In 2007, ICLEI-Local Governments for Sustainability, the U.S. Green Building Council, and the Center for American Progress made a Clinton Global Initiative Commitment to Action to create a Green City Index. That same year, they launched the concept for the STAR Community Index at GREENBUILD in Chicago, IL. By 2008, they had established a formal partnership that included the National League of Cities to develop STAR. Their mission: to address the needs of U.S. cities, towns and counties seeking a common framework for sustainability.