An industry pooled to prevent a war
Institutional European integration is generally dated from 1948, but its defining moment came with the Schuman Declaration of 1950, which proposed pooling French and West German coal and steel production under shared supranational authority. This led to the European Coal and Steel Community’s founding in 1952 among six countries: France, Italy, Belgium, the Netherlands, Luxembourg and West Germany. The 1957 Treaties of Rome broadened cooperation considerably, creating the European Economic Community and the European Atomic Energy Community. Enlargement proceeded in stages, with Denmark, Ireland and the United Kingdom joining in 1973, Greece in 1981, and Spain and Portugal in 1986, before the Maastricht Treaty formally created the European Union in 1993.
Six become a Community
The union’s development is documented almost entirely through its own founding and amending treaties, texts that historians and legal scholars can examine directly for what member states actually agreed to at each stage, rather than relying on secondhand accounts. The Treaty of Paris, the Treaty of Rome, and the Maastricht Treaty each survive as primary legal documents, supplemented by records of the European Court of Justice, whose rulings through the 1960s and 1970s established the principle that European law took direct effect and held supremacy over national law, a foundational legal development traceable through the court’s own judgments.
From coal and steel to a common market
The union’s structure reflects its founding logic more than any single grand design conceived at once: early cooperation focused narrowly on coal and steel, industries essential to waging war, specifically to make renewed conflict between France and Germany materially difficult rather than merely diplomatically discouraged. Successive treaties broadened this into economic and eventually political cooperation as member states judged deeper integration beneficial, a process of gradual accretion rather than a single constitutional moment, which explains why the union today combines economic, legal and political authority built up in layers across more than seven decades rather than established from a single unified plan.
Enlargement in waves
The union’s expansion, particularly the 2004 addition of ten Central and Eastern European states following the Cold War’s end, introduced a genuinely new level of complexity and disagreement among member states over how quickly and how deeply integration should proceed. More recent tensions, including the eurozone crisis, disputes over migration policy, and the United Kingdom’s withdrawal completed in 2020, are generally treated as the practical costs of an increasingly large and diverse membership rather than as evidence that the underlying integration project has failed, though how to weigh those tensions against the union’s stated achievements remains a live and unresolved argument.
A treaty that created the Union itself
By the early twenty-first century the union had grown to twenty-seven member states, representing roughly a sixth of global economic output, and in 2012 it received the Nobel Peace Prize in recognition of its role in advancing peace, democracy and human rights among countries that had fought each other repeatedly in prior centuries. The 1999 launch of the euro, with physical currency entering circulation in 2002, marked one of the union’s deepest forms of integration among participating states, binding monetary policy across borders in a way well beyond what the original coal and steel arrangement had envisioned.
A union tested by its own success
This is a solid account of the institutional mechanics behind an unusually gradual and treaty-driven process of political integration, and it is particularly good at keeping the original war-prevention rationale visible rather than letting it fade into a purely economic story. It rewards readers who want the sequence of treaties laid out clearly. It moves quickly, though, over the internal politics behind more recent strains, including Brexit, treating them as outcomes rather than examining the domestic debates that produced them in any depth. Readers wanting that closer domestic political detail, rather than the institutional treaty history that dominates here, will need a more focused account of any single member state’s internal debate.
