[HS] HƯỚNG DẪN ÔN TẬP GIỮA HỌC KÌ I SỬ 12 2026-2027(1)_1

Understanding the United Nations: History, Formation, and Core Principles

The United Nations (UN) stands as the most influential international organization dedicated to maintaining global peace, fostering cooperation, and promoting human rights. This course unpacks the historical backdrop that led to its creation, the pivotal conferences that shaped its charter, and the fundamental principles that guide its operations today. By the end of this module, learners will be able to answer key quiz questions confidently and appreciate the UN’s role in contemporary international affairs.

1. Historical Context: The World Before the UN

To grasp why the United Nations was established, it is essential to examine the global environment of the early 1940s. The world was emerging from the devastation of World War II, a conflict that had reshaped borders, economies, and societies.

• World War II’s final phase: By late 1944 and early 1945, the Allied powers were advancing on multiple fronts, and the Axis powers were in retreat. The war’s end was imminent, creating a power vacuum that demanded a new framework for international cooperation.
• Desire for lasting peace: The horrors of the war underscored the need for a permanent organization that could prevent future large‑scale conflicts.
• Failure of the League of Nations: The interwar League had proved ineffective in curbing aggression, prompting leaders to design a more robust institution.

These factors collectively set the stage for the United Nations’ birth.

2. Key Conferences Leading to the UN Charter

Three major gatherings were instrumental in shaping the UN:

• Washington Conference (1941‑1942): Allied nations discussed post‑war security structures, laying early ideas for a global body.
• Yalta Conference (February 1945): The “Big Three” – the United States, the United Kingdom, and the Soviet Union – agreed on the need for a new organization and outlined its basic composition.
• San Francisco Conference (April‑June 1945): Delegates from 50 nations convened to draft and adopt the United Nations Charter, the foundational treaty that defines the UN’s purpose, structure, and guiding principles.

During the San Francisco Conference, the three major powers – the United States, the United Kingdom, and the Soviet Union – formally agreed to establish the United Nations, marking a historic moment of collaboration among former wartime allies.

3. The United Nations Charter: The Core Document

The Charter is the UN’s constitutional document. It outlines:

• Purposes and Principles: Maintaining international peace and security, developing friendly relations among nations, and achieving international cooperation in solving economic, social, cultural, and humanitarian problems.
• Organizational Structure: The General Assembly, the Security Council, the Economic and Social Council, the International Court of Justice, and the Secretariat.
• Member Obligations: Respect for the sovereignty of other states, non‑intervention in internal affairs, and adherence to the principle of peaceful settlement of disputes.

The Charter officially came into force on 24 October 1945, a date now celebrated annually as United Nations Day. This day marks the moment when the majority of the original member states ratified the Charter, giving the organization legal standing on the world stage.

4. Fundamental Principles of UN Operation

Several guiding principles are enshrined in the Charter and continue to shape UN actions:

• Non‑intervention: The UN does not interfere in the domestic affairs of sovereign states, respecting national sovereignty while encouraging peaceful dialogue.
• Peaceful settlement of disputes: Member states are urged to resolve conflicts through negotiation, mediation, arbitration, or judicial settlement.
• Collective security: The Security Council has the authority to take enforcement measures, including sanctions or the use of force, when peace is threatened.
• Promotion of human rights: The UN works to protect fundamental freedoms and dignity for all peoples.

Among these, the principle of non‑intervention in internal affairs is especially prominent, reflecting the organization’s commitment to respecting each nation’s autonomy while fostering international cooperation.

5. Timeline of UN Formation

The United Nations did not emerge overnight. Its formation spanned several crucial years:

1. 1941‑1945: Conceptual groundwork laid during wartime conferences and diplomatic exchanges.
2. April‑June 1945: The San Francisco Conference drafts the Charter.
3. 24 October 1945: The Charter becomes effective after ratification by the majority of signatory states, officially establishing the UN.

This period, from 1941 to 1945, marks the complete evolution from idea to institution.

6. The United Nations Today: Structure and Functions

Understanding the UN’s main bodies helps contextualize its broad mandate:

• General Assembly: All member states meet annually to discuss global issues, adopt resolutions, and set the agenda.
• Security Council: Composed of five permanent members (China, France, Russia, the United Kingdom, and the United States) and ten rotating members, it holds primary responsibility for maintaining international peace and security.
• Economic and Social Council (ECOSOC): Coordinates economic, social, and environmental programs, working closely with specialized agencies like UNESCO and WHO.
• International Court of Justice (ICJ): Provides legal adjudication between states based on international law.
• Secretariat: Led by the Secretary‑General, it administers day‑to‑day operations and implements decisions of the other organs.

These organs collectively enable the UN to address a wide array of challenges, from conflict resolution to sustainable development.

7. Review Questions: Applying What You’ve Learned

Use the following practice questions to test your knowledge. Each question aligns with the quiz items provided earlier.

1. Historical backdrop: The United Nations was created during the final phase of which major global conflict? Answer: World War II’s final stage.
2. Founding conference: Which three nations agreed at the Yalta Conference to establish the UN? Answer: The United States, the United Kingdom, and the Soviet Union.
3. Organizational purpose: Which organization’s primary goal is to maintain international peace and security? Answer: The United Nations.
4. Key date: What significant event occurred on 24 October 1945? Answer: The UN Charter entered into force, marking the official establishment of the United Nations.
5. Charter significance: In which document are the UN’s objectives and principles formally recorded? Answer: The United Nations Charter.
6. Formation period: Between which years did the UN’s formation process take place? Answer: 1941‑1945.
7. Founding moment: Which event officially marked the UN’s creation? Answer: The ratification of the Charter on 24 October 1945.
8. Core principle: Identify a fundamental UN principle that emphasizes respect for national sovereignty. Answer: Non‑intervention in the internal affairs of states.

8. Conclusion: The UN’s Enduring Legacy

The United Nations emerged from the ashes of World War II with a clear mission: to prevent future wars, promote human rights, and foster international cooperation. Its Charter, adopted in 1945, remains the cornerstone of global governance, guiding the organization’s actions across peacekeeping, development, and humanitarian assistance. By understanding the historical context, key milestones, and core principles outlined in this course, learners are better equipped to engage with current UN initiatives and appreciate the enduring relevance of this pivotal institution.