Gaius Sallustius Crispus, usually anglicised as Sallust (ˈsæləst, ; 86 – 35 BC), was a Roman historian and politician from an Italian plebeian family. Probably born at Amiternum in the country of the Sabines, Sallust became a partisan of Julius Caesar (100 to 44 BC), circa 50s BC. He is the earliest known Latin-language Roman historian with surviving works to his name, of which Conspiracy of Catiline (on the eponymous conspiracy), The Jugurthine War (on the eponymous war), and the Histories (of which only fragments survive) remain extant. As a writer, Sallust was primarily influenced by the works of the 5th-century BC Greek historian Thucydides. During his political career he amassed great and ill-gotten wealth from his governorship of Africa.
Sallust was probably born in Amiternum in Central Italy, though Eduard Schwartz takes the view that Sallust's birthplace was Rome. His birth date is calculated from the report of Jerome's Chronicon. But Ronald Syme suggests that Jerome's date has to be adjusted because of his carelessness, and suggests 87 BC as a more correct date. However, Sallust's birth is widely dated at 86 BC, and the Kleine Pauly Encyclopedia takes 1 October 86 BC as the birthdate. Michael Grant cautiously offers 80s BC.
There is no information about Sallust's parents or family, except for Tacitus' mention of his sister. The Sallustii were a provincial noble family of Sabine origin. They belonged to the equestrian order and had full Roman citizenship. During the Social War Sallust's parents hid in Rome, because Amiternum was under threat of siege by rebelling Italic tribes. Because of this Sallust could have been raised in Rome. He received a very good education.
After an ill-spent youth, Sallust entered public life and may have won election as quaestor in 55 BC. However, the evidence is unclear; some scholars suggest he never held the post. The "earliest certain information" on his career is his terms as plebeian tribune in 52 BC, the year in which the followers of Milo killed Clodius.