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Why was Julius Caesar assassinated in 44 BCE?

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ancient Rome The Temple of Saturn (foreground) and the Arch of Septimius Severus in the Roman Forum.

Julius Caesar was assassinated on March 15, 44 BCE, because his peers in the Roman Senate believed his consolidation of power threatened the Roman Republic.1

By 44 BCE, Caesar had assumed the role of dictator, and his actions—including the acceptance of various honors and his tendency to centralize authority—led many to fear he was moving toward kingship, a concept deeply abhorred in Roman society. As he effectively embodied the state, he alienated his fellow aristocrats, who felt he had placed himself in a position no Roman should occupy.2

The assassination plot, which involved approximately 60 men including Marcus Junius Brutus and Gaius Cassius Longinus, was driven by a mix of motives, ranging from genuine concern for the Republic to personal grievances. Ultimately, the conspirators struck him down because they saw no other way to resolve the political crisis caused by his dominance. His death served as a major turning point that contributed to the end of the Republic and the eventual rise of the Roman Empire.12