The Comanche, for instance, moved from being a backwater tribe who couldn't do anything well, circa 1650, into being the dominant tribe in what roughly covers 2/3rds of west Texas, western Oklahoma and Kansas, large swaths of northern Mexico plus 2/3rds of eastern New Mexico and Colorado for the next two centuries.
They were avid polygamists as were most Native American tribes who lost a large part of their male population through constant warfare. It was a matter of necessity more than sexual gratification.
The Comanche were not very nice, to say the least, but most of the American southwest belongs to us and not Mexico because they kept the Spanish at bay for more than 150 years.
All of the generations of Jewish patriarchs from Abraham through Solomon's sons were also polygamists and the Bible isn't really clear on when the practice ended.
Not that I'm advocating it, just pointing out the the "wise Latina" at least has the sense to question where this grand experiment with marriage is going to end.
We are in agreement and your example of the Commanche is a very good one. I didn’t know that about them. What I mean is that polygamy as a word means married to many. Polygyny simply means a man married to more than one women. That’s the universal pattern. You don’t find oddball relationships like a woman married to more than one man, etc.