It is a normal, productive scientific controversy — one in which real evidence is being brought to bear on a genuinely difficult question, in which the competing models are being progressively constrained by accumulating data, and in which the eventual resolution will produce a more accurate picture of human prehistory than any of the models currently on the table.

The resolution is not yet available.

The data needed to definitively answer the remaining questions — specifically, ancient Beringian genomes from the period just before the American dispersal — does not yet exist.

But the scientific community is working toward it, using increasingly powerful tools and increasingly thoughtful methods, and there is reasonable confidence that the question will eventually be answered.

When it is, the answer will almost certainly be complicated.

It will involve specific population dynamics in specific times and places, ancestral diversity that was distributed in specific ways across the founding population, and a story of the first Americans that is more detailed, more specific, and more interesting than any simple summary can capture.