Geoffrey Heal is Garrett Professor of Public Policy and Corporate Responsibility and Professor of Economics and Finance at Columbia University’s Graduate School of Business. His research fields include the management of risks by financial markets, the application of mathematical modeling techniques in economic theory, and the interaction between society and its natural resource base. Dr. Heal has been working to formalize and operationalize the concept of sustainability and develop an interdisciplinary group of leading social and biological scientists committed to research on the interface between the biological and social sciences. His recent books include Valuing the Future, Nature and the Marketplace, Topological Social Choice, Sustainability: Dynamics and Uncertainty, and Environmental Markets.