The idea has appeared various times in history such as among the Cathars of Medieval France, the Saint-Simonians in the early 1800s, the Greenwich Village movements of the early 1900s, and among hippies in the 1960s and 1970s.
The movements which support free love tend to be utopian collectivist ones which see the traditional institutions of marriage and family as oppressive. Partly because of these anti-institutional views, free love cultures and those that support polygamy tend to be quite hostile to each other.
See also: Sexual revolution, New Woman, Open marriage
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