The United States is abrogating the Anti-Ballistic Missile Treaty in order to deploy a limited missile defence shield. Amongst other developments, this is prompting a reconsideration of the global security framework. However, a crucial element is missing from the current missile defence proposals: a clearly articulated concept of peaceful use, applicable both to outer space and to earth-space. The deployment of missile defence runs counter to emerging norms. It has effects going far beyond the abandonment or re-configuration of specific Cold War agreements. In a community of nations committed to the maintenance of international peace and security (cf. national or plurilateral security), sustainable meaning for widely used and accepted norms of peaceful use and peaceful purposes is at risk.
