How do you think the relative peacefulness of the Han era is related to its successful economy?

Yes, the relative peacefulness of the Han era is strongly related to its successful economy.

Explanation:

The Han era is considered among historians to be a golden era in Chinese history. During this era, China enjoyed relative stability, prosperity, and peacefulness. The reason is that the Han Emperor enjoyed legitimacy over the Chinese population thanks to the idea of the Mandate of Heaven, and he used this legitimacy to strengthen his rule.

The Han Emperor also had an "army" of bureaucrats who helped him in the administration of the state, and the levying of taxes.

The stability also led to the development of new technologies like papermaking, or rudder, and advances in sciences such as astronomy, medicine, and mathematics.