I examine a problem or dilemma of legitimation faced by the critical theorist who takes as the object of his or her critique a totality of which she or he is a part. The dilemma is that the theorist must either illegitimately exempt her critical theory from the determining influences of the totality or lose normative authority. The critics I examine in detail are: Adorno and Horkheimer; Kant; Hegel; feminist standpoint epistemologists, in particular, Sandra Harding; Irigaray; Foucault; and Arendt. ;I (...) conclude that a purely theoretical or epistemic ground for the legitimacy of totalizing critique is impossible; philosophical critique must involve an extra-rational faith or a political commitment. However, I also argue that the project of theoretical grounding should not be abandoned. I continue this project by drawing out of the critical theorists I examined some preliminary concepts and strategies that may, after further development, serve to provide a theory of the legitimacy of critical philosophy. (shrink)