Difference Between ICC and ICJ

In the world of international law, two courts are often confused with each other because of their similar names and the fact that both are located in The Hague, Netherlands. These are the International Criminal Court (ICC) and the International Court of Justice (ICJ). Although both deal with international justice, they are fundamentally different in their purpose, scope, jurisdiction, and composition.

The International Court of Justice (ICJ) is the principal judicial organ of the United Nations, responsible for settling disputes between states and providing advisory opinions on matters of international law. On the other hand, the International Criminal Court (ICC) is an independent international tribunal established under the Rome Statute to prosecute individuals responsible for the most serious international crimes such as genocide, war crimes, crimes against humanity, and aggression.

Historical Background of ICC and ICJ

The International Criminal Court (ICC)

The idea of creating a permanent international criminal court first came up in 1919 at the Paris Peace Conference, after the end of the First World War. It was meant to prosecute political leaders and individuals responsible for war crimes. Although discussions continued under the League of Nations in 1937, the idea could not be implemented.

After the Second World War, temporary tribunals like the Nuremberg Tribunal and the Tokyo Tribunal were set up to try Axis leaders for atrocities committed during the war. These trials showed the international community that there was a real need for a permanent institution that could prosecute individuals who commit heinous crimes affecting the international community as a whole.

In 1948, the United Nations General Assembly formally recognised this need and asked the International Law Commission (ILC) to draft a statute. However, progress stalled during the Cold War due to political differences. The idea was revived in 1989, and after years of deliberation, the Rome Statute was adopted in 1998. It finally came into force in 2002, leading to the establishment of the International Criminal Court as a permanent body to prosecute individuals for international crimes.

The International Court of Justice (ICJ)

The International Court of Justice has a different history. It is the successor to the Permanent Court of International Justice (PCIJ), which was created in 1922 under the League of Nations. The PCIJ heard several disputes between states but lost relevance with the outbreak of the Second World War.

When the United Nations was founded in 1945, it was decided that a new court was needed as part of the UN framework. This led to the creation of the International Court of Justice under the UN Charter. The ICJ officially began work in 1946, taking over the archives and premises of the PCIJ.

Thus, while the ICC was created as an independent tribunal under a treaty (Rome Statute), the ICJ was created as an integral organ of the United Nations.

Key Differences Between ICC and ICJ

Relationship with the United Nations

The relationship of each court with the United Nations highlights their structural difference:

• The International Criminal Court (ICC) is not a part of the United Nations. It is an independent organisation, though it works in cooperation with the UN. Importantly, the UN Security Council has the power to refer cases of international crimes to the ICC, even if the crimes took place in a country that is not a member of the Rome Statute.
• The International Court of Justice (ICJ), by contrast, is the principal judicial organ of the United Nations. It functions as part of the UN system, and its rulings are expected to be implemented by member states, with the UN Security Council playing a role in enforcement.

Membership

Membership of both courts also differs in scale and inclusivity:

• The ICC currently has about 120 member states, all of which are parties to the Rome Statute. Some major powers, such as the United States, Russia, China, and India, have either not signed or not ratified the Rome Statute. Several countries, including Burundi, South Africa, and the Philippines, have also withdrawn from the ICC over concerns that it disproportionately targets leaders from developing nations. This makes ICC membership relatively limited and politically sensitive.
• The ICJ, on the other hand, enjoys universal membership. All 193 United Nations member states are automatically members of the ICJ. Non-UN members can also accept its jurisdiction by ratifying the Statute of the ICJ. This makes the ICJ a more universally representative forum compared to the ICC.

Scope of Work

The difference in the scope of work between the ICC and ICJ is one of the most significant:

• The International Criminal Court focuses on individual criminal responsibility. It prosecutes individuals for crimes that shock the conscience of humanity, including:
  • Genocide, which refers to the deliberate destruction of a national, ethnic, racial, or religious group.
  • Crimes against humanity, such as widespread murder, enslavement, rape, or deportation of civilian populations.
  • War crimes, including violations of the Geneva Conventions like targeting civilians, using child soldiers, or mistreating prisoners of war.
  • The crime of aggression, which was added to its jurisdiction in 2018, covering the illegal use of armed force by one state against another.
• The ICC is often referred to as the “court of last resort” because it intervenes only when national judicial systems are unwilling or unable to prosecute such crimes.
• The International Court of Justice, by contrast, deals with state responsibility. It settles legal disputes between states and provides advisory opinions on questions referred to it by UN bodies and specialised agencies. Its work includes cases relating to:
  • Territorial and maritime boundary disputes.
  • Alleged violations of international treaties.
  • Questions of diplomatic relations and immunity.
  • Use of force and allegations of genocide (but only when brought by one state against another).

This distinction makes the ICJ a civil court of international law, while the ICC acts as a criminal tribunal for individuals.

Jurisdiction

The jurisdiction of the two courts also highlights their differences:

• The ICC can try individuals only, and its jurisdiction is limited to:
  • Crimes committed on the territory of a member state.
  • Crimes committed by nationals of a member state.
  • Crimes referred by the UN Security Council, even if the state concerned is not a member.
• This makes the ICC’s jurisdiction narrower but very specific, dealing only with serious international crimes.
• The ICJ, on the other hand, can hear disputes between states on almost any issue of international law. However, states must consent to the ICJ’s jurisdiction before a case can proceed. The ICJ cannot hear cases brought by individuals, corporations, or NGOs.

Composition

Both courts are composed of international judges, but their selection process and structure differ:

• The ICC consists of 18 judges, each elected by the Assembly of States Parties for a term of nine years. No two judges may be from the same country. The court also has an independent Prosecutor, who investigates crimes and initiates prosecutions.
• The ICJ is made up of 15 judges, elected for nine-year terms by both the UN General Assembly and the Security Council. Elections are staggered, with five judges elected every three years to ensure continuity. Judges are distributed according to regions to ensure global representation.

Enforcement of Decisions

One of the biggest challenges faced by both courts is enforcement:

• The ICC has no police force of its own. It depends entirely on member states to arrest suspects and enforce sentences. Many leaders indicted by the ICC, including some sitting heads of state, have managed to avoid arrest because states have refused to cooperate.
• The ICJ’s decisions are binding on states, but it too lacks direct enforcement power. Implementation of its judgments depends on the political will of states, and in some cases, the UN Security Council may be called upon to enforce compliance.

Recent Context

The relevance of both courts is clear from recent global conflicts:

• The ICJ is currently hearing a case accusing Israel of genocide in Gaza. While its rulings are binding, the real test lies in whether states comply.
• The ICC Prosecutor has applied for arrest warrants against leaders accused of crimes in the same conflict, highlighting its role in holding individuals accountable.

Together, these developments show how the ICJ and ICC function complementarily — the ICJ focuses on state accountability, while the ICC ensures individual accountability.

Conclusion

The International Court of Justice (ICJ) and the International Criminal Court (ICC) are two of the most important institutions in international law, yet their roles are fundamentally different.

• The ICJ is a civil court that deals with disputes between states and gives advisory opinions.
• The ICC is a criminal court that prosecutes individuals for serious crimes.

Both courts face challenges, particularly in terms of enforcement and political influence, but they remain vital to the international legal order. Together, they embody the principle that both states and individuals can be held accountable under international law.