The USGCRP is responsible for coordinating the global change science that is the foundation for a broad range of decisions about managing the risks and opportunities that global change presents to the nation. As the program has matured, it has found that its original group of collaborating agencies is not adequate for addressing the breadth of the challenges that the United States faces, and hence additional partnerships are needed to address all of the goals and objectives described in the Program’s Strategic Plan. The USGCRP already has a variety of mechanisms and levels of participation that can serve as useful models for enhancing collaboration across the family of U.S. agencies, and with non-Federal partners. In order to achieve its potential, those mechanisms should be more fully employed so as to provide greater societal benefit from the conduct of global change science. The Committee suggests that the responsibility to argue for particular new partnerships where the benefits to the nation outweigh the costs to the individual agencies lies with USGCRP.