Britain banned slavery throughout the Empire in 1833 almost 70 years after the Declaration.
IMO the slaves were a pawn in a bigger game... by offering to free the slaves, the North was trying to divide the South and start an uprising to weaken them.
They may have agreed with the notion that slaves were people too, but it was a war time strategy to weaken the South and keep them part of the Union.
At the end of the day, wars are fought about resources... and tax dollars to the Republic were that resource.
Even so, before WWI the coal miners in Wales were little more than slaves.
Right Australia had it.
Correct. But you do not want to confuse these people with the facts or truth. The truth they will not believe. A lie they will.