The death of Julius Caesar is a central event of the play, Julius Caesar, and as such much anticipation is created before this event actually occurs. Shakespeare builds up the suspense before breaking it all down with the death of this main character. The conspirators had a variety of reasons for which they wanted to kill Caesar but the central idea was that they did not want any man to be so powerful and influential in the ruling of Rome. For a very long time, Rome was never ruled by any one man.It is said that power corrupts and absolute power corrupts absolutely. Caesar was very near being crowned King and the conspirators did want him going mad with power. As prevention is better than cure they decided it was best to kill Caesar before he had a chance to destroy the city of Rome. This is the reason to be presented to the public and is the reason that Brutus uses to make his deeds seem honourable saying "think of him as a serpent's egg, which, hatched would as his kind, grow mischievous, and kill him in the shell." The other conspirators have secret motives which are anything but honourable. They feared for their social standing as Julius Caesar had promised the people of Rome more equality and less poverty. This would mean than their privileged positions would no longer be privileged and they'd have no say in the governing of Rome. They saw Julius Caesar as a threat to the luxurious life they were accustomed to living and so they wanted him gone. .
Cassius also has a few personal reasons for wanting Caesar dead. A minor reason is that Caesar was a threat to Cassius' life as Cassius was aware that Caesar disliked and might have him killed saying "Caesar doth bear me hard; but he loves Brutus" in Act 1 Scene 2. The driving force for Cassius' need to kill Caesar is his deep envy and jealousy of Caesar. Cassius believes that he should be just as much, if not more powerful than Caesar as he "was born free as Caesar," "[they] both have fed as well and [they] both can endure the winter's cold as well as [each other].