This seems a better place than elsewhere to report a small new item on my American history site: a transcription of a journal article in the Catholic Historical Review (October 1917), “Origin of American Aborigines: A Famous Controversy”.
The paper is not so much about the origin of the native peoples of the American continent as about the quarrel between two eminent 17c Dutch savants. In the author’s view, the less-known De Laet (whose geographical work places him, however, among the top scientists of his time in that field) comes out on top, for both his historical insight and his personal and professional courtesy.
That said, the various theories then held about where the American peoples might have come from do get enumerated; and all the candidates still in the running today — for genetic studies haven’t completely settled the question — were already being discussed, with here and there some surprisingly modern arguments (Acosta on animal migration, De Laet on linguistic drift).
The paper is of additional interest in that it touches on Dutch religious controversies, which the principals themselves more than hint at: Catholic vs. Protestant — although the writer could have dug more and presented a more interesting and affirmative result.