Not one of the 19 articles of the 1948 Genocide Convention states a defence, an exception, a justification or a circumstance precluding wrongfulness, and the right of self-defence is not in that treaty at all. The Charter of the United Nations states it instead, at Article 51, and names exactly one body, the Security Council, and no court. The single place self-defence enters international criminal law is Article 31(1)(c) of the 1998 Rome Statute, a personal ground whose property limb reaches war crimes alone and which provides that involvement in a defensive military operation “shall not in itself constitute a ground for excluding criminal responsibility.” The instruments answer different questions, and each says so in its own words.
Key Findings
- The Convention on the Prevention and Punishment of the Crime of Genocide states the crime across 19 articles and none states a defence, an exception or a justification. Article IV states the opposite, that persons committing genocide “shall be punished, whether they are constitutionally responsible rulers, public officials or private individuals.”
- The Charter of the United Nations states the right of self-defence at Article 51 and names one body, the Security Council, a political organ, and no court. It addresses recourse to force and states nothing about conduct once force is used.
- The Rome Statute states four grounds for excluding criminal responsibility at Article 31(1), of which self-defence is one. Its property limb is confined to war crimes, and the subparagraph closes by providing that involvement in a defensive operation is not in itself a ground for exclusion.
- The Gaza Strip Rapid Damage and Needs Assessment records US$35.2 billion in physical infrastructure damages and 371,888 housing units destroyed or damaged, October 2023 to October 2025, published jointly by the World Bank, the European Union and the United Nations in 2026. Article II(c) turns on whether conditions of life were “calculated” to bring about destruction, which a damage assessment does not measure.
- The Arms Export Control Act states self-defence as an enumerated purpose of a transfer and never mentions the law of armed conflict. The Arms Trade Treaty states at Article 6(3) a bar on authorisation where the state knows the arms would be used in genocide, with no self-defence exception.
Does the Genocide Convention contain any defence or justification?
Not one of the 19 articles of the 1948 Genocide Convention states a defence, an exception, a justification or a circumstance precluding wrongfulness. Article II defines the crime as an enumerated act committed with intent to destroy a protected group as such, and Article IV provides that persons committing it are punished whatever office they hold. The absence is the finding.
The instrument is short. Articles I to IX carry the substance; Articles X to XIX are procedural, running from authentic texts to registration. The Genocide Convention states at Article I that the Contracting Parties “confirm that genocide, whether committed in time of peace or in time of war, is a crime under international law which they undertake to prevent and to punish.” That is the only clause mentioning war, and it mentions it to say that the crime exists in both conditions.
Article II defines genocide as any of five acts “committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such”: killing members of the group; causing serious bodily or mental harm; deliberately inflicting conditions of life calculated to bring about the group’s physical destruction in whole or in part; imposing measures intended to prevent births; and forcibly transferring children of the group to another group. Article III adds conspiracy, incitement, attempt and complicity.
Article IV closes the question of status rather than opening one of excuse: persons committing genocide or any of the other acts enumerated in Article III “shall be punished, whether they are constitutionally responsible rulers, public officials or private individuals.” The United Nations General Assembly recorded its approval of the text in resolution 260 A (III) of 9 December 1948, and the Convention entered into force on 12 January 1951.
Articles V to IX are machinery: implementing legislation, trial by a competent national tribunal or an international penal tribunal, a bar on treating genocide as a political crime for extradition, a route for calling on the competent organs of the United Nations, and the clause conferring jurisdiction on the International Court of Justice. None of it excuses anything, and the absence is a fact about the 19 articles rather than a statement about anyone’s conduct.
Which treaty holds the right of self-defence, and what question does it answer?
The Charter of the United Nations states the right at Article 51, in one operative sentence: nothing in the Charter “shall impair the inherent right of individual or collective self-defence if an armed attack occurs against a Member of the United Nations, until the Security Council has taken measures necessary to maintain international peace and security.” It names one body, a political organ, and no court.
The article’s second sentence keeps that routing intact. Measures taken in the exercise of the right “shall be immediately reported to the Security Council and shall not in any way affect the authority and responsibility of the Security Council under the present Charter to take at any time such action as it deems necessary.” The right is framed as an interim one, running until a political organ acts.
The Charter of the United Nations puts the antecedent determination in the same hands. Under Article 39 the Security Council “shall determine the existence of any threat to the peace, breach of the peace, or act of aggression and shall make recommendations, or decide what measures shall be taken in accordance with Articles 41 and 42, to maintain or restore international peace and security.” Between them the two articles set out the whole Charter scheme on the resort to force: an armed attack, an inherent right that survives until the Council acts, and a Council determination.
What Article 51 does not contain is as legible as what it does. It says nothing about civilians, nothing about objects, nothing about the conduct of hostilities once force has been resorted to, and nothing about any protected group. It supplies no test a target must satisfy and no threshold an attack must clear. It answers whether a state may use force at all, a question about the beginning of a war rather than about its conduct, and a claim made under it answers that question and no other.
Is self-defence a defence to an international crime at all?
The Rome Statute states four grounds for excluding criminal responsibility at Article 31(1), and self-defence is the third of them. The Statute then confines it: a person “acts reasonably to defend himself or herself or another person or, in the case of war crimes, property,” so the property limb reaches war crimes alone and never genocide.
The four are mental disease or defect destroying the capacity to appreciate the unlawfulness or nature of the conduct; intoxication with the same effect, unless voluntarily incurred in the circumstances described; self-defence; and duress from a threat of imminent death or serious bodily harm. They attach to a person, in a court whose jurisdiction runs to natural persons.
Subparagraph (c) states the self-defence ground as acting reasonably “to defend himself or herself or another person or, in the case of war crimes, property which is essential for the survival of the person or another person or property which is essential for accomplishing a military mission, against an imminent and unlawful use of force in a manner proportionate to the degree of danger to the person or the other person or property protected.” Every element in that sentence concerns a person facing imminent and unlawful force.
Then comes the clause answering the question directly. The Rome Statute states, closing the same subparagraph, that “the fact that the person was involved in a defensive operation conducted by forces shall not in itself constitute a ground for excluding criminal responsibility under this subparagraph.” The drafters distinguished a personal defensive act from participation in a defensive war, and wrote the distinction into the ground where the confusion would otherwise arise.
Two qualifications travel with that reading. Article 31(2) gives the Court the determination of whether a listed ground applies in a case before it, and Article 31(3) permits the Court at trial to consider a ground outside paragraph 1 “where such a ground is derived from applicable law as set forth in article 21,” so the list of four is not closed for every purpose. What the text does foreclose is the shortest version of the claim, that a defensive operation excuses what is done inside it.
Do the rules of conduct change with the cause of the war?
Geneva Convention I states the answer in one clause, common to all four Conventions of 1949: the High Contracting Parties undertake “to respect and to ensure respect for the present Convention in all circumstances.” Additional Protocol I states the same thing at greater length in its 1977 preamble, applying both instruments “without any adverse distinction based on the nature or origin of the armed conflict.”
“Common Article 1” is a nickname rather than a citation. No instrument bears that name; there are four Article 1s of identical wording, one opening each of the Geneva Conventions of 12 August 1949, and the clause quoted here was read at Geneva Convention I. The first limb, the undertaking to respect the Convention in all circumstances, is the limb used here. The second, the undertaking to ensure respect, is read by some as an obligation owed outward to the conduct of other parties and by others as internal only, and nothing relied on here settles it.
Additional Protocol I records the full clause. Its preamble reaffirms that the Conventions and the Protocol “must be fully applied in all circumstances to all persons who are protected by those instruments, without any adverse distinction based on the nature or origin of the armed conflict or on the causes espoused by or attributed to the Parties to the conflict.” How a war began, on that wording, relates in no way to the rules governing its conduct.
An earlier clause of the same preamble runs the other way, and it is the mirror image of the point. The Parties express their conviction “that nothing in this Protocol or in the Geneva Conventions of 12 August 1949 can be construed as legitimizing or authorizing any act of aggression or any other use of force inconsistent with the Charter of the United Nations.” The conduct instruments disclaim any effect on the lawfulness of the resort to force as plainly as they disclaim any dependence on it. Neither body of rules reaches into the other: compliance with the rules of conduct settles nothing about whether a war was lawfully begun, and the lawfulness of its beginning settles nothing about the rules of conduct.
Which body decides each question, and has either been decided?
The Republic of South Africa states its jurisdictional basis in its 2023 Application in its own words, “pursuant to Article 36 (1) of the Court’s Statute and Article IX of the Genocide Convention,” and the filing names the Rome Statute four times without pleading it as a cause of action. Three instruments name three forums for two different questions.
Article IX is the compromissory clause, and the clause that carried the case to the Court is examined in a separate report rather than re-run here. What matters for this question is narrower. The Application was filed on 29 December 2023, and the Court issued orders on provisional measures on 26 January, 28 March and 24 May 2024. Those are dated steps in proceedings, not the judgment on the merits the pleading asks for.
The Charter of the United Nations routes the other question elsewhere entirely. Under Article 39 the Security Council determines the existence of a threat to the peace, a breach of the peace or an act of aggression, and the Council is a political organ whose output is a recorded vote rather than a judgment. Nothing in Article 39 or Article 51 gives a court a role in that determination, and nothing in Article IX gives the Council a role in the Convention question.
The Rome Statute states the third forum and the third subject. Article 6 reproduces the Convention’s definition of genocide word for word for the purposes of the Statute, and the court it establishes exercises jurisdiction over natural persons rather than over states, so the same five acts appear in two instruments routing them to two different kinds of respondent.
The consequence is the one a plain reading gives. A conclusion about the resort to force, reached in the forum the Charter designates, does not reach an accusation under the Convention, and a conclusion about conduct does not reach the Charter question. The severance holds on the conduct side too, where the inference from a pattern of conduct to genocidal purpose is a separate step with a standard of its own, and a finding that conduct was unlawful is not the same finding as a finding of genocidal purpose.
Does destroyed infrastructure prove the genocide element on its own?
The Gaza Strip Rapid Damage and Needs Assessment records US$35.2 billion in physical infrastructure damages and 371,888 housing units destroyed or damaged between October 2023 and October 2025, published jointly by the World Bank, the European Union and the United Nations in 2026. Article II(c) requires conditions of life “calculated” to bring about physical destruction, and calculation is not the quantity a damage assessment measures.
The assessment states its own method and its own limits. It combines remote sensing with ground-verified data, its estimates are validated by all three co-publishing bodies, and it is an assessment rather than an enumeration. Alongside the damages it records US$22.7 billion in economic and social losses, more than half of hospitals non-functional, and an economy contracting by 84%. It separately estimates recovery and reconstruction needs of US$71.4 billion over the next decade, a forward-looking figure measuring a different object, so the two are reported apart and neither is divided into the other.
Set against Article II(c), the word doing the work is “calculated.” The subparagraph reaches conditions of life deliberately inflicted on the group and calculated to bring about its physical destruction in whole or in part, which is a statement about the purpose behind the conditions rather than about their extent. A physical measurement of what was destroyed establishes the conditions and says nothing about the calculation, and the Gaza Strip Rapid Damage and Needs Assessment records no claim to have measured it.
The same limit runs in the other direction, and that is why the two questions cannot be swapped. A figure for destruction does not establish the element, and it equally does not answer whether the war in which the destruction occurred was lawfully begun, because the resort-to-force question turns on an armed attack and a Council determination rather than on a damage total.
How many instruments does the same destruction sit under?
One physical act sits under 3 instruments carrying 3 different mental elements. Additional Protocol I states at Article 54(2) a prohibition on destroying objects indispensable to survival “for the specific purpose of denying them for their sustenance value.” The Rome Statute states at Article 8(2)(b)(ii) a war crime of attacks intentionally directed against civilian objects. The Genocide Convention states at Article II(c) intent to destroy the group as such.
Article 54(2) is the widest of the three and least demanding about motive. It prohibits attacking, destroying or rendering useless objects indispensable to the survival of the civilian population, naming foodstuffs, crops, livestock, drinking water installations and irrigation works, where done “for the specific purpose of denying them for their sustenance value to the civilian population or to the adverse Party, whatever the motive, whether in order to starve out civilians, to cause them to move away, or for any other motive.” A separate report sets out how Article 54 has been read against the record.
The Rome Statute states a narrower object and a stricter mental element. Article 8(2)(b)(ii) makes it a war crime to intentionally direct “attacks against civilian objects, that is, objects which are not military objectives,” so the prohibited conduct is an attack, the protected object is defined by what it is not, and the required state of mind is intention as to the direction of the attack. Whether a given strike qualifies, and what the records of particular strikes on protected sites establish, is a separate question with its own evidence.
Article II(c) is the narrowest and the most demanding. It requires conditions of life deliberately inflicted on the group and calculated to bring about its physical destruction, and the group, not the object and not the population of an area, is what the intent must be directed at. One demolished water installation can therefore satisfy the first instrument on its face, satisfy or fail the second according to what it was and how it was struck, and leave the third untouched, because the third asks about the destruction of a people rather than of a thing.
Where does a self-defence claim carry legal weight in enacted law?
The Arms Export Control Act states self-defence as an enumerated purpose at section 4, permitting transfer “solely for internal security, for legitimate self-defense” and the listed collective purposes, and it never mentions the law of armed conflict. The Arms Trade Treaty runs the other way, barring an authorisation on knowledge of genocide with no self-defence exception in the clause.
The statute is exhaustive on its face. Section 4, codified at 22 U.S.C. 2754, provides that defence articles and services “shall be sold or leased by the United States Government under this chapter to friendly countries solely for internal security, for legitimate self-defense,” for hindering the proliferation of weapons of mass destruction, to permit participation in regional or collective arrangements consistent with the Charter of the United Nations or in collective measures requested by the United Nations, or to enable foreign military forces in less developed countries to construct public works.
Two features of that sentence are load-bearing. The phrase “consistent with the Charter of the United Nations” attaches to the regional and collective-arrangements clause and not to self-defence, and the Arms Export Control Act states nothing anywhere about international humanitarian law, the Geneva Conventions or civilian harm. A separate report sets out who sets the level of that assistance.
The Arms Trade Treaty, adopted in 2013 and in force since 24 December 2014, is built the other way round. It states at Article 6(3) that a State Party shall not authorize a transfer where it has knowledge at the time of authorization that the arms “would be used in the commission of genocide, crimes against humanity, grave breaches of the Geneva Conventions of 1949, attacks directed against civilian objects or civilians protected as such, or other war crimes.” The clause is an absolute prohibition triggered by knowledge, and the words self-defence appear nowhere in it.
Read together, the two instruments locate the claim precisely. One enacted statute makes self-defence a purpose that authorises a transfer and is silent on conduct; one treaty makes conduct the bar and is silent on purpose. A self-defence claim does work at the authorising end and none at the prohibiting end, which is the division of labour running through the Charter and the Convention.
Methodology and limitations
This report reads instruments and records what each provides. The evidence is of three kinds: treaty texts, read from the instruments themselves rather than from a secondary account; one state party’s own filed pleading; and one joint damage and needs assessment co-published by the World Bank, the European Union and the United Nations.
Five of the eight questions rest on primary instruments carrying no separate analytical source: the Genocide Convention of 1948, the Charter of the United Nations of 1945, the Rome Statute of 1998, Additional Protocol I of 1977 and the Arms Trade Treaty of 2013. Each was read in the published text and the load-bearing clauses are quoted rather than paraphrased. All 19 articles of the Convention were read for the first question, so the absence of an excusing provision is an absence in that text.
Three limits carry into the findings. The Rome Statute states at Article 31(3) that the Court may consider a ground outside paragraph 1 where it is derived from applicable law under Article 21, so the list of four is not closed for every purpose. The second limb of Common Article 1, the undertaking to ensure respect, is contested in scope and nothing here settles it. The Gaza Strip Rapid Damage and Needs Assessment records estimates rather than an enumeration, and its damage total and its needs total measure different objects and are not summed or divided into one another.
Standards of proof differ by forum, which bears on what any one body’s conclusion establishes. Marko Milanovic states, in a post of 18 September 2025 on the European Journal of International Law’s EJIL:Talk! blog that is editorially curated rather than peer-reviewed, that the “only reasonable inference” formulation comes from the jurisprudence of the first modern ad hoc criminal tribunals and that other fact-finders are not bound to apply it. The orders in the pending case are named above with their dates as steps in proceedings.
Conclusion
Does a claim of self-defence answer a charge under the 1948 Genocide Convention? On the face of the instruments it answers a different question. The Genocide Convention states the crime across 19 articles and provides no defence, exception or justification in any of them; the Charter of the United Nations routes the right of self-defence to the Security Council and addresses whether force may be resorted to at all; and where self-defence enters international criminal law, the Rome Statute confines it to a person defending a person and adds a sentence providing that being part of a defensive operation is not in itself a ground for exclusion.
The severance is written in both directions, and the conduct instruments state it about themselves. Geneva Convention I binds the parties in all circumstances, and Additional Protocol I states in its preamble both that the Conventions apply without adverse distinction based on the causes attributed to the parties and that nothing in them legitimises any use of force inconsistent with the Charter. So a conduct finding is not an answer to whether a war was lawfully begun, any more than a self-defence claim is an answer to a charge about conduct. The infrastructure question falls the same way: recorded physical damage meets an element whose operative word is “calculated,” and the identical act sits under three instruments carrying three different mental elements, of which extent alone satisfies none.
Two texts, two forums, two questions, and in public argument they are handed to each other as though interchangeable. A claim under the Charter is offered as a reply to a pleading under the Convention; a figure for what was destroyed is offered as a reply to whether force should have been used at all. Each text then carries a conclusion its drafters put somewhere else, and the reader is left holding an answer to a question nobody asked. Which of the two arguments now in circulation would survive being read back against the article it claims to rest on?
Frequently Asked Questions
What is the difference between the law on going to war and the law on conduct in war?
They are separate rules in separate instruments. The Charter of the United Nations states the resort-to-force rules and places the determination with the Security Council at Article 39. The Geneva Conventions and Additional Protocol I govern conduct, without adverse distinction based on the origin of the conflict.
Does the Genocide Convention apply during an armed conflict?
The Genocide Convention states the answer in its first clause, confirming that genocide is a crime under international law “whether committed in time of peace or in time of war.” It makes no other reference to war and creates no wartime variation in the Article II definition.
Which court hears a genocide case against a state, and which hears one against a person?
Article IX submits disputes between contracting parties, including those on the responsibility of a state, to the International Court of Justice. The Rome Statute states a separate court over natural persons, its Article 6 reproducing the Convention’s definition word for word.
Does the Rome Statute allow a self-defence plea for genocide?
The Rome Statute states the ground at Article 31(1)(c) for defending a person, and confines its property limb to war crimes, so property defence never reaches a genocide charge. The same subparagraph provides that involvement in a defensive operation conducted by forces is not in itself a ground for exclusion.
What does Article 54 of Additional Protocol I protect?
Additional Protocol I states the protection for objects indispensable to the survival of the civilian population, naming foodstuffs, crops, livestock, drinking water installations and irrigation works. Article 54(1) separately prohibits starvation of civilians as a method of warfare.
Does an armed attack have to occur before Article 51 applies?
The clause is written that way. The Charter of the United Nations states the right as arising “if an armed attack occurs against a Member of the United Nations,” and requires that measures taken in its exercise be reported immediately to the Security Council.
What does the Arms Trade Treaty require before a transfer is authorised?
The Arms Trade Treaty states three absolute prohibitions at Article 6, including the knowledge-based bar at Article 6(3), and a separate export assessment at Article 7. Under Article 7(3), where the exporting state determines there is an overriding risk of the consequences at Article 7(1), it “shall not authorize the export.”
Is a damage assessment the same thing as an enumeration?
No. The Gaza Strip Rapid Damage and Needs Assessment records estimates built by combining remote sensing with ground-verified data and validated by its three co-publishers, a different operation from counting each damaged structure. Its needs figure is forward-looking and measures a different object again.
Sources
- Arms Trade Treaty, 2013. Articles 6 and 7, adopted by resolution 67/234 B and in force from 24 December 2014. thearmstradetreaty.org. Treaty text.
- Charter of the United Nations, 1945. Articles 39 and 51. un.org. Treaty text.
- Convention on the Prevention and Punishment of the Crime of Genocide, 1948. Articles I to XIX. un.org. Treaty text.
- Geneva Convention (I) for the Amelioration of the Condition of the Wounded and Sick in Armed Forces in the Field, 1949. Article 1, common to all four Conventions. Treaty text.
- Milanovic, Marko, 2025. Proving Genocide. EJIL:Talk!, the blog of the European Journal of International Law, 18 September 2025. ejiltalk.org. Named-author academic law blog commentary, editorially curated, not peer-reviewed.
- Protocol Additional to the Geneva Conventions of 12 August 1949 (Additional Protocol I), 1977. Preamble and Article 54. Treaty text.
- Republic of South Africa, 2023. Application instituting proceedings and Request for the indication of provisional measures, South Africa v. Israel, filed 29 December 2023. General List No. 192. Official record (a state party’s own pleading).
- Rome Statute of the International Criminal Court, 1998. Articles 6, 8 and 31. Treaty text.
- United Nations General Assembly, 1948. Resolution 260 A (III) of 9 December 1948, approving the Convention on the Prevention and Punishment of the Crime of Genocide. Official record (adopted resolution).
- United States Congress, 1968, as amended. Arms Export Control Act, sections 3 and 4 (22 U.S.C. 2753 and 2754). uscode.house.gov. Official record (enacted statute).
- World Bank, European Union and United Nations, 2026. Gaza Strip Rapid Damage and Needs Assessment, April 2026. thedocs.worldbank.org. Joint intergovernmental assessment (co-published).