This thematic issue sprung from a desire to encourage more dialogue across subfields in the study of politics and governance on how we understand the emerging practices of global governance. Shifts in global power, the emergence of new organizations and regimes and the ever-increasing complexity of interstate cooperation have all contributed to increased interest in "governance" and the role supranational organizations play in managing globalization, regionalization and regional integration. They have also contributed to increased theoretical diversity in how "governance" should be studied. While international politics scholars, drawing on constructivist literature, have placed considerable emphasis on the development and diffusion of norms; others have drawn on the insights of comparative politics, public policy and political economy to study similar issues. While the legacy of older disciplinary boundaries continues to isolate new theoretical developments, it is clearly the case that there is a high degree of complementarity in the study of governance, particularly in the emphasis on "norms" or "ideas" and their level of institutionalization.