Final answer:
Brutus objects to inviting Cicero to the plot against Caesar because he believes Cicero will only follow a plan he has initiated and is too independent to join a conspiracy started by others.
Step-by-step explanation:
Brutus's objection to inviting Cicero to join the conspiracy against Caesar stems from the belief that Cicero is unlikely to follow others' leads or be part of an action that was not initiated by himself. In William Shakespeare's play Julius Caesar, Brutus argues that Cicero is too independent and would not go along with a plan in which he was not the leader or the one who designed it. This is exemplified by the historical context of the late Roman Republic, where Cicero, known for his oratory prowess and political influence, was considered to be a figure who valued his own principles.