This book explores how, why, and when civil society collaborates with different actors in society as well as how such collaboration can be improved. To set the scene, this introductory chapter highlights the main ideas and concepts of the book, including the rationale for civil society to collaborate as well as the rationale for key and supporting actors, such as other nonprofit organizations, public institutions, and private businesses, that are involved when civil society collaborates. The chapter also describes different types of collaborations that civil society may engage in. Finally, it provides an overview of the chapters, themes, and insights that this book offers.