What kind of a world is one in which border security is understood as necessary? How is this transforming the shores of politics? And why does this seem to preclude a horizon of political justice for those affected? Border Security responds to these questions through an interdisciplinary exploration of border security, politics and justice. Drawing empirically on the now notorious case of Australia, the book pursues a range of theoretical perspectives - including Foucault's work on power, the systems theory of Niklas Luhmann and the cybernetic ethics of Heinz Von Foerster - in order to formulate an account of the thoroughly constructed and political nature of border security. Through this detailed and critical engagement, the book's analysis elicits a political alternative to border security from within its own logic: thus signaling at least the beginnings of a way out of the cost, cruelty and devaluation of life that characterises the enforced reality of the world of border security.