Red-baiting, also known as reductio ad Stalinum and red-tagging, is an intention to discredit the validity of a political opponent and the opponent's logical argument by accusing, denouncing, attacking, or persecuting the target individual or group as anarchist, communist, Marxist, socialist, Stalinist, or fellow travelers towards these ideologies. In the phrase, red refers to the color that traditionally symbolized left-wing politics worldwide since the 19th century, while baiting refers to persecution, torment, or harassment, as in baiting.