Dr. Murray Gell-Mann, Robert Andrews Millikan Professor of Theoretical Physics at the California Institute of Technology, won the Nobel Prize in Physics in 1969. As a Director of the J.D. and C.T. MacArthur Foundation and Chairman of its Committee on World Environment and Resources, he has been deeply involved in studies and strategies involving numerous important environmental issues. Included have been deforestation, loss of biological diversity, desertification, soil erosion, global warming, depletion of the ozone layer, air and water pollution, destructive economic development and technology, and population growth. In 1988, Dr. Gell-Mann was listed on the United Nations Environmental Program Roll of Honor for Environmental Achievement (the Global 500). He has been called the “prime mover” of the “Visions of a Sustainable World” conference held at Caltech in 1991. In addition to serving as a member of the Caltech faculty since 1955, he is a Founding Member of the Board of Trustees of the Santa Fe Institute and Co-Chairman of its Science Board.