ABSTRACT
This chapter explores three elements of security/ethics illuminated by diverse posthumanist viewpoints. It examines the concept of subjectivity to explain how discourses, norms and practices of security impose boundaries on ethical consideration. The chapter engages with conceptions of relationality to demonstrate how issues of security traverse these ethical boundaries. It explores how posthumanist perspectives complicate notions of human agency, including the effectiveness of human interventions into the ecosphere. A basic principle of posthumanism is the decentring of dominant conceptions of humanity' and humanism that is, the questioning of their status as the sole basis of ontology, cosmology and ethics. Anthony Burke's recent work has given a much more nuanced account of how cosmopolitanism might be widened in order to account not only for the security of humans but also for the demand for ecological security.
