In recent years trade, aid and development have been subjects of renewed political and public debate with the establishment of the World Trade Organisation, the adoption of the Millennium Declaration, increases in aid - albeit from low levels, and a growing recognition that human security for all ultimately requires a world free of poverty. This festschrift for Helen O'Neill, Professor Emeritus of Economics at University College Dublin, examines the theory and practice of development co-operation over the past half century. It discusses key trends in development policy. The distinguished contributors from various disciplines - friends and former colleagues of Helen O'Neill - analyse the links between development policy and other aspects of countries’ external and domestic policies. They highlight how achieving policy coherence in support of international development objectives is not an easy task as conflicting national and international interests exist and policy choices are ultimately determined by political rather than technical agendas. The diversity of analyses and perspectives on globalisation, trade, aid and development running throughout the book is testimony to the continuing importance and relevance of development studies at a critical juncture in international relations. The range of analyses presented will stimulate and challenge readers’ ideas and perspectives on development in a globalising world.