There are four broad classifications of authoritarianism: traditional authoritarianism, military authoritarianism, one-party authoritarianism, and personalistic authoritarianism. Traditional authoritarianism is based on traditional political structures and practices, while military authoritarianism is characterized by military rule. One-party authoritarianism is where a single political party holds all power, and personalistic authoritarianism revolves around a single leader who dominates the political landscape.