“In an era when democratic institutions are under great strain, this important volume brings together leading scholars to examine the central constitutional role of trade unions as guarantors of democracy and social justice. The chapters consider the multiple challenges presented by climate change, migration, the erosion of secure employment, the global pandemic, and international trade. The need for strong and democratic trade unions has never been so urgent. This book is a vital scholarly contribution to these debates.” — Alan Bogg, Professor of Labour Law, Bristol University, UK