Of Aristotle’s works, few have had as lasting an influence on subsequent Western thought as The Nicomachean Ethics. In it, he argues that happiness consists in “activity of the soul in accordance with virtue,” defining “virtue” as both moral (courage, generosity, and justice) and intellectual (knowledge, wisdom, and insight). Aristotle also discusses the nature of practical reasoning, the different forms of friendship, and the relationship between individual virtue and the state. Featuring a lucid translation, a new introduction, updated suggestions for further reading, and a chronology of Aristotle’s life and works, this is the authoritative edition of a seminal intellectual masterpiece.