A person who actively works toward achieving a goal or supporting a cause, often in politics, social justice, or other advocacy movements.
From campaign (a series of coordinated activities) plus -er (one who does). Campaign comes from French campagne, from Italian campagna, ultimately from Latin campus (field), referring to military operations in open countryside.
The word campaign literally comes from fighting in fields—military generals planned outdoor strategies called 'campaigns'—so when we call social activists 'campaigners,' we're using ancient military language for peaceful change-makers.
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