A walk through the whole topic. What regionalism is, why it has grown, the organisations it has produced, the European Union up close, and the exam questions it all answers.
Most of the world's states now belong to a regional organisation. Some, like the European Union, have built a parliament, a court and a single market. Others, like the United States-Mexico-Canada Agreement, are little more than a trade deal. This walk-through takes the whole of Topic 5 in order: it explains what regionalism is, why states have turned to it, how seven regional organisations compare, what the EU has built that none of the others has, and how all of it is examined. Read it from the top, or use the topic-pack links at the end to revise a single part.
The starting definition, and the four forms the exam expects you to know.
Regionalism is the growth of cooperation, and of institutions, among states that share a geographical area. The spec definition is worth learning closely: the creation and operation of institutions that express a shared identity and shape collective action within a geographical region.
The key distinction running through the whole topic is how far states hand power upwards. Intergovernmentalism is cooperation between states that each keep their sovereign independence; decisions need agreement and any state can refuse. Supranationalism is different: power is given to an authority placed, in theory, above the state, so its decisions can bind members even against their will. When states agree to decide some things jointly through such a body, they are said to use pooled sovereignty.
Regionalism is usually taught in four forms. Most real organisations are a mix, but the strongest answers name the form they are discussing.
Free trade areas, customs unions and single markets. The most common form of modern regionalism: USMCA, Mercosur, the EU single market.
Shared institutions and a common voice in global politics, so smaller states are heard. The EU and the African Union both do this.
Cooperation on defence and shared threats. NATO is the clearest case; the Shanghai Cooperation Organisation began this way.
Protecting a shared regional identity and values, sometimes against a global culture. ASEAN's "Asian values" is the stock example.
The economic and political pressures behind it, and its uneasy relationship with globalisation.
Modern, or "new", regionalism has grown fastest since the early 1990s. Several pressures explain it.
Economic opportunity. A larger shared market brings growth: lower trade barriers, more investment, shared technology. Most EU members have grown more prosperous inside the single market than they expect they would outside it.
Defence against the global economy. For weaker states, a bloc is a shield. Acting together, members can resist the pressure of transnational corporations, soften the policies of the Washington Consensus, and bargain harder at the World Trade Organization than any of them could alone. A regional bloc is a counterweight to the economic superpowers.
A bigger political voice. Politically, regionalism lets smaller states be heard. The EU negotiates at the WTO and the G20 as a unit roughly the size of the United States or China. The Arab League exists, in its own words, to safeguard the independence and interests of Arab states collectively.
Security and shared values. States also group together for security, as the Shanghai Cooperation Organisation did over shared borders and separatism, and to protect common values, as ASEAN does with the "ASEAN Way".
Underneath this sits the deepest theme of the topic: globalisation against state sovereignty. Every time states pool sovereignty in a regional body, they accept limits on their own authority. Whether that is a gain or a loss is the argument behind most of the exam questions in Part 6.
Scroll, and watch the comparison build. Green means deep integration on that measure, amber partial, grey minimal or none.
Five measures, seven organisations. The chart is not one colour, and that is the central point of this topic: a "regional organisation" can be almost anything from a single trade deal to a near-federal union.
The deepest and broadest of all. A single market, the euro, a directly elected Parliament, a supreme court, free movement of people, and a growing security role. The only body that is strongly supranational on almost every measure.
Modelled roughly on the EU. It has an Assembly, a Commission, a Pan-African Parliament, the African Charter on Human and Peoples' Rights and a peacekeeping role. Broad but shallow: it reaches into every measure, but lightly.
Strong on trade through the ASEAN Free Trade Area, but deliberately light on political institutions. The "ASEAN Way" of consensus and non-interference keeps it firmly intergovernmental, the opposite of the EU's approach.
The loosest of the seven. Limited free trade, minimal shared institutions beyond its Council, and only occasional joint action. A political forum more than an integrated bloc.
One green cell, four grey. The United States-Mexico-Canada Agreement, which replaced NAFTA in 2020, is purely economic - a trade agreement with no parliament, no court of its own and no political project.
An economic bloc with real institutions. A customs union with a common external tariff, plus a Council, an executive Group and a consultative Parliament. Deeper than USMCA, narrower than the EU.
The mirror image of USMCA: security-led, not economic. Built to manage shared borders and resist what its members call outside interference in sovereign states.
Regionalism takes whatever form its members want. The EU stands alone in depth; everything else is partial and uneven. When a question says "regional organisations", a strong answer immediately asks which ones, and how deep?
| Econ | Politics | Rights | Movement | Security | |
|---|---|---|---|---|---|
| EUEuropean Union | Deep | Deep |
Deep | Deep |
Part |
| AUAfrican Union | Part | Part |
Part | Part |
Part |
| ASEANSE Asian Nations | Part | Min |
Min | Min |
Min |
| ALArab League | Min | Min |
Min | Min |
Min |
| USMCAUS-Mexico-Canada | Part | None |
None | None |
None |
| MercosurS. Common Market | Deep | Part |
Min | Part |
Min |
| SCOShanghai Coop. | Min | Part |
Min | Min |
Deep |
Tap an organisation for the dates, members and features you can quote in an essay.
Grew out of the European Coal and Steel Community (1951) and the European Economic Community, created by the Treaty of Rome (1957). The Maastricht Treaty (1992) created the EU itself; the Lisbon Treaty (2007) reformed it. It has 27 members after the UK left in 2020.
It is the only deeply supranational bloc: a single market with the "four freedoms" (goods, services, capital, people), a single currency used by most members (the euro), and binding institutions covered in Part 4. Membership requires signing the European Convention on Human Rights.
Launched in 2002, replacing the Organisation of African Unity, and modelled in part on the EU. Its motto is "A united and strong Africa".
It has shared institutions (the Assembly, the Commission and a Pan-African Parliament), the African Continental Free Trade Area, the African Charter on Human and Peoples' Rights, and a peacekeeping role through the African Standby Force and missions such as AMISOM in Somalia. Broad ambitions, but most areas are still developing.
The Association of Southeast Asian Nations. Economically integrated through the ASEAN Free Trade Area, but politically deliberately loose.
The ASEAN Way is the key term: consensus rather than majority voting, non-interference in members' internal affairs, informality, gradualism and mutual respect. This keeps ASEAN firmly intergovernmental and is sometimes linked to "Asian values" and to the criticism of regional egoism.
Founded in 1945 to draw closer the relations between Arab states and to safeguard their independence and sovereignty.
It is the loosest of the seven: limited free trade (efforts towards the Greater Arab Free Trade Area), minimal shared institutions beyond its Council, and mainly political and diplomatic, rather than integrative, action.
The United States-Mexico-Canada Agreement, which replaced NAFTA in 2020. It is mainly an economic organisation: a free trade agreement, not a political project.
Its notable feature is the sunset clause: the agreement must be reviewed periodically by all three nations, which keeps it under constant renegotiation rather than building permanent institutions.
The Southern Common Market, founded by the Treaty of Asuncion (1991). Founding members: Argentina, Brazil, Paraguay and Uruguay. Venezuela joined in 2012 but has been suspended since 2016; Bolivia is in the process of joining.
It operates as a customs union with a common external tariff, and has real institutions: the Common Market Council, the Common Market Group and the consultative Parliament, Parlasur. It has negotiated trade agreements, including with the EU.
Began as the "Shanghai Five" in 1996 (China, Russia, Kazakhstan, Kyrgyzstan, Tajikistan), cooperating on shared borders and security. Uzbekistan joined in 2001, creating the SCO. India and Pakistan later became members.
It is a security and political body. Its members agreed that outside interference in sovereign territory, on the pretext of "humanitarian intervention", was unacceptable - a deliberate counterpoint to the Western idea of a Responsibility to Protect.
The one organisation deep enough to need a section of its own.
The EU is the case study at the heart of the topic, and the question is always how far it has moved from cooperation between states towards a government above them. Its institutions split into two types.
Supranational institutions can act above the member states. The European Commission proposes EU laws, enforces them and prepares the budget; its officials are nominated by member governments but are meant to serve the EU as a whole. The European Parliament is the only directly elected EU body and co-decides most legislation with the Council. The European Court of Justice enforces EU law and settles disputes between members, and its rulings bind national governments.
Intergovernmental institutions keep power with the states. The European Council is the heads of government, meeting several times a year to take the big strategic decisions, such as admitting new members. The Council of the European Union is national ministers, deciding whether to adopt legislation alongside the Parliament.
Widening and deepening. The EU has grown in two directions at once: widening, by expanding membership through successive enlargements, and deepening, by furthering integration into new areas, from the single market to monetary union. What caused this greater integration - shared prosperity, peace after 1945, the pull of a large market - is a standard exam line.
The EU as a global actor. Part 5.4 of the spec asks whether the EU has the power of a major country. It is an economic heavyweight, roughly the size of the United States or China, with real weight at the WTO and in climate negotiations, and a developing security role through the Common Security and Defence Policy. But it has no single army, no single foreign policy it can always enforce, and its members can still pull in different directions. Whether that adds up to a superpower is the question behind several of the essays in Part 6.
What regionalism can and cannot do, and what it costs in sovereignty.
Spec point 5.5 asks how far regionalism addresses contemporary global issues. The honest answer is: unevenly.
On conflict, regional bodies do real work: the AU runs peacekeeping missions, and the EU's security role is growing. But they also struggle where members disagree. On poverty and development, larger markets and shared funds can lift members, though the gains are uneven. On human rights, the EU sets a genuine condition of membership, the AU has its Charter, but ASEAN's declaration is weakly enforced and the SCO actively resists outside human-rights pressure. On the environment, the EU has been a leading voice in climate negotiations, while purely economic blocs do little.
A useful balance to carry into the exam: regionalism makes global governance more manageable, because it is easier to reach agreement among a few blocs than among 190-plus states - but it can also let blocs assert regional interests against global rules, as when the AU has discouraged cooperation with the International Criminal Court.
The questions this topic is examined through, and how the walk-through feeds them.
Paper 3 Global examines this topic as a 12-mark comparative question (Section A) and a 30-mark essay (Q3). These are real recent questions. Tap one for how to use the walk-through to answer it.
Trap: "eroded" - measure how much sovereignty is actually lost, and define pooled sovereignty first. Use the matrix: the EU's binding court and majority voting are the strong "for" case; USMCA, ASEAN and the Arab League, which stay intergovernmental, are the "against" case. Conclude that erosion depends entirely on which bloc you mean.
Trap: define superpower across economic, political, structural and military power. Part 4's "global actor" material is the spine: economically yes, militarily no, politically only when members agree.
Trap: a comparison - regional bodies set against the economic institutions of global governance. Part 5 supplies the regional side; weigh the EU and AU against the global lenders, issue by issue.
Trap: "direct consequence" overstates it. Part 2's tension is the whole answer: regionalism is partly driven by globalisation and partly a defence against it.
Trap: the sovereignty-against-pooling debate again. Use small EU states, which gain a global voice, against the argument that membership constrains national choice.
Approach: a 12-mark comparative answer. Pair the two on shared features - both bring many states into a union with common aims, both began with an economic focus and moved into political and security roles, both built parliaments and courts. The AU detail in Part 3 and the EU material in Part 4 give you the pairs.
Approach: Part 2 is written for this question. Pair economic factors (larger markets, defence against the global economy) with political factors (a bigger voice, shared values), with a named bloc for each.
The vocabulary the examiner expects you to define and use.
Regionalism - creation and operation of institutions that express a shared identity and shape collective action within a geographical region.
European Union - a political and economic union of 27 (formerly 28) member states in Europe.
European integration - the process of industrial, political, legal, economic, social and cultural integration of states in Europe.
Sovereignty - absolute and unlimited power and authority.
Supranationalism - power given to an authority placed, in theory, above the state.
Intergovernmentalism - interaction among states based on sovereign independence.
Pooled sovereignty - states agreeing to take some decisions jointly through a shared body for mutual benefit.
Global actor - an entity that participates in international relations.
Widening and deepening - the process by which the EU has expanded membership while furthering integration.
Qualified majority voting (QMV) - EU voting where a state can be outvoted; a supranational feature.
National veto - a member state's power to block a decision; an intergovernmental feature.
Subsidiarity - the principle that decisions are taken at the lowest effective level.
Federalism - a system in which power is divided between central and regional levels.
Regional egoism - a bloc putting its own regional interests above wider global cooperation.
Regional hegemony - the dominance of one powerful state within a regional bloc.
You have walked the topic. Now check your recall and spec coverage.