Which politician changed the roman constitution so much, especially weakening the plebeian tribunate, that it was never the same again?

Lucius Cornelius Sulla the Roman dictator was the one responsible for the dramatic changer in Roman consitution. Sulla's politics was rather conservative, and Sulla had an objective to strengthen the Roman Senate and reduce the power of the plebeian tribunes. He retired in 79BC.

idk you know what i mean hahahaha

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes