Between 1993 and 2009, the European Union (EU) legally comprised three pillars. This structure was introduced with the Treaty of Maastricht on 1 November 1993, and was eventually abandoned on 1 December 2009 upon the entry into force of the Treaty of Lisbon, when the EU obtained a consolidated legal personality.
Supranationalism was strongest in the first pillar. Its function generally corresponded at first to the three European Communities (European Coal and Steel Community (ECSC), European Economic Community (EEC) and Euratom) whose organisational structure had already been unified in 1965–67, through the Merger Treaty. Later, through the Treaty of Maastricht the word "Economic" was removed from the EEC, so it became simply the EC. Then with the Treaty of Amsterdam additional areas would be transferred from the third pillar to the first. In 2002, the ECSC (which had a lifetime of 50 years) ceased to exist because the treaty which established it, the Treaty of Paris, had expired.
In the CFSP and PJCCM pillars the powers of the European Parliament, the Commission and European Court of Justice with respect to the Council were significantly limited, without however being altogether eliminated. The balance struck in the first pillar was frequently referred to as the "community method", since it was that used by the European Community.
Pillar I: European Communities (Community integration method)
The pillar structure had its historical origins in the negotiations leading up to the Maastricht Treaty. It was desired to add powers to the Community in the areas of foreign policy, security and defence policy, asylum and immigration policy, criminal co-operation, and judicial co-operation.
However, some member-states opposed the addition of these powers to the Community on the grounds that they were too sensitive to national sovereignty for the community method to be used, and that these matters were better handled intergovernmentally. To the extent that at that time the Community dealt with these matters at all, they were being handled intergovernmentally, principally in European Political Cooperation (EPC).
As a result, these additional matters were not included in the European Community; but were tacked on externally to the European Community in the form of two additional 'pillars'. The first additional pillar (Common Foreign and Security Policy, CFSP) dealt with foreign policy, security and defence issues, while the second additional pillar (JHA, Justice and Home Affairs), dealt with the remainder.
Amendments by the treaty of Amsterdam and the treaty of Nice made the additional pillars increasingly supranational. Most important among these were the transfer of policy on asylum, migration and judicial co-operation in civil matters to the Community pillar, effected by the Amsterdam treaty. Thus the third pillar was renamed Police and Judicial Co-operation in Criminal Matters, or PJCCM. The term Justice and Home Affairs was still used to cover both the third pillar and the transferred areas.
Since the end of World War II, sovereignEuropean countries have entered into treaties and thereby co-operated and harmonised policies (or pooled sovereignty) in an increasing number of areas, in the European integration project or the construction of Europe (French: la construction européenne). The following timeline outlines the legal inception of the European Union (EU)—the principal framework for this unification. The EU inherited many of its present responsibilities from the European Communities (EC), which were founded in the 1950s in the spirit of the Schuman Declaration.
Legend: S: signing F: entry into force T: termination E: expiry de facto supersession Rel. w/ EC/EU framework: de facto inside outside
^ abcdeAlthough not EU treaties per se, these treaties affected the development of the EU defence arm, a main part of the CFSP. The Franco-British alliance established by the Dunkirk Treaty was de facto superseded by WU. The CFSP pillar was bolstered by some of the security structures that had been established within the remit of the 1955 Modified Brussels Treaty (MBT). The Brussels Treaty was terminated in 2011, consequently dissolving the WEU, as the mutual defence clause that the Lisbon Treaty provided for EU was considered to render the WEU superfluous. The EU thus de facto superseded the WEU.
^Between the EU's founding in 1993 and consolidation in 2009, the union consisted of three pillars, the first of which were the European Communities. The other two pillars consisted of additional areas of cooperation that had been added to the EU's remit.
In a speech before the Nice Conference, Joschka Fischer, then Foreign Minister of Germany, called for a simplification of the European Union. One of these core ideas was to abolish the pillar structure, and replace it with a merged legal personality for the Union. This idea was included in the Treaty of Lisbon, which entered into force on 1 December 2009. With a legal personality, Union is, for instance, able to be part of international treaties. The Treaty of Lisbon also states that "the Union shall replace and succeed the European Community," with the effect that, once the Treaty entered into force, the EU obtained the membership of the World Trade Organization (WTO) which had belonged to the European Communities pillar.
The abolition of the "3-pillar structure" was welcomed by practitioners and academics who had long considered the 'pillar metaphor" to be unrealistic, if not absurd. The idea that one pillar could be the Communities, while the other two were merely "policies" or "cooperation" was scarcely credible.
In the Lisbon Treaty the distribution of competences in various policy areas between Member States and the Union was reorganised into the following scheme:
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