A person who actively supports or argues in favor of an idea, plan, or cause.
“Proponents of the new curfew say it will reduce youth crime rates.”
“Proponents argue that solar panels will eventually pay for themselves.”
In viewpoint passages, proponents are directly contrasted with opponents, so identifying who is a proponent helps you sort arguments by side quickly. Watch for proponents being quoted directly, since their exact reasoning is often tested.
Synonyms: supporter, advocate, backer