Who do you think is the main character in the play The Tragedy of Julius Caesar?

Most scholars consider Brutus the protagonist of Julius Caesar. He is certainly the most complex and fully explored character of the play. He is portrayed as a friend, a husband, a military leader, and a strong public leader, all in detail. The audience gets insights into Brutus's thoughts through a few soliloquies, as well as comments to other characters, such as when Cassius asks Brutus what's on his mind: 

"Cassius,Be not deceived. If...

Most scholars consider Brutus the protagonist of Julius Caesar. He is certainly the most complex and fully explored character of the play. He is portrayed as a friend, a husband, a military leader, and a strong public leader, all in detail. The audience gets insights into Brutus's thoughts through a few soliloquies, as well as comments to other characters, such as when Cassius asks Brutus what's on his mind: 

"Cassius,
Be not deceived. If I have veiled my look,
I turn the trouble of my countenance
Merely upon myself. Vexèd I am
Of late with passions of some difference,
Conceptions only proper to myself,
Which give some soil, perhaps, to my behaviors.
But let not therefore my good friends be grieved
(Among which number, Cassius, be you one)
Nor construe any further my neglect,
Than that poor Brutus, with himself at war,
Forgets the shows of love to other men" (1.2.42-53).

Brutus' complexity as a character is clear here. He is a deeply thoughtful man who works hard to do what is right, not for himself alone, but for society as a whole.

Additionally, Brutus is viewed by many as a tragic hero. Like many tragic heroes, Brutus's greatest trait is also his downfall: his strict ideals and virtue. Antony rightly calls Brutus the "noblest Roman." However, it is exactly through this trait that Cassius convinces Brutus to participate in the assassination, despite Brutus's personal love for Caesar as a friend. More problems are created when Brutus determines that it is too bloody and violent to kill Antony as well, and even more when he lets Antony speak as Caesar's funeral. In each of these acts, Brutus is trying to do the right thing for those involved and Roman society as a whole. In each, however, his good intentions backfire and chaos and war reign.