Why is the ability to build a consensus an important skill for a leader?

Why did trade along the silk road increase after it fell under mongol control? o people stopped using camels the mongols paved the road o it became safer to travel the mongols were better traders next question ask for

What change took place in the african slave trade in the 1500's?

What does portia compare a rumor to? how does she describe how the rumor is circulating? what is shakespeare's purpose in using this imagery?