Chapters feature case studies of the Greek party Syriza, the Spanish Podemos, the German Die Linke, Jean-Luc Mélenchon and France Insoumise, the Dutch Socialist Party and the Slovenian Levica. Jeremy Corbyn’s leadership of Labour in the UK and ‘Momentum’, the movement that supports him is also examined. A separate chapter is devoted to recent grassroots social movements that can be seen as instances of progressive populism, such as the ‘squares movement’ in Spain and Greece. This book fills a crucial gap in the literature on radical left politics and populism in Europe, contributing to the rapidly burgeoning field of populism studies.