noun
Refers to a person who advocates a return to a previous political or social order; often used in political or historical contexts.
彼は急進的な改革に反対する復古論者だ。
He is a reactionary who opposes radical reforms.
保守主義者 is a conservative who prefers gradual change, while 復古論者 is a reactionary who wants to restore a past order.
Compound of 復古 (return to the past) + 論者 (advocate, theorist).