This book presents the state of the art of International Relations theory through an analysis of the work of twelve key contemporary thinkers. The authors break with the usual procedure in the field which juxtaposes aspects of the work of contemporary theorists with others, presenting them as part of a disembodied school of thought or paradigm. A more individual focus can demonstrate instead, the well-rounded character of some of the leading oeuvres and can thus offer a more representative view of the discipline. Each chapter places the thinker in the landscape of the discipine, to identify how they go about studying International Relations, and to discuss what others can learn from them. The twelve theorists are: John Vincent, Kenneth Waltz, Robert O. Keohane, Robert Gilpin, Bertrand Badie, John Ruggie, Hayward Alker, Nicholas G. Onuf, Alexander Wendt, Jean Bethke Elshtain, R.B.J. Walker and James Der Derian.