What does the reign of tiberius demonstrate about roman government?

Beginning in the eighth century B. C., Ancient Rome grew from a small town on central Italy's Tiber River into an empire that at its peak encompassed most of continental Europe, Britain, much of western Asia, northern Africa and the Mediterranean islands. It took two men to wrestle Rome back from chaos and turn a republic into an empire. In the first century BC, Rome was a republic. Power lay in the hands of the Senate, elected by Roman citizens. But the senators were fighting for power between themselves.