Abstract
This chapter presents a rights-based explanation of self-defence. A right of defence exists when a subject is at liberty to defend a certain good by performing an action that would otherwise be impermissible. The moral justification for this liberty invokes three considerations: an appropriate normative relation exists between the subject and the end of the right, consisting of either of a right to, or a duty of care towards the good protected; the defensive act is a proportionate, necessary response to an imminent threat of harm; and the object of defensive force has an appropriate degree of normative responsibility for, and the subject is innocent of, the harm threatened.