Political factions have existed in democratic societies since ancient times. Plato writes in his Republic on the formation of political cliques in Classical Athens, and the tendency of Athenian citizens to vote according to factional loyalty rather than for the public good. In the Roman Republic, Polybius coined the term ochlocracy (literally, 'rule of the mob') to describe the tendency of politicians to mobilize popular functionalist sentiment against their political rivals. Factional politics remained a part of Roman political life through the Imperial period and beyond, and the poet Juvenal coined the phrase "bread and circuses" to describe the political class pandering to the citizenry through diversionary entertainments rather than through arguments about policy. "Bread and circuses" survived as part of Byzantine political life - for example, the Nika revolt during the reign of Justinian was a riot between the "Blues" and the "Greens"—two chariot racing factions at the Hippodrome, who received patronage from different Senatorial factions and religious sects. The patricians who sponsored the Blues and the Greens competed with each other to hold ever grander games and public entertainments during electoral campaigns, in order to appeal to the citizenry of Constantinople.