Things change and they can change quickly. There was a program on TV the other day about the old rice plantations in South Carolina. I think the year 1822 was mentioned and they said at that time Georgetown County in South Carolina was the wealthiest county in the USA. Things are different now.
Of course, back then South Carolina was rich because it was hugely productive in terms of agriculture (the USA didn’t become prominent in industrial might until after the Civil War, spurred on by the development of the railroads). And it was one of the most important slaveholding states for that reason.