The Supreme Court Ruling was important as it decided that free speech could only be limited if it incited harm. Ohio's law saying that group could not gather to talk about criminal syndicalism broke the 1st amendment as it didnt incite harm
The answer is approval of conventions in three-fourths of the states.
The end of the Peloponnesian War was when the 421 Truce treaty signed
so that the gods didnt get mad at them