-In 1790 there were six slave states; in 1860 there were 15 -From 1790 until Congress banned the importation of slaves from Africa in 1808, Southerners imported 80,000 Africans. -By 1860 approximately one in three Southerners was a slave Which event played the GREATEST role in creating these conditions in the South during the Antebellum era?

The invention of the cotton gin.

Explanation:

The South being favourable to the climate depended on agriculture. Before the invention of Cotton Gin, cotton production remains limited to slaves. With the coming of Cotton Gin by Eli Whitney in 1793, it reduced the time and labour by removing seeds from the fibres. It increased the need for slaves in the plantations for cultivating cotton and picking the cotton fibres in fields. Cotton cultivation became beneficial for the cultivators. Many of the states in America began to emerge as slave states as the cotton production turn out to be profitable.

the first historical instance of china engaging in internationalism was during the han dynasty.[1] at the start of the han dynasty, the huns in the north were attacking the frontiers of han and trying to obtain riches. emperor wu of han wanted to gain an alliance with a country called dayuezhi so the two countries could join together and fight against the huns.[2] to obtain this alliance, emperor wu sent zhang qian to the west to establish economic and cultural connections.[2] history records that during the han dynasty there were four primary avenues of contact between china and europe. they included the northern land route, the central land route, the southern sea route, and the far southern sea route.[1] the most famous of these routes is the central land route, or the classical silk road, comprising a network of roads stretching from northwest china to the ports of syria and the black sea, which passed through the oasis of the turkestans and northern persia.[1] the silk road was significant for chinese emperors because it provided dominance over central asia by developing resources and provided new markets for the export of china's most valuable resources.[1]