Building on the work of second-wave radical feminist theorists from fields such as communication studies, sociology, history, and women’s studies; on the work of community-based and grassroots radical feminist theorists and activists; and by examining prostitution and the responses to this form of male violence against women, this dissertation proposes a female-centered theory of colonization and subsequently of decolonizing feminism. Incorporating first-hand prostitution research done in New Zealand and across Canada and by questioning my own uncritical acceptance of the historical social and political status of Indigenous women in Canada, critically looking at the roles of culture and tradition in the oppression of Indigenous women, and by building a decolonizing feminist methodology in the process, this work troubles the very concepts of “colonization” and “feminism” as we currently understand them. Building on over a decade of work as part of the women’s liberation movement, Not Sacred, Not Squaws redefines colonization and situates decolonizing feminism as a distinct and foundational— as opposed to separate and different— component of the women’s liberation movement.