European Integration and the Euro

From Coal to Currency

European integration is the most ambitious voluntary pooling of sovereignty in history — driven by the conviction that economic interdependence makes war unthinkable.

The steps:

1. ECSC (1951): France, Germany, Italy, and the Benelux countries pooled coal and steel production — the raw materials of war — under a supranational authority.
2. Treaty of Rome / EEC (1957): a customs union (free internal trade, common external tariff) and the ambition to create a common market.
3. Single European Act (1986): completed the internal market — free movement of goods, services, capital, and people (the four freedoms).
4. Maastricht Treaty (1992): created the EU and laid the path to monetary union. Convergence criteria: inflation, interest rates, deficit, debt, and exchange-rate stability.
5. EMU and the euro (1999/2002): a single currency for (initially) 12 members, managed by the European Central Bank (ECB) in Frankfurt. One monetary policy for all.

Optimum currency area (OCA) theory (Mundell): a currency union works when members have:

• Synchronized business cycles (one-size monetary policy fits all).
• Labour mobility (workers move from depressed to booming regions).
• Fiscal transfers (the centre supports regions in recession).

The eurozone met the first condition partially, the second weakly (language barriers), and the third barely at all. It was, in OCA terms, an incomplete currency union — a shared currency without the fiscal shock absorbers that make it sustainable.

$$\text{Shared currency} - \text{fiscal union} = \text{vulnerability to asymmetric shocks}$$

The euro crisis (2010-2012): the GFC exposed the design flaw. Countries like Greece, Ireland, Spain, and Portugal had borrowed heavily (or had banking sectors that had). Without their own currency, they could not devalue to regain competitiveness; without a common fiscal backstop, they faced bond-market panic alone. Spreads on peripheral bonds exploded; a euro breakup looked possible.

The response: the ECB's "whatever it takes" commitment (Draghi, 2012), the European Stability Mechanism (ESM), conditional bailouts, and eventually banking union (single supervision). These patches stabilised the system but did not resolve the structural tension: a monetary union without political union remains inherently fragile.

The euro is an experiment in progress — economically incomplete by design, politically sustained by the conviction that the alternative (dissolution) would be worse.

The integration ladder

Common pitfall: Reading the euro as purely economic. Each step traded sovereignty for interdependence by design — the project's founding logic is that economies woven together do not go to war.