It keeps prices low, and it limits the amount of agricultural a country allows, and specialization allows people to do a more efficient job at producing it. Hope this helped:)
It would be described as Battle of the Atlantic, in World War II, a contest between the Western Allies and the Axis powers (particularly Germany) for the control of Atlantic sea routes. For the Allied powers, the battle had three objectives: blockade of the Axis powers in Europe, security of Allied sea movements, and freedom to project military power across the seas.
They had to face slavery, and whites had the authorities that colored people didn't.
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I believe it's Niccolò Machiavelli. I hope that helps? :)