The Nicomachean Ethics is the Aristotle's best-known work on ethics. The work, which plays a pre-eminent role in defining Aristotelian ethics, consists of ten books, originally separate scrolls, and is understood to be based on notes from his lectures at the Lyceum. The theme of the work is a Socratic question previously explored in the works of Plato, Aristotle's friend and teacher, of how men sh...