What were some ways that the five “good emperors” helped Rome to become rich and prosperous?

Nerva's reign began the Nervan-Antonine Dynasty, which included what history calls the Five Good Emperors. In order of their reign, they were Nerva, Trajan, Hadrian, Antoninus Pius, and Marcus Aurelius. First, the Five Good Emperors brought relative peace, stability, and prosperity to Rome.

Explanation:

East Asia is home to approximately 25% of the world's population.