I believe the answer is: Aristotle, Plato, and Socrates
Aristotle and Plato promote the idea of political system and ethical values that later on develop into a democratic system of government that is used by most countries today.
Socrates on the other hand, believe that democracies had a lot of flaw and only a handful of selected people should be able to make the decision for the society, which is what adopted by countris with absolute monarchies.
