Why would it differ from the UK, when the Colonies were chartered by the Crown, they used British Law, they paid the Crown for materials/supplies/taxes and the Governors were employed by the Crown? Just about everything in the colonies was modeled after the British system until they reached the point of rebellion from being taxed for things that didn't involved them (like the wars GB was fighting on other continents). Slavery didn't start here, it was brought here and it existed before British colonists came here.
I think you missed my point.
@SithZedi suggested that we might grant some leeway to the founders for not having banned slavery in the original version of the constitution, because they were essentially re-inventing the republican wheel after a millennium of absence, which is not accurate.
This is an unfortunate and erroneous view of history. If you read the Federalist papers you will know the founders deeply struggled with slavery. They could not help the world as it was in 1783. They were incorporating the first republic in 1,000 years so defacto almost all "white" people were subject to either a monarch or tribal leader in 1783. They were not slaves but their liberty and freedom was severely restricted.
And, "They were not slaves but their liberty and freedom was severely restricted" implies that white people lived some mediaeval serf-like existence, which is far from the truth, especially in Great Britain. The democratization of GB was - of course - far more gradual than in the US, but commoners had far more rights than one might think. Habeus Corpus was enacted in 1679 and a Bill of Rights in 1689.
If the founding fathers had truly wished to establish a clear separation in the degree of democracy when compared with GB, they would have banned slavery from the start.
The colonists certainly had legitimate beefs with the crown, but some of the reasons for the revolt were BS.
Being taxed for wars that didn't involve them? Well, the Seven Years (French and Indian) War certainly involved them. It determined the fate of the American and Canadian colonies*. If the French had won, it could have led to a continent dominated by the French, never mind the British Crown.
The Canadian colonies were subject to the same taxes, but didn't feel it necessary to throw a fit over.
The British government tried to maintain peace with the Indigenous peoples by restricting further expansion of the colonies, while many colonists didn't care a whit about them and didn't like being told that they couldn't take any more Indigenous land.
*They weren't known as such at the time. They were simply 17 individual colonies in North America - 13 that became part of the US and 4 that are now part of Canada.
My central point is - if the founding fathers had
truly wanted to end slavery, they could have.