Drawing on a wealth of expertise from an international team of contributors, the second edition of International Relations Theory presents a diverse selection of theoretical positions, from historically dominant traditions through to powerful critical voices since the 1980s. Each chapter explains the theoretical background to the position taken, and outlines how and why the theories are relevant. Students are encouraged to analyse and debate the issues presented in the text before deciding which of the theories they believe to be most useful when explaining and understanding international relations. The text is accompanied by an Online Resource Centre providing additional resources for lecturers and students.One of the best collections of essays on international relations theory currently available. Strongly recommended. Michael N. Barnett, University of Minnesota, USA.