This publication examines the life and work of Marcus Tullius Cicero, an influential Roman statesman, lawyer, and philosopher. The reference work offers an in-depth analysis of Cicero’s philosophical corpus and his contribution to rhetoric, law, and politics in the late Roman Republic. Thanks to a collection of nearly 1,000 letters, the reader gains insight into how the Roman elite functioned and into Cicero’s personal vulnerabilities. The authors also highlight the elemental-particle character of his legacy and the enduring afterlife of his work. A valuable study book for anyone interested in Tullius Cicero and his impact on political and legal philosophy.