Practical political education
In contrast to other works (Plato), Aristotle is less keen on attracting and encouraging the next generation of philosophers and is instead more focused on the practical education of future political elites.
Structure of the book
Book I starts with the metaphysics of politics, while Book III and Book IV develop the idea of the regime (politeia), another one of the book’s central themes.
Layman
In Politics, Aristotle seldom uses jargon or specialized words because of his perspective on politics as a practical science meant to facilitate action and discussion (”appropriate to people in debates and assemblies, in courts of law, in council rooms”).
“What most distinguishes Aristotle is that his language is addressed emphatically to citizens and statesmen, not to other political scientiest or philosophers. It has a public orientation.”
“Man is by nature a political animal”
For Aristotle, the ability of individuals to use reason and speech to make moral judgments coupled with the natural existence of the polis leads to one important (and famous) conclusion: that “man is by nature a political animal.” The way individuals can achieve their true potential (telos) is by engaging in the political life of the polis (and can only be done within its confines).
“A person who is without a city must either be a beast or a God.”
Logos
For Aristotle, one of the defining features of a man (over an animal) is his ability to use logic, reason, and speech to distinguish between distinct moral categories, good and bad.
Another meaningful way in which logos is useful to Aristotle’s thesis is that it helps individuals form strong communal bonds given that they can distinguish outsiders and recognize other members of the polis.
Polis as natural
Aristotle inquires into the nature of the polis. For him, polis is the most developed way of coordinating people, but its genesis can be found in the base unit of life: the family. The way that one would arrive at the polis would entail various stages (family→ tribe→ village→ polis). Still, for Aristotle, it highlights his thinking on why the polis is a natural arrangement.
Against political universality
One important conclusion from Aristotle’s idea on what keeps the polis together (namely affection over rational calculation) is that it is virtually impossible to create a cosmopolis, a league of nations that seeks to encompass under its umbrella as many people as possible. It is often the case that the way to truly understand who the members of your community are is by having a common enemy against whom the polis rallies.