Security Council

The Security Council is the United Nations organ responsible for maintaining international peace and security, with the power to impose sanctions and authorize military action. Its five permanent members (US, UK, France, Russia, China) hold veto power, a deliberate fix for the League of Nations' weakness.

Verified for the 2027 AP World History: Modern examLast updated June 2026

What is the Security Council?

The Security Council is the part of the United Nations with real teeth. While other UN bodies debate and recommend, the Security Council can make decisions that member states are legally obligated to follow. That includes imposing economic sanctions, authorizing peacekeeping missions, and even approving military force.

Its structure is the part you need to know for AP World. Five permanent members (the United States, the United Kingdom, France, Russia, and China) each hold veto power, meaning any one of them can block a resolution single-handedly. This wasn't an accident. The League of Nations failed partly because the great powers either weren't members or had no special incentive to stay engaged. The UN's founders in 1945 gave the victorious World War II powers permanent seats and vetoes so they would actually participate rather than walk away. The Security Council is a textbook example of the new international organizations described in Topic 9.8, formed with the stated goal of maintaining world peace and facilitating cooperation among states.

Why the Security Council matters in AP World

The Security Council lives in Unit 9: Globalization, 1900-Present, specifically Topic 9.8: Institutions Developing in a Globalized World. It directly supports learning objective 9.8.A, which asks you to explain how and why globalization changed international interactions among states. The essential knowledge here is that new international organizations, including the United Nations, formed with the stated goal of maintaining world peace and facilitating international cooperation. The Security Council is the clearest evidence for that claim, because it's where the UN's peace-keeping mission gets actual enforcement power. It also connects to the Governance theme across the whole course. After two world wars, states experimented with pooling some of their sovereignty into international bodies, and the Security Council shows both the promise of that experiment and its limits (Cold War vetoes routinely froze it).

How the Security Council connects across the course

United Nations (Unit 9)

The Security Council is one of six principal UN organs, and it's the one with binding authority. If the UN is the whole machine for international cooperation, the Security Council is its enforcement arm. Always name the UN as the parent organization when you use this term.

Veto Power (Unit 9)

Each of the five permanent members can kill any resolution alone. This was designed to keep great powers inside the system, unlike the League of Nations, but it also means the Council deadlocks whenever the big five disagree.

Peacekeeping Operations (Unit 9)

When the Security Council authorizes action short of full war, it often deploys peacekeeping forces. These missions are the visible, on-the-ground result of Security Council resolutions and great evidence for how international institutions actually operate.

The Cold War (Units 8-9)

The US and USSR both held permanent seats and vetoes, so superpower rivalry frequently paralyzed the Council from 1945 into the 1990s. The Security Council is a perfect example of how Cold War tensions shaped the new international order.

Is the Security Council on the AP World exam?

On the AP World exam, the Security Council shows up almost entirely through Topic 9.8 and learning objective 9.8.A. Multiple-choice questions test three things. First, structure, like identifying which five countries hold permanent seats (US, UK, France, Russia, China). Second, purpose, like recognizing the Security Council as the UN body responsible for maintaining peace. Third, and most importantly, reasoning, like explaining why the Council was built with permanent veto-holding members when its predecessor, the League of Nations, had no such design. No released FRQ has used the term verbatim, but it works well as evidence in an LEQ or DBQ about how states cooperated (or failed to) after 1945, or about changes in global governance in the 20th century. Don't just name it. Explain what it does and why it was designed that way.

The Security Council vs General Assembly

Both are UN organs, but they do very different jobs. The General Assembly includes every member state, each with one equal vote, and its resolutions are mostly recommendations. The Security Council is small, gives five permanent members veto power, and is the only body whose decisions bind member states. If an exam question asks which UN body is responsible for maintaining peace and can enforce its decisions, the answer is the Security Council, not the General Assembly.

Key things to remember about the Security Council

  • The Security Council is the United Nations organ responsible for maintaining international peace and security, and its decisions are binding on member states.

  • Its five permanent members are the United States, the United Kingdom, France, Russia, and China, and each one holds veto power over resolutions.

  • The veto system was a deliberate response to the League of Nations' failure, designed to keep great powers invested in the organization instead of abandoning it.

  • The Security Council can impose sanctions, authorize peacekeeping operations, and approve military action, which makes it the UN's enforcement arm.

  • During the Cold War, US and Soviet vetoes often paralyzed the Council, showing the limits of international cooperation among rival superpowers.

  • For AP World, the Security Council is evidence for learning objective 9.8.A on how globalization changed international interactions among states.

Frequently asked questions about the Security Council

What is the UN Security Council and what does it do?

It's the United Nations body charged with maintaining international peace and security. Unlike most UN organs, its decisions are binding, and it can impose sanctions, send peacekeeping forces, and authorize military action.

Which five countries are permanent members of the Security Council?

The United States, the United Kingdom, France, Russia (originally the USSR), and China. These were the major Allied powers after World War II, and each holds veto power. AP multiple-choice questions sometimes test whether you can identify which country is NOT one of the five.

Can the Security Council actually force countries to do things?

Yes, on paper. Security Council resolutions are binding on all UN member states, and it can back them with sanctions or military authorization. In practice, a veto from any permanent member blocks action, which is why the Council was often frozen during the Cold War.

How is the Security Council different from the General Assembly?

The General Assembly includes all member states with equal votes and mostly passes non-binding recommendations. The Security Council is small, gives five permanent members vetoes, and issues binding decisions on peace and security. Only the Security Council can authorize sanctions or military force.

Why does the Security Council have veto power when the League of Nations didn't?

The League of Nations collapsed partly because great powers like the US never joined or didn't stay committed. In 1945, the UN's founders gave the major World War II victors permanent seats and vetoes so they'd have a built-in reason to participate. This design choice is exactly what AP questions on Topic 9.8 ask you to explain.