and 2015, which established ceasefire protocols and called for constitutional reforms recognizing the special status of the separatist regions, their implementation has proved impossible. The conflict has transformed into entrenched warfare, with approximately 75,000 troops facing each other across a 420-kilometer front line cutting through densely populated areas. The war has devastated the region’s economy, forced millions to flee their homes, and left the conflict zone among the world’s most heavily contaminated with landmines and unexploded ordnance.
Russia’s full-scale invasion in February 2022 split the war into multiple fronts, with Russian forces launching simultaneous offensives from Belarus, Russia, and occupied Crimea. Although Russian forces initially captured significant territory and threatened the capital city of Kyiv, Ukrainian defenders mounted fierce resistance, deterring attempts to seize the capital and launching successful counteroffensives, reclaiming substantial territory by late 2022. The human cost has been catastrophic. As of October 2024, the United Nations verified over 39,000 civilian casualties, including more than 12,000 deaths, though actual figures are likely to be higher. Military casualties remain contested, with estimates suggesting hundreds of thousands killed and wounded on both sides. Furthermore, the conflict has displaced over one-third of Ukraine’s pre-war population, with more than eight million refugees fleeing abroad and millions more internally displaced.
The war has inflicted devastating damage on civilian infrastructure, particularly Ukraine’s energy grid, which has faced systematic Russian missile and drone attacks, rendering the country uninhabitable during harsh winter months. The deliberate destruction of the Kakhovka Dam in June 2023 flooded approximately 240 square miles of territory, killing scores of civilians, and leaving close to one million people without potable water. Even beyond Ukraine’s borders has the conflict triggered global food security concerns as Ukraine and Russia collectively account for substantial portions of world grain exports and the Black Sea plays a critical role in trade. The war has fundamentally strained relations between Russia and Western nations, prompting unprecedented economic sanctions and military aid packages to Ukraine, while simultaneously threatening a return to Cold War-era divisions that could reshape the international system for decades to come.
Proceedings in the International Court of Justice
The International Court of Justice rendered a decisive ruling on March 16, 2022, ordering Russia to immediately suspend military operations that had commenced on February 24, 2022, in Ukrainian territory. The Court’s decision, adopted by a margin of 13 votes to 2, represented one of the most consequential provisional measures in the ICJ’s history. Vice-President Kirill Gevorgian of Russia and Judge Xue Hanqin of China cast the only dissenting votes. Despite the overwhelming majority supporting Ukraine, the Russian Federation promptly rejected the decision through Kremlin spokesperson Dmitry Peskov, who stated that Russia could not “take this preliminary decision into account.” This immediate defiance set a troubling precedent for the Court’s authority in addressing one of the most significant armed conflicts since the Court’s establishment.
The Court determined that it possessed jurisdiction under Article IX of the Genocide Convention, which empowers the ICJ to resolve disputes arising from the Convention’s interpretation and application. President Joan E. Donoghue noted in the ruling that the Court had not seen evidence to substantiate Russia’s claims that Ukraine had committed genocide against Russian-speaking populations in the Donbas region. The provisional measures also required both parties to refrain from actions that might aggravate or prolong the dispute. However, judge ad hoc Yves Daudet criticized this symmetrical directive, arguing that non-aggravation measures should have been directed solely at Russia, which was designated by the United Nations General Assembly as the perpetrator of aggression against Ukraine.
The ICJ delivered two landmark judgments in early 2024 that significantly shaped the legal landscape surrounding the Russia-Ukraine conflict. On January 31, 2024, the Court issued its ruling in the case of the Application of the International Convention for the Suppression of the Financing of Terrorism and the International Convention on the Elimination of All Forms of Racial Discrimination. The Court found that Russia had violated its obligations under the convention by failing to adequately investigate allegations of terrorism financing. Additionally, the Court determined that Russia breached the racial discrimination convention, particularly regarding the educational rights of Ukrainian-speaking communities in Crimea following Russia’s annexation of the peninsula in 2014. The ruling acknowledged the serious and ongoing violations against the Crimean Tatar population, including restrictions on their cultural, linguistic, and political rights. However, the Court dismissed the majority of Ukraine’s allegations, limiting the scope of Russia’s adjudicated violations.
On February 2, 2024, the ICJ unanimously rejected Russia’s preliminary objections in the genocide case, allowing the proceedings to advance to the merits phase. This decision represented a significant procedural victory for Ukraine, as it confirmed the Court’s jurisdiction to examine whether Ukraine committed genocide in the Donetsk and Luhansk regions, as Russia had alleged. Notably, however, the Court ruled it would not address whether Russia violated the Genocide Convention by using false genocide allegations as a pretext for invasion, even though such a use might constitute a violation of international law more broadly. This limitation disappointed many observers who viewed Russia’s invocation of genocide as a central element of the conflict’s legal dimensions. Triestino Mariniello, a law professor at Liverpool John Moores University, emphasized that the ruling’s importance lay in confirming a genuine dispute between the parties regarding the Genocide Convention’s application, thereby enabling the case to proceed toward a final judgment on the merits.
On December 5, 2024, the ICJ accepted Russia’s counterclaims against Ukraine for hearing under the Genocide Convention. This development added another layer of complexity to the already intricate legal proceedings, with Russia having submitted extensive evidence regarding its allegations that Ukraine committed acts of genocide against Russian-speaking populations in eastern Ukraine. The acceptance of these counterclaims ensures that the legal battle will continue for years, with both parties now positioned as simultaneous applicant and respondent in parallel proceedings.
Challenges and limitations
The International Court of Justice stands as the principal judicial organ of the United Nations, established to serve as the cornerstone of the international legal order. Over seven decades, the Court has adjudicated numerous disputes between states, rendered advisory opinions, and contributed substantially to the development of international law. Despite these achievements, the ICJ confronts fundamental challenges that significantly constrain its effectiveness in maintaining global peace and security. These limitations stem from jurisdictional restrictions based on state consent, the absence of robust enforcement mechanisms, and the inherent tension between legal authority and political power in the international system.
The most significant limitation facing the ICJ derives from the foundational principle that the Court exercises jurisdiction only with the consent of the parties involved. Article 36 of the ICJ Statute establishes multiple pathways through which states may accept the Court’s jurisdiction, yet each pathway remains fundamentally voluntary. States may submit disputes through special agreements, accept jurisdiction through compromising clauses in treaties, or make declarations under the Optional Clause system recognizing the Court’s compulsory jurisdiction. However, the term “compulsory jurisdiction” itself represents something of a misnomer as it exists only between states that have mutually consented to be bound by it.
As of 2023, only 74 states have deposited declarations accepting the Court’s compulsory jurisdiction under Article 36(2), representing fewer than 40 percent of United Nations member states. This limited participation creates what scholars have characterized as a patchwork quilt of legal obligations, fundamentally undermining the universality and reach of the ICJ’s authority. Moreover, the states that have accepted compulsory jurisdiction often attach extensive reservations that significantly narrow the scope of disputes subject to the Court’s review. These reservations may exclude matters deemed to fall within domestic jurisdiction, disputes arising before specific dates, or entire categories of cases such as maritime boundaries or military activities issues.
The practice of attaching reservations has become increasingly sophisticated and strategic. States have employed “automatic reservations”, which allow them to unilaterally determine whether a dispute falls within their national jurisdiction, effectively enabling them to opt out of cases they find unfavourable. Other states have drafted tailored reservations designed to preclude specific types of litigation. Following the 2016 Nuclear Disarmament case, the United Kingdom introduced a reservation preventing states from bringing cases related to nuclear weapons or nuclear disarmament against it. Similarly, Japan amended its declaration in 2015 to exclude disputes concerning research on or conservation of living resources of the sea in response to Australia’s whaling litigation.
Perhaps most problematic, states retain the ability to withdraw their acceptance of compulsory jurisdiction entirely, as the United States demonstrated in 1986 following the Nicaragua case. This withdrawal mechanism enables powerful states to avoid unfavourable judgments by simply removing themselves from the Court’s jurisdiction when litigation threatens their interests. The optional nature of the ICJ’s jurisdiction thereby creates a system where states submit only when it serves their strategic interests, and where those most likely to violate international law are least likely to subject themselves to judicial scrutiny.
Even when the ICJ successfully establishes jurisdiction and renders judgment, a second fundamental limitation emerges: the Court possesses no independent enforcement mechanisms. Article 94 of the United Nations Charter establishes that member states undertake to comply with ICJ decisions in cases to which they are parties, but this obligation exists largely as a matter of international comity rather than coercive enforcement. The Charter provides that if a party fails to perform its obligations under a judgment, the Security Council may make recommendations or decide upon measures to give effect to the judgment. However, this enforcement mechanism proves illusory when a permanent Security Council member or its ally is the subject of non-compliance.
The structural defect is clear, any resolution seeking to compel compliance with an ICJ ruling can be vetoed by any of the five permanent Security Council member, who are the states most likely to be involved in serious international disputes. This creates what international legal scholars have termed the “unreliability of political enforcement mechanisms.” The International Court does not enjoy a genuine separation of powers, as permanent members of the Security Council can veto enforcement of cases, even those to which they initially consented to be bound. This arrangement fundamentally distinguishes the ICJ from domestic supreme courts, which operate within integrated legal systems backed by executive enforcement power and checks and balances that ensure judicial decisions are implemented.
The Nicaragua case provides the archetypal example of this enforcement paralysis. After the ICJ ruled in 1986 that the United States had violated international law through its support of Contra rebels and its mining of Nicaraguan harbours, Nicaragua sought Security Council enforcement of the judgment. The United States exercised its veto power five times between 1982 and 1986 to block enforcement resolutions, rendering the Court’s carefully reasoned judgment effectively meaningless. Although the United Nations General Assembly subsequently passed a resolution calling for compliance by a vote of 94 to 3, this non-binding expression carried no weight. The United States ultimately withdrew from the ICJ’s compulsory jurisdiction, and Nicaragua withdrew its complaint in 1992 under a new government, leaving the judgment unenforced and reparations unpaid.
The Russia-Ukraine conflict presents a contemporary manifestation of this same structural weakness. Despite multiple ICJ rulings ordering Russia to suspend military operations and finding violations of international conventions, Russia has systematically refused to comply. Any attempt to enforce these judgments through the Security Council would inevitably face a Russian veto, rendering the enforcement mechanism entirely inoperative. This reality has led some scholars to observe that the ICJ’s effectiveness has become contingent on voluntary compliance and the reputational costs of non-compliance, considerations that carry minimal weight when powerful states perceive vital national interests to be at stake.
Beyond these primary structural challenges, the ICJ faces several additional constraints that diminish its effectiveness. The Court can only adjudicate disputes between states, excluding individuals, corporations, non-governmental organizations, and sub-state entities from direct participation. This limitation prevents the Court from addressing many contemporary international legal issues that involve non-state actors, including multinational corporations, terrorist organizations, and transnational criminal networks. Moreover, the ICJ’s advisory opinions, while influential in shaping international legal discourse, lack binding force and are frequently ignored by states that find them politically inconvenient.
The Court also confronts challenges related to ethnic minority representation within states. While a state may bring cases on behalf of some citizens, marginalized ethnic groups often find themselves entirely unrepresented in ICJ proceedings, raising concerns about the inclusivity and adequacy of the Court’s deliberations. Furthermore, the ICJ operates independently from other international judicial bodies such as the International Criminal Court, creating coordination challenges and potential inconsistencies in the application of international law across different tribunals.
These limitations are not merely technical defects but reflect fundamental tensions in the contemporary international legal architecture. The ICJ operates within a system that simultaneously affirms the rule of law while preserving state sovereignty as its organizing principle. Proposals for reform have included establishing collaborative enforcement mechanisms with defined consequences for non-compliance, creating liaison teams to coordinate with UN peacekeeping forces, and strengthening the Court’s relationship with other UN bodies. However, implementing such reforms would require unprecedented cooperation from those very powerful states that benefit most from the current system’s weaknesses and inadequacies.
The Russia-Ukraine conflict serves as a stark reminder that when powerful states choose to disregard international law, the mechanisms designed to enforce compliance prove fundamentally inadequate. The ICJ’s detailed, well-reasoned judgments stand as important contributions to international legal discourse, yet they remain largely symbolic without effective enforcement mechanisms. More than 70 years since the United Nations’ founding, the Security Council has never successfully employed Article 94(2) to enforce an ICJ judgment, underscoring the gap between the Court’s legal authority and its practical power. This reality calls into question not merely the ICJ’s effectiveness but the viability of the current international legal order in addressing the most serious threats to peace and security. Until the international community develops enforcement mechanisms that can constrain even the most powerful states, the ICJ will remain an institution whose authority ultimately depends on the voluntary cooperation of those it seeks to restrain.
Implications for the Future of International Law
The structural deficiencies exposed by the Russia-Ukraine conflict carry profound implications for the future trajectory of international law. The international legal order stands at a critical juncture, confronting an increasingly multipolar world characterized by competing visions of global governance and diverging interpretations of foundational legal principles. The emergence of what has been termed “multipolarization without multilateralism” threatens to fragment the international legal system into competing normative frameworks, potentially undermining seven decades of progress in establishing universal standards of state conduct. This fragmentation manifests most visibly in the growing divide between Western states’ advocacy for a “rules-based international order” and the emphasis by BRICS nations and much of the Global South on adherence to international law as codified in the UN Charter and related instruments.
The ICJ’s inability to compel compliance from major powers fundamentally challenges the Court’s credibility and by extension, the broader principle that international law applies equally to all states regardless of their power. When powerful states systematically disregard judicial pronouncements without consequence, it creates a dangerous precedent that erodes the normative foundation upon which international law rests. Middle powers and smaller states, observing that the most powerful actors face no meaningful accountability for violating international legal obligations, may increasingly question whether adherence to international law serves their interests. This erosion of confidence threatens to transform international law from a system of binding obligations into a collection of aspirational principles that states observe only when convenient. The Munich Security Report 2025 warns that we are witnessing “the negative scenario of a more multipolar world materialize—a more conflictual world without shared rules and effective multilateral cooperation.”
Emerging reform proposals reflect growing recognition that incremental adjustments will prove insufficient to address these systemic challenges. The formation of The Hague Group in January 2025, comprising Bolivia, Colombia, Cuba, Honduras, Malaysia, Namibia, Senegal, and South Africa brings forth a new approach whereby coalitions of states may pursue coordinated legal and diplomatic measures to enforce ICJ decisions outside traditional UN frameworks. Civil society organizations have similarly intensified advocacy for institutional reforms, including proposals to expand compulsory jurisdiction, allow non-state actors including individuals and NGOs to bring cases or participate in proceedings, and strengthen cooperation between the ICJ and regional courts such as the African Court on Human and Peoples’ Rights or the European Court of Human Rights. These proposals envision a more inclusive and accessible ICJ that could “close the justice gap in global governance, reaffirming the principle that no state, no matter how powerful, is above the law.”
However, meaningful reform confronts formidable obstacles. Establishing compulsory jurisdiction over all UN member states, particularly in areas involving human rights, environmental law, or crimes against humanity, would require amending the ICJ Statute or the UN Charter, a politically arduous process requiring consensus among those states that benefit most from the current systems. The International Law Commission’s ongoing work on topics such as general principles of law and subsidiary means for determining rules of international law reflects continuing efforts to strengthen the doctrinal foundations of international adjudication, yet these technical improvements cannot remedy the fundamental enforcement deficit. Some scholars have suggested alternative approaches, including enhanced use of advisory opinions as legal benchmarks for national and regional courts and collaborative enforcement mechanisms with defined consequences for non-compliance coordinated through UN peacekeeping forces. The General Assembly’s December 2024 establishment of mechanisms to follow up on ICJ findings regarding Israeli violations in the Occupied Palestinian Territory represents one such experimental approach, though its ultimate effectiveness remains uncertain.
The most troubling prospect is that continued non-compliance by major powers may precipitate a broader legitimacy crisis affecting not merely the ICJ but the entire architecture of international legal institutions. When the Security Council has never successfully employed Article 94(2) to enforce an ICJ judgment in more than seven decades, when permanent members routinely veto accountability measures, and when states can simply withdraw from the Court’s jurisdiction when faced with adverse rulings, the gap between legal theory and political reality becomes unsustainable. This dynamic risks accelerating what some observers characterize as “the Great Fragmentation”—the disintegration of the post-1945 international order into competing legal regimes reflecting divergent geopolitical alignments. In such a fragmented system, universal principles give way to regional arrangements, multilateral institutions lose effectiveness, and the prospect of coordinated responses to transnational challenges from climate change to pandemic disease becomes increasingly remote.
The Russia-Ukraine conflict has exposed fundamental weaknesses in the international legal order that demand urgent attention. The ICJ’s inability to enforce its judgments against powerful states reveals a system where legal authority depends ultimately on voluntary compliance rather than institutional capacity for enforcement. As the world transitions toward multipolarity amid declining multilateralism, the risk of legal fragmentation intensifies, potentially rendering international law ineffective precisely when global coordination is most essential. Without comprehensive reforms establishing genuine accountability mechanisms and expanding universal jurisdiction, the ICJ and broader international legal institutions risk irrelevance in addressing the twenty-first century’s most pressing challenges to peace and security.
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