Ok my questions is how do you expect any man to reasonably provide for such a family? Where will the rather large needed family income come from? Where in this nation could such an arrangement work? Putting the women to work in the work force? No becuase the mom needs all her strength just for her own kids & without adding plus others to raise as well which would have to happen. {A down fall of working mom families today being daycare} What about the kids? It is very expensive to feed and clothe a small family is it not? Next is shelter? The cost of the home itself so all could live together. Kids get sick also. Medical bills!
Ok that's the basics. Now then where do many end up who attempt this lifestyle in our times? The mothers & children often end up on welfare, the family lives in separate houses where Papa visits them when it's their turn, and me, you, and the guy down the street help pay for a lifestyle totally out of sync with scripture. In scripture there was a need today the need is not justified. You see there is no need for polygamy in this day and time. Most drawn into this lifestyle bite off far more than they can chew.
There is no prohibition in the Bible on slavery either. There are however very specific verses though that specify how masters must treat slaves and vice versa. Again in todays age slavery is not a needed nor desirable condition of life especially in this nation. I could never see myself owning one for several reasons. I think if possible all persons should not be enslaved to others. That includes the Marriage Covenant which in scripture mans and woman's conduct inside the marriage to each other is specified.
Next I would not want the responsibility of providing the needs of a slave. In many ways the marriages of old with many wives were in fact just that. The wives had two masters the lead wife and the husband. There is no way to paint a rosie picture of that part of mans history either as it was out of necessity.
You are really limiting your thinking. Just because you don't see how something you don't approve of would work doesn't negate it in any way.
And since you brought it up, you are correct, there is no prohibition against slavery. And I get much the same stuff when I point out that anyone calling slavery in the US to be a great sin is just wrong. But Biblical slavery did not even imply whippings, or mistreatment.
And yes, slavery still exists to this day. Just because one goes home at 5 pm doesn't negate a servitude position.