Because it had a great effect on history.
Athens used force to keep city-states from withdrawing from the league and <span>The purpose of the league was to keep Persia from conquering Greece.</span>
The law does not require citizens to vote, but voting is a very important part of any democracy. By voting, citizens are participating in the democratic process. Citizens vote for leaders to represent them and their ideas, and the leaders support the citizens' interests.
The answer to your question is Magna Carta
