Usually the person who have the power to control like a leader or the high ranking administrator have some trouble or betrayal. And most of reasons are the power. They want to be the leader who has the power that can control everything and who is the best. Also, the people who have the power are trying to use their in wrong way. The Shakespeare's play shows the conflicts between the leader and the high ranking administrators. It shows murder of the characters in his play.
Julius Caesar was a real person. He was the leader of Rome. Julius Caesar had power as every leader has. He believed in superstitions. He used his power to use people for his advantage. He was ambitious. Brutus was a person who respected Caesar even though he hated dictatorship. However, Brutus killed Caesar because Cassius incited Brutus's pride and induced him to kill Caesar. After Caesar was killed, Brutus and Antony made their speeches. The important thing is the power of their speech. Brutus tried to persuade the crowd. Antony tried to stood on the crowd's side. He tried to instigate the crowd and stir up their passion. It looked Brutus's quiet and logical speech persuaded people at the first. However, after Antony's speech, people stood on Antony and Caesar's side because Antony's speech was passionate and rhetorical. People who joined in Caesar's assassination ran away and Antony won finally. The relationship between the crowd and the power is very important because the crowd is the power.
I think the title of the play is Julius Caesar but, the main character is Brutus. He was virtuous and rational. He was the sole conspirator that killed Caesar for Roman honor and freedom, not ambition or ulterior motive. Antony and Octavius knew that Brutus is respectful. Even though Cassius wanted to kill Antony who is favorite of Caesar, Brutus disagree with him and didn't kill Antony. But, Antony's speech made the crowd riot. Brutus was too rational without grasping the crowd's characteristic.