A system of government in which the leader exercises absolute power and allows no opposition is called

The system of government in which the leader exercises absolute power and allows no opposition is called totalitarianism. In this type of government, the ruler or ruling party has complete control over all aspects of people's lives, including political, social, and economic. The totalitarian leader or party uses propaganda, censorship, and force to maintain their power and suppress any opposition. Citizens have limited or no rights and freedoms, and the government's actions are not subject to any kind of checks and balances. Totalitarianism is often associated with oppressive regimes, human rights violations, and the absence of democracy. Examples of countries that have experienced totalitarianism include Nazi Germany under Adolf Hitler and the Soviet Union under Joseph Stalin.