Through a reinterpretation of publications, interviews with long-term activists, and an analysis of change in the social environment, this article explains why feminist ideology failed to create unity among feminist women in the United States during the period 1966-1975, the years when contemporary feminism emerged. In spite of the desire to create a community of women to challenge the existing sociocultural structure, schisms within the movement often created divisive and antagonistic feminist group relations. In contrast to earlier research that attributed (...) this lack of unity to competing ideologies, this article argues that, in many cases, feminist leaders used ideology and theory to promote radical self-identities that maintained existing social structural divisions. Thus, while feminism established a principle of unity for women as a group, disputes over ideological purity created divisions within the movement based on differences among women. (shrink)