This article takes seriously the proposition that ideas and concepts, both good and bad, have an impact on international public policy. It situates the emergence of governance, good governance and global governance, as well as the UN's role in the conceptual process. Although 'governance' is as old as human history, this essay concentrates on the intellectual debates of the 1980s and 1990s but explores such earlier UN-related ideas as decolonisation, localisation and human rights, against which more recent thinking has been played out. A central analytical perspective is the tension between many academics and international practitioners who employ 'governance' to connote a complex set of structures and processes, both public and private, while more popular writers tend to use it synonymously with 'government'.