This book draws upon diverse approaches and understandings of sustainability transformations, social transitions and environmental accountabilities. It presents case studies that highlight real-world consequences of changing ideas about how best to achieve effective and durable sustainability transformations and examines how environmental accountabilities and social transitions influence sustainability transformations. Each chapter provides insights regarding how new knowledge and perspectives matter for whether, when, and how people, governments, corporations and international organisations seek and pursue solutions to social-ecological challenges and sustainability dilemmas. It pays sustained attention to whether and how understandings and applications of accountability can improve international sustainability transformations. The chapters presented in this book consider some pressing questions concerning social transitions and environmental accountabilities: how can they contribute to sustainability transformations, how do they influence the scalability of sustainability transformations, and, how can such sustainability transformations become durable?