Knowledge networks are a recent innovation in global environmental governance. They provide a means for local and regional initiatives aimed at averting, mitigating, or adapting to climate change and other trans-boundary problems to join together in a system that: permits sharing of experiences, diffuses policy innovation across national borders, and spans divergent disciplinary boundaries so as to better communicate science to local decision-makers. We consider the role currently played by networks and the possibility that, over time, their soft power characteristics – a reliance on value change and policy emulation – may eventually place them in a position to globally coordinate local and regional environmental policy innovations. If successful, their efforts might supplant the need for national action to address climate change, even if they do not replace the nation-state system whose environmental management efforts will continue to rely on hard power: the use, primarily, of economic incentives to induce policy change. “ICLEI provides technical consulting, training, and information services to build capacity, share knowledge, and support local government in the implementation of sustainable development at the local level. Our basic premise is that locally designed initiatives can provide an effective and cost-efficient way to achieve local, national, and global sustainability objectives.” – International Council of Local Environmental Initiatives – website, 2010 “When California passed its global warming law two years ago, we were out there on an island, so we started forming partnerships everywhere we could. We teamed up with Great Britain, the Canadian provinces, and the Western and Northeastern states and with states like those of my co hosts – Illinois, Florida, Kansas, Wisconsin and more. And right here, for the first time, we have officials from China, India, Mexico, Brazil, and Indonesia and across the world in the same summit, working toward the same goal of reducing greenhouse gas emissions and growing green economies in our own backyards.” – Governor Arnold Schwarzenegger. Global Climate Summit. Los Angeles, California. November 18, 2008.