In this dissertation I develop a philosophical theory of scapegoating that explains the role of blame-shifting and guilt avoidance in the endurance of oppression. I argue that scapegoating masks and justifies oppression by shifting unwarranted blame onto marginalized groups and away from systems of oppression and those who benefit from them, such that people in dominant positions are less inclined to notice or challenge its workings. I first identify a gap in our understanding of oppression, namely how oppression endures despite (...) widespread formal commitments to principles of equality and justice. I argue that prominent theories of oppression do not place enough weight on the question of how oppression is justified and concealed from us through blame-shifting, in ways that enable its persistence without our explicit approval of its systems. Scapegoating, a concept as old as the Bible, offers potential insight into the means through which we shift blame and avoid responsibility. However, my survey of the genealogy of scapegoating shows that existing conceptualizations of scapegoating are limited in their scope and cannot be applied to explain the endurance of oppression. I propose an ameliorative theory of scapegoating that accounts for deficiencies in prevailing theories of both oppression and scapegoating. Distinct from interpersonal theories and psychologistic analyses of scapegoating, my theory characterizes scapegoating according to its social function in oppression, thereby explaining structural dimensions that are not already captured by other accounts.With the motivation and ingredients in place, I develop my theory of scapegoating as made up of three sub-mechanisms: essentialization of marginalized groups as blameworthy, collective interest in protection against a threat, and social exclusion of the blamed. These sub-mechanisms work together to construct certain groups as scapegoats and encourage us to treat them accordingly through various structural and interpersonal means. I argue that scapegoating has important implications for the formation of social identities; namely, scapegoating constructs social identities in an oppressive arrangement that is largely hidden from us but informs our social and affective relations. By constructing some identities as essentially blameworthy and threatening, dominantly situated identity groups are encouraged to internalize a protected status, act together in defense of their status, and maintain systems of oppressive exclusion. Finally, I elaborate the epistemic dimensions of my theory of scapegoating to argue that scapegoating functions within our social imaginaries and structural epistemic practices. In particular, I focus on the ways that ignorance functions to maintain the scapegoat mechanism, and how scapegoating helps insulate structural forms of ignorance. I end by considering the potential for resistance to scapegoating. (shrink)