Tyranny

noun the principle or practice of a political system in which unrestricted power is vested in a monarch, dictator, etc.

• Absolutism refers to a political theory that advocates for the concentration of power in a single ruler.
• Some people believe absolutism is necessary for effective governance.
• I don't buy into the whole absolutism thing, I think power should be shared.
• In the realm of art, the artist's absolutism in his vision led to a masterpiece.

noun a form of government in which a single entity rules with absolute power

• The country was under the rule of despotism for many years before transitioning to a democracy.
• The people were tired of living under despotism and longed for more freedom.
• Living under that leader's despotism was a nightmare.
• The despotism of social media algorithms dictates what content we see.