I believe that the answer to the question provided above is because of industrial revolution US shipping industry flourish in the late 1700's
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It further aims to build and maintain a single national identity, based on shared social characteristics of culture, ethnicity, geographic location, language, politics (or the government), religion, traditions and belief in a shared singular history, and to promote national unity or solidarity.
Perhaps the greatest shortcoming of the Progressive movement was that it lacked any real political prowess, since most in Congress were the very corrupt people the movement itself was trying to overtake.
The answer will beThe trade began due to a surplus of each product per area. Gold was plentiful in West Africa so traders sent the item to North Africa so they too could have the valuable mineral. In return, North Africans gave salt to West Africa. hope this helps
