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.

Optimum Currency Area (OCA) theory states a union works when members have synchronized cycles, labour mobility, and fiscal transfers. The eurozone had none robustly, creating an incomplete currency union: $\text{Shared currency} - \text{fiscal union} = \text{vulnerability to asymmetric shocks}$.

The Euro Crisis & Design

The 2010–2012 euro crisis exposed the design flaw. Peripheral states could not devalue to regain competitiveness and faced bond panics alone.

The response: Draghi's whatever it takes (2012), the European Stability Mechanism (ESM), conditional bailouts, and banking union stabilised the system.

Common pitfall: Reading the euro as purely economic. Each step traded sovereignty for interdependence by design, woven economies do not go to war.