When we speak of global governance today, we no longer mean simply state-to-state diplomacy, international treaties, or intergovernmental organizations like the United Nations. Alongside these 'traditional' elements of global politics are a host of new institutions ranging from global networks of governmental officials, to private codes of conduct for corporations, to action-oriented partnerships of NGOs, governments, corporations, and other actors. These innovative mechanisms offer intriguing solutions to pressing transnational challenges as diverse as climate change, financial governance,...