How did the rigidity of Brahmanism in India lead to the rise of Buddhism? Who among India's kings relied on Buddhism to guide and stabilize his empire and why did Buddhism fade in Indian society in the middle ages?

the mongolian invasion of china and central asia resulted in a disruption of the silk road as the chinese garrisons lost support from the chinese kingdoms which fell under the mongols. however, as the mongols established a formal dynasty in china, the successors of genghis khan restored the garrisons along the silk road allowing the safe travel caravans again.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

he sent troops to protect the students as they entered the school.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.