Introduction --
Approaches to international security --
Major issues for twenty-first-century security --
Challenges and opportunities for twenty-first-century security --
Twenty-first-century international security actors.

This Oxford Handbook is the definitive volume on the state of international security and the academic field of security studies. It provides a tour of the most innovative and exciting news areas of research as well as major developments in established lines of inquiry. It presents a comprehensive portrait of an exciting field, with a distinctively forward-looking theme, focusing on the question: what does it mean to think about the future of international security?