Charter of the United Nations

Introduction

The Charter of the United Nations is the founding treaty of the United Nations, signed in San Francisco on 26 June 1945 and entering into force on 24 October 1945. It is the principal constitutional instrument of the international legal order, establishing the purposes, principles, and institutional framework of the Organization. With 193 states parties, the Charter is binding on virtually every state in the world. The Charter emerged from the ashes of World War II, reflecting the determination of the Allied powers to create a more effective international organization than the League of Nations, which had failed to prevent the war.

Purposes and Principles

Article 1 of the Charter sets out four purposes: to maintain international peace and security; to develop friendly relations among nations based on respect for equal rights and self-determination; to achieve international cooperation in solving economic, social, cultural, and humanitarian problems; and to harmonize the actions of nations in achieving these common ends. Article 2 enumerates the principles governing the Organization and its members: sovereign equality of all members, good faith fulfillment of obligations, peaceful settlement of disputes, prohibition of the threat or use of force against the territorial integrity or political independence of any state, assistance to the UN in its actions, and non-intervention in matters essentially within the domestic jurisdiction of any state (domaine réservé). These principles form the constitutional framework of the international legal order.

The Principal Organs

The Charter establishes six principal organs. The General Assembly is the deliberative body where each member state has one vote, with competence to discuss any matter within the scope of the Charter. The Security Council bears primary responsibility for international peace and security, with five permanent members (China, France, Russia, the United Kingdom, and the United States) holding veto power over substantive decisions. The International Court of Justice is the principal judicial organ, settling legal disputes between states. The Secretariat provides administrative support under the Secretary-General, who serves as the chief administrative officer. The Economic and Social Council coordinates the economic and social work of the UN and its specialized agencies. The Trusteeship Council, now inactive, oversaw trust territories until their independence.

The Prohibition on the Use of Force

Article 2(4) of the Charter is the cornerstone of modern international law: “All Members shall refrain in their international relations from the threat or use of force against the territorial integrity or political independence of any state, or in any other manner inconsistent with the Purposes of the United Nations.” This prohibition is a peremptory norm (jus cogens) from which no derogation is permitted. The Charter provides two exceptions: self-defense under Article 51 (the inherent right of individual or collective self-defense against armed attack, until the Security Council takes measures) and Security Council authorization under Chapter VII to maintain or restore international peace and security.

Chapter VII: Collective Security

Chapter VII (Articles 39–51) empowers the Security Council to determine threats to peace, breaches of peace, and acts of aggression, and to authorize measures including economic sanctions and military action. Article 41 authorizes non-military measures (complete or partial interruption of economic relations, severance of diplomatic relations). Article 42 allows the Council to “take such action by air, sea, or land forces as may be necessary to maintain or restore international peace and security.” The Council’s powers under Chapter VII are binding on all member states by virtue of Article 25. The Charter’s collective security system has been invoked in Korea (1950, authorized under Chapter VII after the Soviet Union’s boycott), Iraq (1990, after the invasion of Kuwait), Libya (2011, Resolution 1973 authorizing protection of civilians), and numerous peacekeeping and sanctions regimes.

Human Rights and the Charter

Although the Charter is primarily focused on international peace and security, it also established the foundation for international human rights law. The Preamble reaffirms “faith in fundamental human rights, in the dignity and worth of the human person, in the equal rights of men and women and of nations large and small.” Article 1 lists promoting respect for human rights among the UN’s purposes. Article 55 commits the UN to promote “universal respect for, and observance of, human rights and fundamental freedoms for all without distinction as to race, sex, language, or religion.” Article 68 authorized the Economic and Social Council to establish the Human Rights Commission (which later drafted the Universal Declaration of Human Rights, the International Covenant on Civil and Political Rights, and the International Covenant on Economic, Social and Cultural Rights). The modern Human Rights Council (established in 2006) continues this work, conducting the Universal Periodic Review of all member states’ human rights records.

Peacekeeping and the Uniting for Peace Resolution

Peacekeeping operations are not explicitly mentioned in the Charter but have become a central UN activity. They were developed during the Cold War as a means of containing conflicts through the consent-based deployment of neutral forces. The Uniting for Peace resolution (1950) allows the General Assembly to recommend collective action when the Security Council is paralyzed by veto. It has been invoked in situations including the Korean War, the Suez Crisis (1956), and the Russian vetoes on Syria. The development of peacekeeping and the Uniting for Peace resolution illustrate the Charter’s capacity for evolutionary interpretation.

Amendment and Interpretation

The Charter may be amended by a two-thirds vote of the General Assembly and ratification by two-thirds of member states, including all five permanent Security Council members. This stringent requirement has made formal amendment rare—the Charter has been amended only four times (to expand the Security Council and ECOSOC). The Charter’s interpretation has evolved through practice: peacekeeping operations, the broadening of “threats to peace” to include humanitarian crises, terrorism, and piracy, and the development of international criminal tribunals. The International Court of Justice has played a role through advisory opinions on Charter interpretation.

Legacy

The UN Charter is the closest approximation to a constitution for the international community. Its principles—sovereign equality, non-use of force, peaceful settlement of disputes—underpin the entire structure of modern international law. While its limitations are evident in ongoing conflicts and Security Council deadlock, the Charter remains the foundational text of international legal order. Pacta sunt servanda—agreements must be kept—remains its animating principle. The Charter’s vision of a world in which states resolve their disputes peacefully and cooperate to address common challenges continues to inspire the work of the United Nations and the development of international law.