Separatist feminism is a form of radical feminism that holds that opposition to patriarchy is best done through focusing exclusively on women and girls. Some separatist feminists believe that men cannot make positive contributions to the feminist movement and that even well-intentioned men replicate the dynamics of patriarchy.
Author Marilyn Frye describes separatist feminism as "separation of various sorts or modes from men and from institutions, relationships, roles and activities that are male-defined, male-dominated, and operating for the benefit of males and the maintenance of male privilege – this separation being initiated or maintained, at will, by women".
In a tract on socialist feminism published in 1972, the Hyde Park Chapter of the Chicago Women's Liberation Union differentiated between separatism as an "ideological position" and as a "tactical position". In the same document, they further distinguished between separatism as "personal practice" and as "political position".
One of the earliest, and best known examples of heterosexual separatist feminism was Cell 16. Founded in 1968 by Roxanne Dunbar, Cell 16 has been cited as the first organization to advance the concept of separatist feminism. Cultural historian Alice Echols cites Cell 16 as an example of feminist heterosexual separatism, as the group never advocated lesbianism as a political strategy, instead promoting the idea of celibacy or periods of celibacy in heterosexual relationships.
Echols credits Cell 16's work for "helping establishing the theoretical foundation for lesbian separatism".
In No More Fun and Games, the organization's radical feminist periodical, Cell Members Roxanne Dunbar and Lisa Leghorn advised women to "separate from men who are not consciously working for female liberation", but advised periods of celibacy, rather than lesbian relationships, which they considered to be "nothing more than a personal solution".