---
title: "Regional Blocs I: The EU, ASEAN & the AU Compared"
description: "Compare the EU, ASEAN and the African Union across their founding treaties, institutional design and integration depth, with key contrasts for exam answers."
url: "https://modeldiplomat.com/learn/lessons/exam-global-institutions-regional-blocs-i-eu-asean-au"
---

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Regional blocs I: EU, ASEAN, AU

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# Regional blocs I: EU, ASEAN, AU

A comparative study of the EU, ASEAN and the African Union—their founding treaties, institutional design, integration depth and exam-relevant contrasts.

## The European Union: the deepest experiment in pooled sovereignty

The European Union is the world's only mature **supranational** organisation, meaning member states have transferred defined competences to common institutions whose law overrides national law. Its lineage runs from the **Treaty of Paris (1951)** establishing the European Coal and Steel Community, through the **Treaty of Rome (1957)** creating the European Economic Community and Euratom, to the **Treaty of Maastricht (1992)**, which created the EU itself with its three-pillar structure and the path to monetary union. The **Treaty of Lisbon (2007, in force 1 December 2009)** consolidated this into the Treaty on European Union (TEU) and the Treaty on the Functioning of the EU (TFEU), gave legal personality to the Union and made the Charter of Fundamental Rights binding.

## Institutions and the four freedoms

The core institutions are the **European Commission** (the executive and "guardian of the treaties"), the **Council of the EU** and **European Council** (member-state voice; the European Council sets strategic direction under Art. 15 TEU), the directly elected **European Parliament** (since 1979), the **Court of Justice of the EU** in Luxembourg, and the **European Central Bank** governing the euro. The single market rests on the **four freedoms**: free movement of goods, services, capital and persons. The euro, launched in 1999 (notes and coins 2002), is used by 20 states as of 2023 (Croatia joined 1 January 2023); the Schengen area abolishes internal border controls.

The doctrines of **supremacy** (*Costa v ENEL*, 1964) and **direct effect** (*Van Gend en Loos*, 1963), articulated by the Court of Justice, are what distinguish the EU from every other regional bloc. **Brexit**—triggered under Art. 50 TEU after the June 2016 referendum, with formal exit on 31 January 2020—was the first invocation of the withdrawal clause and remains a high-yield reference point for sovereignty-versus-integration debates.

## Reform and stress tests

The EU has weathered the 2009–12 eurozone sovereign-debt crisis (Greece, the European Stability Mechanism, 2012), the 2015 migration crisis, and Brexit. Its 2021 **NextGenerationEU** recovery instrument (€750bn) marked the first large-scale joint borrowing. Enlargement remains live: the EU has 27 members after Brexit; Ukraine and Moldova received candidate status in June 2022 following Russia's invasion. For comparative purposes, the EU is the benchmark of "deep" integration—a customs union plus single market plus monetary union plus shared foreign-policy ambitions—against which ASEAN and the AU are measured.

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