From national security and social security to homeland and cyber-security, ""security"" has become one of the most overused words in culture and politics today. Yet it also remains one of the most undefined. What exactly are we talking about when we talk about security? In this original and timely book, John Hamilton examines the discursive versatility and semantic vagueness of security both in current and historical usage. Adopting a philological approach, he explores the fundamental ambiguity of this word, which denotes the removal of ""concern"" or ""care"" and therefore implies a.