This book offers a critical and up-to-date reflection on the field of service design, a discipline that is becoming increasingly widespread in both academia and industry. The volume examines the fundamental principles of service design with the aim of deepening our understanding of the context, role, and impact of this practice. Through contributions from a diverse group of scholars and professionals in design and services from around the world, the book brings together experiences and perspectives that demonstrate how service design engages with contemporary global issues, including climate change, social justice, and racial issues. In this sense, the book offers a critical review of the themes and disciplines that are challenging and expanding the field, highlighting its complexity, challenges, and possible future directions, including through practical examples.