Politics
The word comes from the same Greek word from which the title of Aristotle's book "Politics" (Πολιτικά, "Polis") also derives; "polis" means "affairs of the cities". The book title was rendered in Early Modern English in the mid-15th century as "Polettiques"; it became "politics" in Modern English. The singular "politic" first attested in English 1430 and comes from Middle French "politique", in turn from Latin "politicus", which is the Latinization of the Greek πολιτικός ("politikos"), meaning amongst others "of, for, or relating to citizens", "civil", "civic", "belonging to the state", in turn from πολίτης ("polites"), "citizen" and that from πόλις ("polis"), "city".
Harvey Mansfield
In his 2001 book "A Student's Guide to Political Philosophy", Mansfield traces the history of political philosophy in "the great books" written by Plato, Aristotle, Locke, Rousseau, and others of the "highest rank" (1). He also finds political philosophy in practical politics, which Mansfield considers necessarily partisan, because it involves citizens "arguing passionately pro and con with advocacy and denigration, accusation and defense" (2). He argues that politics does not merely consist of liberal and conservative options, but rather, they are fundamentally opposed to each other, with each side defending its own interest as it attempts to appeal to the common good (2). Since such adversarial sides in a political dispute appeal to the common good, an observer of the dispute can use his capacity to reason to judge which side supplies the most compelling arguments. If such an observer is competent to be a judge, he or she may be thought of as a political philosopher, or as at least on the way to engaging in political philosophy (2–3).