He and his brother, Gaius Sempronius Gracchus (c. 153–121bc), were responsible for radical social and economic legislation, passed against the wishes of the senatorial class. Tiberius was killed by his opponents after the passing of his agrarian bill (133 bc), which aimed at a redistribution of land to the poor. Gaius continued his brother’s programme and instituted other reforms to relieve poverty, but was killed in a riot.