Volkstribun
Tiberius was elected to the office of Tribune of the Plebs in 133 BC. He immediately began pushing for a programme of land reform, partly by invoking the 240-year-old Sextian-Licinian law that limited the amount of land that could be owned by a single individual. Using the powers of Lex Hortensia, Tiberius established a commission to oversee the redistribution of land holdings from the rich to the unlanded urban poor. The commission consisted of himself, his father-in-law and his brother Gaius.