The women's liberation movement (WLM) was a political alignment of women and feminist intellectualism that emerged in the late 1960s and continued into the 1980s primarily in the industrialized nations of the Western world, which effected great change (political, intellectual, cultural) throughout the world. The WLM branch of radical feminism, based in contemporary philosophy, comprised women of racially and culturally diverse backgrounds who proposed that economic, psychological, and social freedom were necessary for women to progress from being second-class citizens in their societies.

Towards achieving the equality of women, the WLM questioned the cultural and legal validity of patriarchy and the practical validity of the social and sexual hierarchies used to control and limit the legal and physical independence of women in society. Women's liberationists proposed that sexism—legalized formal and informal sex-based discrimination predicated on the existence of the social construction of gender—was the principal political problem with the power dynamics of their societies.

In general, the WLM proposed socio-economic change from the political left, rejected the idea that piecemeal equality, within and according to social class, would eliminate sexual discrimination against women, and fostered the tenets of humanism, especially the respect for human rights of all people. In the decades during which the women's liberation movement flourished, liberationists successfully changed how women were perceived in their cultures, redefined the socio-economic and the political roles of women in society, and transformed mainstream society.