He feared Caesar's tyranny towards Rome after being crowned.
Brutus joins the plot to assassinate Julius Caesar with Caesar's dying words being 'Et tu Brute'
Both of the Brutii. Marcus Brutus and Decius Brutus were both Caesar's friends, Decius even being mentioned in Caesar's will.
In Julius Caesar, common people treated Julius like a god. Brutus knew people wanted Julius to be King, but Brutus feared that "power corrupts; absolute power corrupts absolutely". Brutus thought power centered in one man, Caesar, would overturn the republic.
Marcus Brutus joined the conspiracy to kill Julius Caesar because he, being an idealist, thought that he was saving the government.
Caesar, at the point of being assassinated, was reputed to have exclaimed, "Et tu, Brute?" In English it means "you too, Brutus?"
Cassius has a lot of envy towards Caesar, he wants the power and wont let casar get it! so he manipulates brutus into thinking that Caesar is a tyrant and that hes going to abuse his power. brutus, being an idealist, believes Cassius and assassinates his friend, Caesar.
I believe that Brutus was a little ticked off in way, because even though Caesar was powerful, he was physically weak, and had many others things gone wrong with him, such as epilepsy for instance. You can see if this is true or not in Act I i believe, if not Act II, but Brutus talks about how he had to get him from the Tiber river, and how Caesar had a seizure, and was shaking on the ground and such, and the foam was coming out of Caesar's mouth and everything, he was screaming for Brutus's help. And Brutus of course went and helped him out.
The Brutus in Julius Caesar was Marcus Junius Brutus, a Roman politician and former supporter of Caesar.His break with Caesar was precipitated by Caesar making himself perpetual dictator and getting himself deified. He joined with Cassius and others in a plot to assassinate Caesar.On 15mar44 BC they attacked Caesar at the Senate, and the death blow was struck by Brutus.Caesar's last word were, "Et tu, Brute (And you too, Brutus?)"
Brutus and Caesar talking alone
He is a senator who is said to have stabbed Caesar last and killing him. He committed suicide when being hunted by mark Antony and octavius for the assassination.
Julius Caesar was assassinated by a group of conspirators, and one of the key figures in this plot was Marcus Junius Brutus. Despite being one of Caesar's closest friends and allies, Brutus ultimately joined the conspiracy out of a belief that Caesar's power threatened the Roman Republic. His betrayal is famously encapsulated in Caesar's last words, "Et tu, Brute?" indicating his shock at Brutus's involvement.
Cassius wants Brutus to join in a conspiracy to kill Julius Caesar. He tells Brutus stories of Caesar to poison his mind and make Brutus believe that Caesar wants to set himself up as a tyrant.