In this new edition of National Security in a New Era, renowned security scholar Donald M. Snow continues to provide the most up-to-date and comprehensive analysis of the United States' national security situation and the security policies the U.S. adopts. This text examines national security from two fundamental fault lines--the end of the Cold War and the 9/11 terrorist attacks--and considers how the resulting era of globalization and geopolitics guides policy. Placing this trend in conceptual and historical context and following it through military, semi-military, and non-military concerns, National Security in a New Era treats its subject as a nuanced and subtle phenomenon that is evolving to encompass everything from the nation to the individual.