On 25 March 1957, the Heads of State and Government of Belgium, Germany, France, Italy, Luxembourg and the Netherlands signed the Treaty on the European Economic Community (EEC) and the Treaty on the European Atomic Energy Community (EAEC). They thus created the basis for the economic integration of the participating states.

The core element of the EEC was the common market, which includes the so-called four freedoms: the freedom of movement for workers and the free movement of goods, services and capital. As early as mid-1968, and a year and a half earlier than foreseen, the Member States had abolished tariffs and restrictions on trade and established a common external tariff. The EEC had thus become a customs union.

Already five years before the Treaty of Rome, on 23 July 1952, the Treaty on the European Coal and Steel Community (ECSC) entered into force. The ECSC had a clear goal: By placing the most important and strategic economic areas at that time under common supervision, a war between Germany and France was to be made impossible.

While economic integration progressed steadily, a major political integration attempt in the French National Assembly in 1954 failed: the European Defense Community (EDC).

Currently, however, it seems to be high time to work together more closely in security and defense policy. Terrorist threats make the world more insecure, and with regards to the US many ask themselves how and possibly if the United States will continue to defend the Western world and its democratic values.

From an economic point of view, a common European security and defense policy would make sense anyway: as a so-called public good, all Europeans would benefit from it. This added value could be financed from a common budget.

The project could be successful even if not all states would be involved. The EU treaty offers the possibility for a group of countries to move forward. The citizens of the European Union are already advocating a common defense and security policy (Figure) by a considerable majority.