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.
the answer you are looking for is 4
European Emigration to the U.S. 1851 - 1860
Although the Irish potato blight receded in 1850, the effects of the famine continued to spur Irish emigration into the 20th century. Still facing poverty and disease, the Irish set out for America where they reunited with relatives who had fled at the height of the famine.
I guess one vote decrease
I’m fairly certain the answer you’re look for is, ‘The Dark Ages’ or ‘Middle Ages.’