Gilberto Carlos Gallopín has had a long international career as a sustainability scientist, scenario builder, and systems analyst. He has worked for the UN Economic Commission for Latin America and the Caribbean, the Stockholm Environment Institute, the International Institute for Sustainable Development, the International Institute for Applied Systems Analysis, and the Fundación Bariloche, Argentina. From 1995 to 2002, he served as Co-coordinator of the Global Scenario Group, the international and interdisciplinary forerunner of GTI.