Wealthy noble families exacerbated the sharpening divide between rich and poor. As they looked to invest their newly acquired riches, they found thousands of dilapidated plots just waiting to be scooped up. Sometimes destitute families sold willingly, happy to get something for property they could no longer afford to work for themselves. But holdouts were often bullied into quitting their land. As these newly acquired small plots combined into larger estates, the Roman agricultural landscape began to transform from small independent farms to large commercial operations dominated by a few families.11
The plight of the dispossessed citizens might not have been so dire had they been allowed to transition into the labor force of the commercial estates. But the continuous run of successful foreign wars brought slaves flooding into Italy by the hundreds of thousands. The same wealthy nobles who bought up all the land also bought slaves to work their growing estates. The demand for free labor plummeted just as poor Roman families were being pushed off their land. As the historian Diodorus observed: “Thus a few men became extremely rich while the rest of the population of Italy grew weak under the oppressive weight of poverty, taxes and military service.”12
Tiberius first confronted the new economic realities early in life. According to a pamphlet written later by his brother, “Tiberius was passing through Tuscany, and observed the dearth of inhabitants in the country, and that those who tilled its soil or tended its flocks there were barbarian slaves.” According to Gaius this was the moment Tiberius first seriously confronted the need for economic and social reform. This apocryphal story is no doubt a fine piece of exaggerated propaganda, but it captures the essential dislocation of the poor families from their traditional way of life.13
Some of these dislocated citizens migrated to the cities in search of wage labor, only to find that slaves monopolized the work in the cities, too. So most remained in their rural homelands, forming a new class of landless peasants who would continue to work their land as mere tenants and sharecroppers rather than owners. Their new landlords loved the arrangement—tenant farmers could be used to produce low-margin cereals, which would allow landlords to save their slaves for more lucrative crops like olives and grapes. Politically minded landlords had an added incentive to promote tenancy: these peasants remained political clients whose votes could be counted on in the Assembly. This new breed of poor tenant-farmers would be tied to their landlords forever unless someone came along and offered them a way out.14
EXACERBATING THIS ECONOMIC and social dislocation was the Spanish quagmire the Romans had gotten themselves stuck in. When Carthage and Corinth fell in 146, Roman power seemed invincible, but Roman commanders in Spain had indulged in greedy atrocities that continued to provoke stiff resistance from the Spanish natives. So each year the Senate was obliged to raise new recruits and ship them off to the Iberian Peninsula, to serve on campaigns of undefined length against an enemy who specialized in demoralizing skirmishes. As a reward for their service these conscripts would come home to find their farms ruined.15
While the unpopularity of the Spanish wars grew, potential conscripts began to defy the consuls. With no other recourse, they once again turned to the tribunes for protection. The tribunes were the ancient guardians of the plebs, but over the past century they had been co-opted by the Senate. With citizens once again suffering under the arbitrary whims of the nobility, the tribunes returned to their sacred mandate of protecting the people from abuse. In both 151 and 138, aggressive conscription by the consuls climaxed with tribunes placing the consuls under arrest until they backed off. The tribunes had every right to throw the consuls in jail, but it was still a shocking challenge to noble authority.16
The Senate attempted to mollify potential conscripts by making life in the army a little less harsh. They capped service at six years and gave soldiers the right to appeal punishments handed down by their officers. But ultimately, this did little to improve the morale of the legionaries in Spain. In 140, veterans who had served six years were mustered out and replaced by raw recruits. These new soldiers were “exposed to severe cold without shelter, and unaccustomed to the water and climate of the country, fell sick with dysentery and many died.” Not exactly something you can put on a recruitment poster.17