They rebelled against his policies
The main responsibility of the United States State department is to handle foreign affairs.
The Black Death killed millions of millions of people which lowered the population
The fall of the Mauryan Empire is closely related to the death of Emperor Ashoka. After he passed away, the empire had trouble controlling their financial and economic issues. They also did not have the correct military to protect their empire, so this is how the empire fell.
B. The appeal of freedom and the containment of Communism