De Amicitia (Laelius on Friendship)

A dialogue set dramatically in 129 BC, in which the elder statesman Laelius recalls his friendship with the recently deceased Scipio Aemilianus to instruct his sons-in-law on the nature of true friendship. Written in the same period as De Officiis, which is addressed to Cicero's son Marcus rather than to Atticus, this dialogue is itself dedicated to Atticus and argues that genuine friendship requires virtue in both parties, cannot survive dependence on favors, and should never override moral duty, addressing directly the era's political betrayals in which former friends had taken opposite sides in civil war. Its warm, personal tone and practical maxims made it one of the most widely copied of Cicero's shorter philosophical works throughout the medieval and Renaissance schoolroom tradition.