Includes bibliographical references and index. Williams, P. D. (Ed.). (2013). Security studies: An introduction (2nd ed.). Abingdon, Oxon: Routledge.

Security studies: an introduction -- Part 1: theoretical approaches -- Realisms -- Liberalisms -- Game theory -- Constructivisms -- Peace studies -- Critical theory -- Feminisms -- International political sociology -- Part 2: Key concepts -- Uncertainty -- Polarity -- Culture -- War -- Coercion -- Terrorism -- Intelligence -- Genocide and crimes against humanity -- Ethnic conflict -- Human security -- Poverty -- Climate change and environmental security -- Health -- Part 3: Institutions -- Alliances -- Regional institutions -- The United Nations -- Peace operations -- The nuclear disarmament and non-proliferation regime -- Private security -- Part 4: Contemporary challenges -- The international arms trade -- Counterterrorism -- Counterinsurgency -- The responsibility to protect -- Transnational organized crime -- Population movements -- Energy security -- Part 5: Conclusions -- The academic and policy -- What future for security studies?