Radical feminism is a "current" within feminism that focuses on the theory of patriarchy as a system of power that organizes society into a complex of relationships producing what radical feminists claim is a "male supremacy" that oppresses women. Radical feminism aims to challenge and to overthrow patriarchy by opposing standard gender roles and what they see as male oppression of women, and calls for a radical reordering of society. Early radical feminism, arising within second-wave feminism in the 1960s, typically viewed patriarchy as a "transhistorical phenomenon" prior to or deeper than other sources of oppression, "not only the oldest and most universal form of domination but the primary form" and the model for all others. Later politics derived from radical feminism ranged from cultural feminism to more syncretic politics that placed issues of class, economics, etc. on a par with patriarchy as sources of oppression.
The term radical in radical feminism (from Latin rādīx, rādīc-, root) is used as an adjective meaning of or pertaining to the root or going to the root. Radical feminists locate the root cause of women's oppression in patriarchal gender relations, as opposed to legal systems (liberal feminism) or class conflict (socialist feminism and Marxist feminism).
The term militant feminism is a pejorative term which is often applied to radical feminism, but also to other currents within feminism.