This book, part of the Companions series, provides succinct yet robust definitions and explanations of core concepts and themes in relation to state power, liberties and human rights. Laid out in a user-friendly A-Z format, it includes entries from expert contributors with clear direction to related entries and further reading. It will be suitable for undergraduate and postgraduate students on a variety of courses such as Criminology, Criminal Justice, International Relations, Politics, Social Policy, Policing Studies, and Law as well as other researchers in these areas.