What were some of the most important factors that contributed to the decline of the Roman, Han and Gupta empires?

Answer

1. Nomadic invaders sacked and destroyed property within the empire

2. New religions replaced those of the people in the empire.

a punishment or the threat of punishment used to enforce conformity. enforcement of norms or shared rules of conduct that tell people how to act in specific situations. social control. not everyone internalizes all of society's norms, and some people must be motivated by self-fulfillment.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.