I don’t believe I am ignoring the political realities. The way I see it, slavery was a hotly contested political issue in America at the time. In another comment of yours in this thread you mention “the exclusions that were made with defaults” but I see no evidence that these were truly the defaults in the way that, eg slavery in ancient Greece (my knowledge of Ancient Rome is fairly basic so I can’t comment on that) was a default that few if any members of the polis questioned. The framers of the constitution absolutely inhabited a moral world in which it was possible to denounce slavery for the abomination it was.