Feminist radicalism

Feminist radicalism is defined in Joanna Russ's What Are We Fighting For?, p.20., as:

the oppressed taking their own oppression and their own understanding of their oppression as primary and refusing to bow to any intellectual authority except their own precisely because, in a society corrupt enough to practice oppression, "intellectual traditions" are all too apt to be corrupt too.

The term "radical feminist" may refer to either feminist radicalism or radical feminism.

Both approaches take "radical" to mean "going at the root of the problem", whereas antifeminists use "radical" interchangeably with "extreme", as a derogatory term.