Nicholas Georgescu-Roegen was described by Paul Samuelson as 'an economist's economist'. This book honors him by discussing his theories on a wide range of issues but particularly on environmental and energy economics. It is a dynamic tribute which extends his work to address the problems the human race will face in the 21st century. The book shows how Georgescu-Roegen constructed nothing less than an almost complete theoretical alternative to neoclassical economics. Although best-known for his later work as an environmentalist and his work on energy and material transformation, Georgescu-Roegen also made seminal contributions to the economic theory of utility and production and is considered to be one of the founders of modern mathematical economics. In this book an internationally acclaimed group of contributors including Joan Martinez-Alier, William H. Miernyk, Herman Daly and Cutler Cleveland present discussions on environmental and energy economics as well as mathematical economics, economic development and peasant economies, and bioeconomics. This book serves as an excellent all-inclusive introduction to the work of one of the great economists of the 20th century. This celebration of the contributions made by Georgescu-Roegen will be of interest to environmental and natural resource economists, as well as social and economic theorists. With a dedication by Wassily Leontief and a foreword by Paul Samuelson.