What if the American Revolution really had been about slavery?

The 1619 Project was social science fiction, but without the American Revolution it might not have been

Around 2021 a strange meme went around a lot of American public school systems, namely that the American Revolution had been fought to preserve slavery. (My youngest kid went to one of these schools.) That was nonsense in 2019 and it’s nonsense today.

In a parallel universe, however, you could have gotten an American rebellion that really was about pres…