Global partnerships have transformed international institutions by creating platforms for direct collaboration with NGOs, foundations, companies and local actors. They introduce a model of governance that is decentralized, networked and voluntary, and which melds public purpose with private practice. How can we account for such substantial institutional change in a system made by states and for states? Governance Entrepreneurs examines the rise and outcomes of global partnerships across multiple policy domains: human rights, health, environment, sustainable development and children. It argues that international organizations have played a central role as entrepreneurs of such governance innovation in coalition with pro-active states and non-state actors, yet this entrepreneurship is risky and success is not assured. This is the first study to leverage comprehensive quantitative and qualitative analysis that illuminates the variable politics and outcomes of public-private partnerships across multilateral institutions, including the UN Secretariat, the World Bank, United Nations Environment Programme (UNEP), the World Health Organization (WHO) and the United Nations Children's Fund (UNICEF).