"Following Butler, agency is not taken as entailing autonomy, since all behavior, including the ability to act and speak as a subject, is at once made possible and restricted by social norms and power relations:
"Because the agency of the subject is not a property of the subject, an inherent will or freedom, but an effect of power, it is constrained but not determined in advance. If the subject is produced in speech through a set of foreclosures, then this founding and formative lim- itation sets the scene for the agency of the subject. Agency becomes possible on the condition of such a foreclosure. This is not the agency of the sovereign subject, one who only and always exercises power instrumentally on another. As the agency of a post-sovereign sub- ject, its discursive operation is delimited in advance but also open to further and unexpected delimitation.""
(Esther Peeren, The Spectral Metaphor, p.16)