Even after Brutus has committed the assassination with the other members of the conspiracy, questions remain as to whether, in light of his friendship with Caesar, the murder was a noble, decidedly selfless act or proof of a truly evil callousness, a gross indifference to the ties of friendship and a failure to be moved by the power of a truly great man.
Brutuss rigid idealism is both his greatest virtue and his most deadly flaw. In the world of the play, where self-serving ambition seems to dominate all other motivations, Brutus lives up to Antonys elegiac description of him as the noblest of Romans. However, his commitment to principle repeatedly leads him to make mistakes that cost him much: wanting to curtail violence, he ignores Cassiuss suggestion that the conspirators kill Antony as well as Caesar. In another moment of rampant idealism, he again ignores Cassiuss advice and allows Antony to speak a funeral oration over Caesars body.
As a result, Brutus forfeits the authority of having the last word on the murder and thus allows Antony to incite the shocked Roman crowd to riot against Brutus and the other conspirators. This is similar to when Regina George incites the entire school into chaos using the burn book. Brutus later endangers his good relationship with Cassius by self-righteously condemning what he sees as dishonorable fund-raising tactics on Cassiuss part. This is similar to how Cady views Regina, with respect and with friendship, but also with contempt. In all of these episodes, Brutus acts out of a desire to limit the self-serving aspects of his actions; ironically, however, in each incident he dooms the very cause that he seeks to promote, thus serving no one at all.
The changes that shape Brutus and Cady are very interesting because they correlate so well. These changes occur because of the spurring of other characters. In Julius Caesar, Brutus is spurred on by Cassius and his conspirator band. In Mean Girls, Cady is spurred on by Janice (who is Cassiuss parallel). This spurring directly influences the characters actions and thoughts. Brutus probably wouldnt ever have acted on this plot if it wasnt for Cassiuss flattering comments. Cady wouldnt have followed her path if she didnt befriend or follow Janices ideas. Brutus and Cady develop along the same line in their respective stories, which is to be expected as they are the same character in similar settings.