Tiberius Gracchus in the context of Scipio Aemilianus Africanus

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.

Publius Cornelius Scipio Africanus Aemilianus (185 BC – 129 BC), known as Scipio Aemilianus or Scipio Africanus the Younger, was a Roman general and statesman noted for his military exploits in the Third Punic War against Carthage and during the Numantine War in Spain. He oversaw the final defeat and destruction of the city of Carthage. He was a prominent patron of writers and philosophers, the most famous of whom was the Greek historian Polybius. In politics, he opposed the populist reform program of his murdered brother-in-law, Tiberius Gracchus.

A lex agraria (pl.: leges agrariae) was a Roman law which dealt primarily with the viritane allotment of public lands. Such laws came largely from two sources: the disposition of lands annexed by Rome in consequence of expansion and the distribution of existing public lands to poor citizens as freeholds. Such legislation dealt almost exclusively with public lands which were held by the state and not privately owned. There were other types of Roman laws related to agriculture, including those establishing new colonies and those regulating the holding of public lands (lex de modo agrorum).

The most famous lex agraria was that of the plebeian tribune Tiberius Gracchus, passed in 133 BC, which allotted public lands across Italy to rural plebs. Such laws were not without precedent, such as the lex Flaminia of 232 BC which authorised viritane distributions of lands in Cisalpine Gaul and Picenum. Further such laws were also passed in the years after 133 BC, including that of Tiberius' younger brother Gaius in 122 BC, and the epigraphically attested lex agraria of 111 BC. The law of 111 BC, among other things, buttressed recognition of the lands distributed in the prior law of 133. Other leges agrariae include a series of three laws vaguely described by Appian, the laws of Saturninus in 103 and 100 BC, the laws of Julius Caesar in 59 BC, and a law of Mark Antony in 44 BC.

Publius Mucius Scaevola (c. 176 BC – c. 115 BC) was a prominent Roman politician and jurist who was consul in 133 BC. In his earlier political career he served as tribune of the plebs in 141 BC and praetor in 136 BC. He also held the position of pontifex maximus for sixteen years after his consulship. He died around 115 BC.

Scaevola was consul at the time of Tiberius Gracchus' tribuneship and murder, and was heavily involved in reconciling the Senate following Gracchus' death. According to Cicero, Scaevola supported Gracchus' land reforms (Lex Sempronia Agraria), but the extent of his involvement has been debated by some historians.

Tiberius Sempronius Gracchus (c. 220 BC – 154 BC) was a Roman politician and general of the 2nd century BC. He served two consulships, one in 177 and one 163 BC, and was awarded two triumphs. He was also the father of the two famous Gracchi brothers: Tiberius and Gaius.

During his tribunate in 187 or 184 BC, he interceded to save Scipio Africanus or Scipio Asiagenes from prosecution or prison, feeling that their services to the republic outweighed any alleged wrongdoing. He later married Africanus' daughter, Cornelia, after Africanus' death. A few years later, Tiberius was elected praetor and prorogued pro consule to Spain; he won victories there for which he was awarded a triumph. After his first consulship in 177 BC, he was assigned to Sardinia and on his return triumphed for the second time. In 169 BC, he was elected to the censorship and began construction of the Basilica Sempronia in the forum; he later won a second consulship in 163 BC.