It's not as if Americans were abolitionists until the cotton gin was invented. The justification of slavery was already there. The institution of slavery grew d

It's not as if Americans were abolitionists until the cotton gin was invented. The justification of slavery was already there. The institution of slavery grew due to the cotton industry, but those people already had the justification they needed. They knew the Bible didn't condemn slavery and they had God on their side. Abolition spread in spite of the economic demand for slavery.