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A reading list that Jefferson first drafted in 1771, five years before he wrote the Declaration, provided an answer. Jefferson sent the list to his friend Robert Skipwith, who had asked for books to include in a private library, and revised it over the years. Under the category of “religion,” Jefferson’s reading list includes Cicero’s Tusculan Disputations, as well as a top ten list of other works of classical and Enlightenment moral philosophy:11 Locke’s Conduct of the Understanding in the Search of Truth. Xenophon’s memoirs of Socrates, translated by Sarah Fielding. Epictetus, translated by Elizabeth Carter. Marcus Aurelius, translated by Collins. Seneca, translated by Roger L’Estrange. Cicero’s Offices, by Guthrie. Cicero’s Tusculan questions. Ld.
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Jeffrey Rosen (The Pursuit of Happiness: How Classical Writers on Virtue Inspired the Lives of the Founders and Defined America)