Ηθικά Νικομάχεια, Τόμος Πρώτος

The work investigates what constitutes the human good, arguing that happiness is the highest end and is realized as a lifelong activity of the soul in accordance with virtue. It distinguishes moral and intellectual virtues, explains moral virtue as acquired through habituation and as a mean between extremes, and explores the roles of external goods, honor, and pleasure in a flourishing life. It analyzes voluntary action, choice, and responsibility and offers criteria for practical deliberation. It also treats social dimensions such as justice and friendship, using analytic definition, ethical psychology, and teleological reasoning to link character, actions, and communal life.