This book analyses the roots and evolution of the concept of sustainability in Europe and the European Union. As sustainability has always mirrored certain value judgments on justice and priorities, it is suitable for functionalist, analytical, contextual and historical comparisons via multidisciplinary studies combining various branches of the social sciences, law, philosophy, and economics. The aim of this book is to explore the roots and evolution of sustainability, so as to reveal how a European style of sustainability has emerged, one that is inextricably linked to our civilization and history. It identifies linear and cyclical phases with clear trends toward expanding the reach of sustainability, its subjects and their duties. The book offers a multidisciplinary, chronological and contextual overview of the evolution of sustainability until the 21st century, while also addressing its legal regime. Sustainability has many faces and needs to be approached in a dynamic manner through the lens of sustainable development or via a multi-stakeholder model that includes private subjects and corporate social responsibility. Although primarily intended for an audience with an advanced background in law, economics and philosophy, the book will also benefit a more general audience, particularly those who want to learn where the current sustainability concerns and legal regime actually came from.