Aristotle is explaining the entire reality through two most abstract principles, form and matter. The matter that is in the state of motion is taking a concrete form, becoming an object, or in other words an idea with a purpose. The evolution of all ideas in the world is permanent, and since the beginning of history the matter is constantly falling, and the form is rising, making the entire world more perfect. The state is an idea in which the population and the territory are representing the matter, and the authority is representing the form, with a purpose of achieving pleasant life of citizens. Superior forms of authority are those aimed at achieving general interest, which by Aristotle are: kingdom, aristocracy and republic. Poor forms ...