Which type of governance is characterized by a single entity or person having the ultimate authority over a state or organization?

The type of governance where a single entity or person has ultimate authority is called autocracy. In an autocracy, one leader makes all the important decisions without needing to consult others, which means they have complete control over the government and its actions. This can sometimes lead to efficient decision-making, but it can also result in abuses of power since there is little to no check on the leader's actions. For example, in a country ruled by a dictator, that dictator can enforce laws and policies without any input from the citizens or other governing bodies. While this type of governance can lead to quick decisions, it often lacks the fairness and representation found in democratic systems.