The Gracchi brothers were two brothers who lived during the beginning of the late Roman Republic: Tiberius Gracchus and Gaius Gracchus. They served in the plebeian tribunates of 133 BC and 122–121 BC, respectively. They have been received as well-born and eloquent advocates for social reform who were both killed by a reactionary political system; their terms in the tribunate precipitated a series of domestic crises which are viewed as unsettling the Roman Republic and contributing to its collapse.
Tiberius Gracchus passed legislation which established a commission to survey Roman public land, reassert state claims to it, and redistribute it to poor rural farmers. These reforms were a reaction to a perceived decline in Italy's rural population. A decade later, Gaius Gracchus' reforms, among other things, attempted to buttress Tiberius' land commission and start Roman colonisation outside of Italy. They also were far more broad, touching on many topics such as assignment of provincial commands, composition of juries for the permanent courts, and letting of state tax farming contracts. Both brothers were killed during or shortly after the conclusion of their respective tribunician terms.