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. Background The wave theory of social development holds that intense periods of social activity are followed by periods of remission, in which the activists involved intensely in mobilization are systematically marginalized and isolated. After the intense period fighting for women's suffrage, the common interest which had united international feminists left the women's movement without a single focus upon which all could agree. Ideological differences between radicals and moderates, led to a split and a period of deradicalization, with the largest group of women's activists spearheading movements to educate women on their new responsibilities as voters. Organizations like the African National Congress Women's League, the Irish Housewives Association, the League of Women Voters, the Townswomen's Guilds and the Women's Institutes supported women and tried to educate them on how to use their new rights to incorporate themselves into the established political system. Still other organizations, involved in the mass movement of women into the workforce during World War I and World War II and their subsequent exit at the