According to rousseus's social contract, where does the power rest?

In the supreme court’s decision in korematsu v. united states, the court said that korematsu

In italy, the distance between milan in the north and palermo,sicily, in the south is about 550 miles. in the united states, the distance betweenboston, massachusetts, and savannah, georgia, is about 900 miles. do you think the american revolutionaries of 1776 in the 13 colonies faced some of the same challenges as the patriots who struggled for italian unity in the 1860s?  

Which best describes the impact of the crusades on european exploration?