Rome managed to overcome it's difficulties with having issues in it's leading structure and the highest chain in command; namely Roman generals at the time wanted glory for themselves which prevented them from beating Carthage for some period together with the fact that Carthage had the incredible general Hannibal. After they consolidated and joined forces together, they were able to beat Carthage after a campaign of war.
Sacco and Vanzetti were two working class, italian immigrants in the USA, but they were also anarchists. Their political ideas were influenced by the ideas Russian anarchists like Mikhail Bakunin and Piotr Kropotkin.
Since politicians did not want revolutionary ideas like communism or anarchism to expand in the United States and suffer a social uprising like the Russian revolution, communists and anarchists were usually targeted by the police.
In addition to that, racism and nativism in favour of white european, especially white anglo saxon people aslo contributed to the profiling of certain ethnic groups.
Since Sacco and Vanzetti were italian immigrants and also anarchists, they were immediately targeted as guilty of robbery and murder, even though there were no definitive evidence.
There were long seeded differences between the United States and the Soviet Union over ideologies. In the Russian Revolution of 1917 the communists took power. The United States and Britain were worried that the same thing might happen in their countries.
A hasty generalization is a conclusion based on a small sample size, rather than looking at statistics that are much more in line with the typical or average situation.
A sample of hasty generalization is when FDR says in his speech that the attack yesterday on the Hawaiian Islands has caused severe damage to American naval and military forces. I regret to tell you that very many American lives have been lost. FDR based this conclusion on what probably was told but not even the military at Pearl Harbor knew the exact numbers of deceased but several day later.
The factor that increased is "Legislation that removed unfair electoral requirements"
In 1960 only 5% of African Americans were registered to vote
