The practice of a states-system / Maurice Keens-Soper -- Legitimacy in a states-system : Vattel's Law of nations / Peter F. Butler -- Patterns of thought and practice : Martin Wight's 'international theory' / Brian Porter -- The political theorists and international theory / Michael Donelan -- The problem of meaning in international thought / Moorehead Wright -- Knowledge, the state and the state of nature / Cornelia Navari -- International society and international theory / James Mayall -- Justice in international relations / Christopher Brewin -- Obligation and the understanding of international relations / Barrie Paskins -- The justification of the state / Philip Windsor -- International relations and philosophy of history / Peter Savigear -- Schools of thought in international relations / Stephen George.