What was the main idea of rousseau's famous work "the social contract".

the language dates from the contacts of arabian traders with the inhabitants of the east coast of africa over many centuries. under arab influence, swahili originated as a lingua franca used by several closely related bantu-speaking tribal groups.

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast