In 1971, a group known as Purple September [nl] formed along the lines of liberationist lesbians in the United States. Their name derived from Betty Friedan's reference to lesbians as the "Lavender Menace" and they operated as a separatist group, believing that all women were lesbian and should not bed their oppressers.[69] Rather than reforming the existing society with its hierarchical structure giving men priority, they called for the creation of separate societies for women to evaluate their marginal positions in the family and society as well as the politicization of personal issues.[74] These ideas were characterized by Dutch media much as they were in other places and women who advocated for separatism were seen as being anti-male.[75] After 1974, the liberationist groups in the Netherlands gave way to action groups and liberal feminist groups aimed at legal change, as they believed that thought had significantly changed and political action was necessary.[73]