While the North promoted an increase in manufacturing, the South promoted an increase in agriculture. “The poor could in two or three years, without any help, become rich” because they would find good agricultural land and “sell their information to those who were too idle or too rich to bear the trouble of seeking it.” The land would then become a plantation and slaves would be brought in to work it. “More than 6,000 Negroes…were sold in Yazoo County alone.” To make more money, the South wanted to continue expanding slavery. This increased tensions between the North and the South. The North had eventually abolished slavery and wanted to end slavery while the South tried to expand it to make more money. This leads to several conflicts over the issue of slavery and whenever the South, especially South Carolina in the beginning, felt that the institution of slavery was threatened, they threatened to secede if they didn't get what they wanted. This would lead to civil war as the North would finally stop compromising with the South on the issue of slavery. America changed greatly during the antebellum period. Before, it was completely united as a nation and economically it was a little behind the European nations. During the antebellum period, however, America was beginning to catch up with Europe economically, and divisions between the Northern states and the Southern states began to appear. The changes brought about by the antebellum period eventually led to the secession of the Southern states from the Union and the beginning of the Civil Period.