Can you elaborate on the contradiction between the two economic systems in the United States before the Civil War?

During the American War of Independence, the capitalist industrialists in the north and the slave owners in the southern plantations jointly resisted the British colonial rule and won, which played a role in the United States embarking on an independent capitalist road. However, due to the differences between the two economic systems (slavery and capitalism), the American Civil War broke out in the 1960s from 65438 to 2009. How did two different economic systems in the United States lead to this war step by step?

After the American War of Independence swept away the external obstacles in the process of capitalist development, the plantation economy in the south and the capitalist industry in the north developed along their own paths for decades.

Since the industrial revolution began in the cotton textile industry, the world's demand for cotton has greatly increased. In order to produce more cotton, the southern plantation owners began to expand actively, which made the slave economy of the southern plantation develop greatly. At that time, the European cotton textile industry relied almost entirely on the United States to supply cotton. In the north, the capitalist industrial and commercial economy developed rapidly. By the middle of19th century, the industrial and commercial level of the United States ranked fourth in the world after Britain, France and Germany.

Due to the different economic interests, with the development of economy, the contradiction between North and South has become increasingly acute. On the one hand, the north needs the south to supply sufficient industrial raw materials; Secondly, the north needs a vast product market in the south to sell industrial products produced in the north; Furthermore, the capitalists in the north hoped to liberate slaves to expand the free labor force. For the south, in order to obtain greater economic benefits, they are more willing to sell cotton and other industrial raw materials abroad, and are more willing to buy cheap British goods. At the same time, the southern planters also hoped that there would be more black slaves to develop their own plantations.

After independence, the United States quickly expanded its territory to the Pacific coast by means of war, armed subversion or low-cost redemption. In the "Westward Movement", the planters in the south hoped to turn the newly-added land and even the whole country into slave-holding states, while the industrial and commercial bourgeoisie in the north hoped to form a broad domestic market in the west and develop the capitalist economy. In this way, the "westward movement" further intensified the contradiction between the North and the South, and the issue of slavery became the focus of the struggle between the two sides.

1860, * * and Lincoln, who shouted "Never give another inch of new land to slave owners", were nominated as American presidential candidates. Lincoln's election meant that the capitalist industrial and commercial economy in the north prevailed, and the slave owners in the southern plantations obviously felt the imminent threat, so it was imperative to abolish slavery. When history marched here, the contradiction between the two economic systems had reached the point where it could not be solved without war.