School books ain't written in stone their is a lot of shit they left out or downright lied about, did they teach you that we would have never sailed to the Americas for many many years if their was no hemp? Hell no, it don't fit in their current agenda they don't burn books just replace them.
Now I'm not sure about slaves but their damn sure where Irish indentured servants which are pretty much slaves, sure some Irish where free men working the railroads and doing all kinds of shit work, Dead Rabbits in NYC etc.
Also they claim the Civil War was all about slavery but their was a bit more to the story sure slavery was a big reason but not the only. Look at us now you work at any minimum wage job your damn near a slave you can't raise a family you need foodstamps and all just to barely survive on minimum wage your not eating rib-eye steak or drinking good alcohol, not taking the family to Disney World (or Land for you west coasters) lol.
But give it 20+ years we will all be fucked them fools already got AI some robots eventually they will take our jobs slowly makes you almost wish weeds never legal get a crew of robots to copy the best growers where fucked. lol Them things will work, work, and work more than any human 24/7 hopefully they can never build a real good robot but yeah, after seeing some military shit makes you wonder, the fuck they got in Area 51 and shit? All we can hope for is the fall of the empire but fuck it I'll probably be dead before it gets really bad.