
The Roman emperor Caligula ruled for only four years before he was assassinated. Caligula was hated by the Roman people, and historians hated him, too. The tales of his madness and misdeeds are likely exaggerated, and sometimes invented, just to show what a monster he was.
In any case, it seems true that he was mentally unbalanced. He declared himself a god. He spent a fortune on his palace and put up statues of himself. He forced the Senate to watch him dance in the middle of the night. He passed laws to keep people from looking at his bald spot. He mocked and insulted people. He was also a sadist. Among other things, he sometimes locked up the food supplies so the population would starve. He really made politicians mad when he announced his plan to appoint his horse to the Senate, making it clear that he thought an unqualified beast could do just as good a job as anyone else.
His unpopularity reached its peak, and officers of his own Praetorian Guards conspired to kill him. Led by a man Caligula had mocked for having a squeaky voice, they stabbed him to death and then declared his uncle Claudius the new emperor. That's how they did impeachment in 41 A.D.
To this day, Caligula is remembered as a cruel, narcissistic, depraved tyrant. Unqualified political appointees are sometimes compared to Caligula's horse.
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