I believed among all the city states in Greece, the most important was Athens. It was one of the oldest cities of the world and the center for arts, science, architecture, politics, and philosophy. The medieval period was inspired by its culture. This was a place were great Philosophers came; Aristotle, Plato, and Socrates. All of these are essential elements that became a foundation of man's development.
Difficulty of absentee voting
Having checks and balances between the three branches of government
natural rights of every man
the consent to be governed
the belief that the government is responsible for the protection of it's citizens <span />