After a history of funding environmentally costly megaprojects, the World Bank now claims that it is trying to become a leading force for sustainable development. For more than a decade, nongovernmental organizations (NGOs) and grassroots movements have formed transnational coalitions to reform...

Leaders of organizations in the social sector are under growing pressure to demonstrate their impacts on pressing societal problems such as global poverty. We review the debates around performance and impact, drawing on three literatures: strategic philanthropy, nonprofit management, and...