A person who believes in or supports collectivism, the idea that group needs should be prioritized over individual needs.
From collectivism (collective + -ism) plus -ist meaning 'one who practices or advocates.' This term developed in 19th-century political philosophy to describe those favoring communal over individual ownership.
Interestingly, collectivist cultures (common in East Asia and Africa) actually produce happier, more stable societies in some metrics, contradicting Western individualist assumptions about what makes people content.
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