Explanation: The Brothers Gracchi were two democratically elected reformers in the Late Roman Republic who made a cause of the issue of land reform and the plight of the urban poor - a cause of the populares.
They were killed by the aristocracy, the optimates. The supporters of the Gracchi were repressed, and their passed reforms hamstrung.
Gaius Julius Caesar, of conqueror and dictator fame, was an official who eventually (effectively) usurped the title of dictator over the Republic; a traditional title which gave Caesar wide-ranging powers to implement what reforms he deemed fit. He deemed fit the issue of land reform, debt relief, and the plight of the urban poor, as a lifelong (if moderate) populare.
He was killed by the aristocracy, the optimates, many of whom he had pardoned without preconditions even after their civil war with him.
The supporters of Caesar were not repressed, though not for a lack of desire on the aristocracy. Rome was lit aflame, both metaphorically and literally, as the people’s outpouring of grief and anger turned into a riot. The people, who loved Caesar (he was a charismatic devil. had popular policy successes to his name, and was always very liberal with his wealth), refused to take yet another reformer brutally and unlawfully killed by the ultra-wealthy seeking to defend their own privileges.
Despite Caesar's successor, Augustus, being a much more conservative figure, the fury of the Roman people after Caesar's funeral solidified the measures Caesar took, as Caesar's old partisans and the assassins both agreed (doubtlessly partly out of self-preservation) in the Senate to retain all the reforms passed by Caesar.