What does Brutus fear in relation to Caesar's potential rule?

Brutus's fear regarding Caesar's potential rule centers on the possibility that Caesar may abuse his power. This concern emerges from Brutus’s deep sense of honor and belief in the Roman Republic. He worries that if Caesar becomes too powerful, he could transform from a leader into a tyrant, overriding the values and principles that the republic stands for. Brutus's commitment to the welfare of Rome leads him to this apprehension, as he prioritizes the public good over personal loyalty to Caesar. This fear of power abuse is fundamental to the themes of ambition and responsibility that run throughout Shakespeare's "Julius Caesar." The other choices do not encapsulate the broader implications of his concerns about tyranny and the potential threat to the republican ideals he values.