„In the decade from the Declaration to the Constitution every state north of the Mason Dixon line, and north of the Ohio River, either abolished slavery or adopted measures leading to abolition.“
— Harry V. Jaffa American historian and collegiate professor 1918 - 2015
But in 1793 the cotton gin was invented, shortly after the power loom in England. This was the onset of the industrial revolution. Almost overnight, a new industry or rather a series of new industries, proliferating worldwide, was born. It began with the growing of cotton but was followed by its manufacture into a wide variety of products, especially cotton cloth and cotton clothing. Suddenly, slave labor became vastly more profitable. In the decade before the Civil War, the value of slaves doubled. Once again, greed overwhelmed all other motives. From being regarded as a temporary evil, as it was at the founding, slavery came to be regarded as a positive—and permanent—good.
2000s, God Bless America (2008), Slavery and the American Cause