Fear of Caesar's Growing Power: Caesar had become increasingly powerful in Rome after his military conquests, and many senators feared his ambition. They believed Caesar was aiming to become a dictator or even a king, which would undermine the traditional Republican system of government and erode the power of the Senate.
Concerns Over Loss of Liberty and Republican Values: Some senators were concerned about the loss of Roman republican traditions and values under Caesar's rule. They believed Caesar's authoritarian tendencies threatened the freedom and rights of Roman citizens.
Personal Rivalries and Political Struggles: Several conspirators had personal grievances or political rivalries with Caesar. For instance, Marcus Junius Brutus, who was a close friend and protégé of Caesar, was conflicted by his personal loyalty and his commitment to preserving republican principles.
Fear of Caesar's Potential Moves: There were rumors and fears among some senators that Caesar might declare himself a perpetual dictator, disband the Senate, or even name his eventual heir as his son or one of his grandnephews (Octavius, who later became Emperor Augustus).
Desire to Restore Traditional Balance of Power: Some senators believed that by removing Caesar, the traditional power structures in Rome could be restored, and the Republic could be protected.
It's important to note that the conspiracy was a culmination of various motives, individual concerns, and a shared fear of Caesar's growing authority, which led a group of senators to plot his assassination in order to preserve their ideals and the traditional governance of Rome.