What was one reason why Rome was a great empire?

One reason Rome was a great empire was its innovative governance and legal systems, which established a framework for administration and justice that promoted stability and unity across diverse cultures. The Pax Romana, a period of relative peace and prosperity, facilitated trade, infrastructure development, and cultural exchange, further solidifying Rome's influence. Additionally, Rome's military prowess allowed it to expand and protect its vast territories, ensuring its dominance in the ancient world.