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Public international law

Public international law governs the relations between states in different fields, such as armed conflict. Learn more what public international law is and how it works.

Principles of public international law

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Sources of international law

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Enforcement of international law

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When does a state violate international law?

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For whose actions is the state responsible?

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Towards whom is a state responsible?

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The sculpture 'Non-Violence' at the UN headquarters in New York.

Violations of international law: What should third states do?

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The silhouette of a soldier patrolling at night. Photo: MONUSCO/Sylvain Liechti

What should a state do if it violates international law?

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A man passes graffiti on a high wall.

International law and self-determination

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A group of children walk through the ruins of Idlib in Syria.

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The International Humanitarian Law Centre promotes respect for the laws of war through independent research, advice, and advocacy worldwide.

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