A reminder: Grand Canyon blog though this is -- and I will get back to the Havasupai et al.-- I hope that some of this digression is useful in showing my view of what was, what we came from and are based in, to lay the basis for understanding what is and what is happening, and not just at the Canyon.
WE MIGRATE, ALL ACROSS THE WORLD, IN ALL ITS ENVIRONMENTS, ALL THE TIME, AS WELL AS DOWN INTO IT AND UP ABOVE IT. Migration is built into our genes as a survival technique, a positively selected-for characteristic of Homo sapiens as we evolved over the past 100-200 millennia. We searched for food, we gathered and hunted, and we moved about in order to maximize our chances of survival. There is everything human about the ability to pick up and move, to look for another herd of antelope or another patch of berries, to check out a more interesting residence across town, or a better job a few states away, or a life out of poverty half the Earth distant. We move, we travel, we tour about, we trade, we migrate. So, yes, the debate today over "migration" contravenes our very biological essence, but more on that later. First, there is something even more important, if not unique, about us, Homo sapiens.
WE MIGRATE IN OUR MINDS!! It is in our genetic, biological make-up that these brains (klutzy kludges as they are, according to neuroscientist David Linden's The Accidental Mind) of ours work as projectors and introjectors of the outside world; the world imprints our minds; we image the world. To do this, we have language & mind, curiosity & questioning, what-ifs & narrative/fantasy, and these capabilities made us the inventors of agriculture, ships, the electric light, and the iPad. And made us the migrators that took us out from Africa, and all across the world. So were we ferocious conquerors, beaters of chests, massive men dragging our women & children as we stomped across the new worlds, bellowing & conquering as we went? No way!