Ways in which the Mongol Empire sustained rule through trade and communication?

The Mongols relied on trade and on diplomatic exchanges to strengthen the empire. To that end, Mongol officials gave diplomats a paiza, an engraved piece of gold, silver or bronze to show their status.

the american revolution was by the middle and upper class, and the french was by the lower and middle class.

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.