This book argues that the theory of sustainable development lost some of its rigor because of two main reasons. The first manifests itself as an inflation of concepts that hampers the correct understanding of sustainability’s essence. The second one consists of a departure from the traditional scientific sources of the classicists and, in part, neoclassicists. Exploiting relevant areas of their works, the authors outline the theoretical framework necessary to promote a healthy version of sustainability. Of utmost interest prove to be areas such as: the formation process of natural prices...