Why was the Roman Empire the center of the ancient world

Founded on the banks of the Tiber river in 753 B.C., according to legend, by Romulus and Remus, Rome was first the centre of the Roman Republic, then of the Roman Empire, and in the fourth century, became the capital of the Christian world. Ancient Rome was followed, from the 4th century on, by Christian Rome.

Explanation:

a case involving the laws of a single state.

the government closely monitored its finances to avoid another financial collapse.