Ambition leads to disaster for Caesar, Cassius and Brutus because they all die as a result. Julius Caesar was killed by a conspiracy of senators because they felt that he was too ambitious. Caesar marched on Rome and defeated Pompey, the former Roman Consul. Many senators felt that he had over-reached his authority. They worried that he was setting himself up to be king, and wanted to stop him before he had so much power that he was unstoppable. Brutus explains to the people in his funeral speech that Caesar died for his ambitions. As Caesar loved me, I weep for him; as he was fortunate, I rejoice at it; as he was valiant, I honour him: but, as he was ambitious, I slew him. There is tears for his love; joy for his fortune; honour for his valour; and death for his ambition. (Act 3, Scene 2) As far as Brutus is concerned, Caesar deserved death and they are heroes for killing him. He wants the people to feel the same way. Unfortunately for him, Mark Antony gives a speech after Brutu...