The second edition of Contemporary Security Studies builds on the thorough coverage of the first with the inclusion of new chapters. Written by key scholars, the book introduces students to the fast-evolving field of security studies. It covers differing approaches to the study of security; the broadening and deepening of security; and a range of traditional and non-traditional issues that have emerged on the security agenda, ensuring students are provided with a comprehensive insight into all areas of the subject. The study of international security has undergone dramatic changes since the end of the Cold War. While war and the threat to use force is part of the security equation it is not exclusively so. The subject of security studies encompasses dangers that range from pandemics, such as HIV/AIDS, and the environment degradation through to the more readily associated security concerns of direct violence, such as terrrorism and inter-state armed conflict.