Absolute rulers are individuals who have complete control over their subjects and are not accountable to any other authority. Emperors, TYRANTS, and tsars are all examples of absolute rulers. An emperor is a sovereign ruler of an empire, typically inheriting the title from a predecessor. A tyrant is a cruel and oppressive ruler, often ruling without legal authority. Lastly, a tsar is a title used by Slavic monarchs, similar to an emperor.