Amory Lovins is chairman and chief scientist of the Rocky Mountain Institute. He has been an influential environemental voice on behalf of a “soft energy path" for the United States and other nations and has advocated energy use and energy-production concepts based on conservation, efficiency, the use of renewable sources of energy, and generation of energy at or near the site where it is actually used. His many books include Winning the Oil Endgame, Natural Capitalism with Hunter Lovins and Paul Hawken, and Factor Four: Doubling Wealth, Halving Energy Use with Hunter Lovins and Ernst Ulrich von Weizsäcker. In the 1990s, his work with the Rocky Mountain Institute included the design of an ultra-efficient automobile, the Hypercar. He was named a MacArthur Fellow in 1993.