Politically, the fundamental subject of the play is the decline of republicanism in Rome and the emergence of Caesarism. In the opening scene, the people gives unwitting proof of the increasing monarchical mood. This is exemplified by their scream in the Third Act, "Let him be Caesar." Then, in the final scene, they proclaim Caesar a god. This transformation is reflected in the personal lives of many of the characters too. For example, Pompey becomes obsessed with power to the point where he rejects his wife's love. This leads directly to his death. Also, Brutus shows no mercy when he murders Pompey. This proves that even great men such as these can be influenced by passion. Finally, Mark Antony falls in love with Queen Cleopatra and declares himself her servant. This behavior is evidence that even noble souls can be seduced by glory and wealth. In conclusion, the central idea of the rise of Julius Caesar is the gradual transformation of Rome from a republic into an empire. This occurs because political leaders such as Pompey and Caesar gain power over the masses through fear and lust for revenge.