What role do the spirits play in the tragic downfall of macbeth in the tragedy of macbeth, act v, by william shakespeare?

(D) Macbeth thinks that Macduff can never harm him because he was born a woman.

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.