When you sit down to write, or talk, about feminism, you realize that it's an exploded ideology. Consider my friend S., who doesn't like to call herself a feminist. I don't do Dutch. I expect a man to open doors and to offer to carry my bags. Postfeminists, in general, love irony and deplore boring narratives.
All universal certainties are up for grabs.
Feminism found its most populist call in the idea that being a woman was an empowering identity, and one similar enough from person to person to serve as a unifying force.