Answer:
they were no longer focused on issues involving illness and war
The idea is known as the Republican form. The idea is that people democratically elect those who would represent them in a government, and those people would be held accountable for what they've done if they do something opposite to the will of the people. It's the only way that a democracy can work properly because others would be impossible with that many people.
The reason they went to war is when the Athens interfered in Persian affairs.
Make a list of ur job preferences so c :p