Why were textile mills so common in South Carolina at the start of the 20th Century?

In South Carolina, textile factories generated a MILESTONE in the history of cotton, since the United States in South Carolina was one of the main consumers of British cotton.

In 1789, the congress of the newly independent United States imposed a tariff of 3 cents per pound to incentivize the return of Loyalists from South Carolina and Georgia who had been exiled in the Bahamas after the United States War of Independence. , where they had established cotton plantations Sea Island (a variety of the gossypium barbadense). This was a long fiber variety that had been cultivated since the colonial period in South Carolina and Georgia but had had poor results in the subtropical interior areas. Other varieties had been better for cultivation, but the grain of these was difficult to separate from the fiber, so the utility of the cultivation was reduced.

Explanation:

The new plantations were carried out by slaves, while the British made a treaty, called the London Treaty of 1795, which prohibited cotton imports from the former colonies, even though the Haitian revolt of 1791 was causing shortages of the material prima in the nascent textile industry. The US Senate demanded that this article be amended, which led to criticism of the editor John Jay and a political change that led to the Quasi-War against France.

i think its the outcome of people's preferences.

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."