This book investigates how the process of European integration fundamentally alters the spatial boundaries and political mechanisms of national welfare states. Maurizio Ferrera, a prominent scholar in European social policy, utilizes a comparative political economy framework to examine the tension between supranational market integration and domestic social protection systems. He argues that the European Union exerts a transformative pressure on welfare states, necessitating a reconfiguration of how solidarity is conceptualized and delivered across different territorial levels.

Experts recognize this work as a foundational text for understanding the intersection of European integration and social policy. Scholars frequently cite the author's nuanced approach to the complexities of multi-level governance in the European Union.