Geoffrey Heal, Donald Waite C. Professor of Social Enterprise at Columbia Business School, is noted for contributions to economic theory and environmental economics. Author of eighteen books and over two hundred articles, he is a Member of the National Academy of Sciences, a Fellow of the Econometric Society, Past President of the Association of Environmental and Resource Economists, recipient of its prize for publications of enduring quality and a Life Fellow and a Director of the Union of Concerned Scientists. Recent books include Nature and the Marketplace, Valuing the Future, When Principles Pay and Endangered Economies: How the Neglect of Nature Threatens our Prosperity. He chaired a committee of the National Academy of Sciences on valuing ecosystem services, was a Commissioner of the Pew Oceans Commission, was a coordinating lead author of the IPCC’s Fifth Assessment Report, and co-founded and Chairs the Board of the Coalition for Rainforest Nations. He has been a principal in two start-up companies.