On the North's Anti-Slavery Statutes

Yeah, they really didn't free all that many slaves in that a) slavery had already started to wither in the North due to climate, industrialization, bigotry (the fact that the North was a profoundly racist region that didn't want blacks to be around, period; black codes, the colonization movement, etc.), etc. and b) the Northern slaveholders once they had learned about the impending laws simply sold their slaves to Southern interests while making a tidy profit. Oh yeah, the North was soooooooooooooo damned virtuous.