The Oxyrhynchus Epi-tome preserves a partial summary of this author's major work. A later writer championed free discourse and the conflict between upper and lower classes as 
The Oxyrhynchus Epi-tome preserves a partial summary of this author's major work. A later writer championed free discourse and the conflict between upper and lower classes as sources of liberty in republics in a treatise that is nominally a commentary on part of this author's major work. The Periochae is a summary of this man's major work, which draws on writings of Quintus Fabius Pictor and the other Annalists, and on Polybius. In that major work, this man's account of a siege includes the stories of Cloelia and Mucius Scaevola, who impress Lars Porsena, a king of the Etruscans. That work by this man closes with the death of Claudius's father Nero Claudius Drusus, and opens with the arrival of Aeneas's arrival in Italy.  For 10 points, name this historian whose Ab urbe condita is a 142-book history of Rome that inspired some Discourses by Machiavelli.
The Oxyrhynchus Epi-tome preserves a partial summary of this author's major work.
Livy or Titus Livius