Before the Fall of the Roman Republic, Income Inequality and Xenophobia Threatened Its Foundations (smithsonianmag)
"At the same time, these wars of conquest were making the poor quite a bit poorer. Roman citizens were being hauled off to Spain or Greece, leaving for tours that would go on for three to five years a stretch. While they were gone, their farms in Italy would fall into disrepair. The rich started buying up big plots of land. In the 130s and 140s you have this process of dispossession, where the poorer Romans are being bought out and are no longer small citizen owners. They’re going to be tenant owners or sharecroppers and it has a really corrosive effect on the traditional ways of economic life and political life. As a result, you see this skyrocketing economic inequality. "