The origin of the African-American problem

At the time of the rise of capitalism, all capitalist countries were expanding their colonies, and evil triangle trade appeared, so blacks came to Europe and America and distributed in various countries. After the founding of the United States, the capitalist economy has been developing, but the economic systems in the north and south of the United States are different. The south is slavery, and the north is employment. Later, due to colonial expansion, the territory of the United States was increased. On the colonial economic system, the two sides have been arguing endlessly, and then a large number of blacks fought.