OK, so there were people-ish things without genuine children-of-God spirits living on the earth, hunting, raising crops, making tools, building cities, developing writing, creating art, and everything else that "real" people can do but they weren't really people because they didn't have spirits yet? Anatomically modern humans (AMH) go back about 200,000 years and were living in every ice free part of the planet starting at about 80,000 years ago and reaching the final destination, the most remote tip of the South America, by probably 14,000 years ago.
And then God plants two
real people in a garden in Missouri, then kicks them out again, and they start trying to catch up with what all of those non-real people that have been at it for millennia. In the meantime all of the non-real people, who are living everywhere on the globe except Antarctica by now, continue expanding and advancing socially and technologically, as do Adam and Eve's descendants, but with a huge head start.
So where does that leave us today? Am I a real child-of-God person or the other variety?
Jeffery Holland's
A Promised Land article:
https://www.lds.org/ensign/1976/06/a-promised-land?lang=eng that says there were no people before Adam and Eve and that the Americas were intentionally kept empty until the arrival of Jaredites/Lehites. Compare that to the DNA Gospel Topics essay that claims there were people in the Americas thousands of years before the biblical calendar started, which drowned out any potential DNA evidence of the Book of Mormon.
What a grade A can o' worms. Somebody's got some 'splainin' to do!