Answer:
economy.
Explanation:
In 133 BC, the turmoil within Rome's economy proved dangerous for the Republic's stability.
With the growing economy of Rome, the gap between the rich and poor of Rome grew. With this growing gap, grew tension and turmoil within Rome. At that time stood two brothers, Tiberius and Gaius Gracchus, to stand for poor farmers of Rome, but were killed. This growing tension in the economy provoked slave revolts and military precipitation in Rome which resulted in the Fall of the Republic.
Judging from your other questions, I would guess the Aztecs, because they had an extremely advanced civilization relative to their time period. However, you might want a second opinion to verify this. Hope this helps.
Themselves they work for the rich people and the barbarians the rich people
