The optimism that arrived at the end of the cold war and marked the turn of the Millennium was shattered by September 11. In the aftermath of that event it is not unwarranted pessimism that lines the pages of , it is unavoidable reality. Terrorism is but one aspect of many other wider concerns for national and international security, and the contributors to this volume not only warn us, but reward us as well with the clarity of their views intoand possible solutions fora difficult, complicated future. They speak convincingly of the numerous military and non-military challenges that create security problemswhether those are interstate, intrastate, or transnationalmany of which are being dangerously overlooked in public policy debates.

The challenges and complexities might seem insurmountable but the first step in solving problems is recognizing that they exist. provides an eye-opening assessment of the prospects for peace and security in the 21st century.

Michael E. Brown frames these issues in his Introduction, "Security Challenges in the 21st Century;" and in his summation, "Security Problems and Security Policy in a Grave New World."