Over recent years it has become increasingly clear that the European Union is falling short of its promise to enhance social cohesion across the continent. Welfare state modernization has been at the centre of divisive debates over the redistribution of wealth and imbalances between a wealthy European core and its peripheries. Some see the policies and governance of the EU as part of the problem, others rather as the solution. This book examines the key issues facing the EU's social policy-making. Each chapter focuses on a single challenge and explores the arguments and considerations that coalesce around it. The book helps students and researchers alike to understand how the EU operates and shapes social policy on multiple levels, and to better assess the EU's role in supporting social cohesion.