That all being said, there was vast social distances that separated elites and commoners. Even in the city of Rome, most of the citizens lived in squalor, packed into apartment buildings many stories high, made out of flammable wood, looming over open sewers. The rich lived in a state of luxury that probably would not be equaled until the Renaissance, but the majority of Romans lived in squalid conditions.
Most people in the empire were, of course, poor farmers; only a minority of the imperial population lived in cities. Peasants sometimes joined the army, but most were simply poor folk struggling to get by. They were seasonal laborers, they rented from wealthy landowners, or they owned farms but were perpetually threatened by the predatory rich. Over the centuries, poor farmers found it more and more difficult to hold on to their land, both because they could not compete with the enormous, slave-tilled plantations of the rich and because of outright extortion. There are numerous accounts of rich landowners simply forcing small farmers off of land and seizing it; the peasants could not afford to battle the rich in court and the rich had few scruples about hiring thugs to terrify the peasants into submission. Once in a great while, a poorer Roman citizen could petition an emperor personally for redress and succeed, as could the occasional provincial to a governor, but the immense majority of the time the poor (citizen and non-citizen alike) were simply at the mercy of elite landowners.
One percent of the population of the empire were members of the aristocracy, those men who were allowed to participate as officials in the imperial government and their families. In turn, access to political power was explicitly linked to wealth, a system first introduced by Augustus himself. To serve in the imperial senate required an annual income of 1,000,000 sesterces (the basic coin of the empire). To serve on the governing council of a small city or town required an annual income of 100,000 sesterces. Meanwhile, a typical soldier earned about 1,200 a year, and poor farmers much less. Land ownership was by far the major determinant of wealth, and with the prevalence of slavery, economies of scale dictated that the more land a given family controlled, the more wealth they could generate.
The overall pattern in the Roman Imperial period is that the wealthy were highly successful in becoming richer from generation to generation, at the expense of the rest of Roman society: the wealth of elite landowners grew approximately eight times from 1 CE to 400 CE, with almost no new wealth coming into the Roman economy during that period. Thus, as a whole, social mobility was so limited as to be almost nonexistent (to cite a single example, a member of the equestrian class in the Empire might have about 17,000 times the annual income of a poor laborer). Roman elites kept taxes on their own property low, but the provinces were often ruthlessly exploited and overall tax levels were high. The immense majority of Roman citizens and subjects were born into the social class they would stay in for their entire lives regardless of their own intelligence and competence.
Still, while they might prey on poor farmers, elite Romans were well aware of the threat posed by destitute city-dwellers. Thus, one striking characteristic of the Imperial period was "bread and circus government." Building on a precedent originally established by the Gracchi during the Republic, the imperial state distributed free grain (and, later, wine and olive oil) to the citizens of the city of Rome. Eventually, other Roman cities adopted the practice as well. In addition, public games and theater performances were free, subsidized by the state or by elites showing off their wealth (the most popular were circuses: horse races around a track). Thus, a Roman citizen in one of the large cities could enjoy free bread and free entertainment. This policy was both a cynical move on the part of the state to keep down urban unrest and a legal right of urban citizens. Free bread or not, the average life expectancy was 45 years for men and 34 for women, the latter because of the horrible conditions of bearing children.