The writer of this article is right in that the decisions were in large part economic in one way or another, which then evolved into a social system that took decades to remove themselves.
As for polygamy, it is the natural state of things when fathers do not protect their daughters and lust after the daughters of likeminded negligent fathers. The Mormons fell into that pit and have paid the price, and are still paying it.
And we will see the return of it when "same sex marriage" is codified into law.
Oh?
Could you elaborate a bit?