Brazil was not industrialized when it abolished slavery in 1888, or Cuba. They had way more slaves than the US, like 5% of Atlantic slaves camt to the US and the rest to Latin America. Slavery also wasn't dying in the US cause of industry in the North, the South was thriving very much with slavery.>>3722336
Slavery was pretty efficient with the way the US had done it.http://www.occidentaldissent.com/2012/09/16/free-labor-vs-slave-labor/
Other countries abolished slavery cause of the prices of slaves which had to do with the blockade of Africa and the laws banning the global slave trade effecting prices.
The dispute about slavery was one about morality, yes many who opposed it were racist against blacks but nevertheless thought they shouldn't be slaves. >>3722360>slaves can only do farm work
The Nazis used slaves in factories, American slaves also didn't work exclusively on farms.