Single-party systems are characterized by the dominance of one political party, which controls the government, often limiting or prohibiting opposition parties. In these systems, the ruling party usually dictates policy-making, with little input from rival factions, undermining the principles of political pluralism. Such systems may be found in authoritarian regimes, where dissent is suppressed, and governance is centralized. While they can lead to efficient decision-making, they often stifle democratic freedoms, civic engagement, and the representation of diverse viewpoints.